# Pressure distribution on a wall

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 October 26, 2013, 09:35 Pressure distribution on a wall #1 New Member   Darázs Bence Join Date: Feb 2013 Posts: 16 Rep Power: 5 Hello Everyone, I'd like to display the pressure distribution along a wall. How can i do this? I want to make a chart and not a contour plot, the x axis would be the angle from 0 to 360 degrees and the y axis the pressure. Thank you guys in advance

 October 27, 2013, 06:22 #2 Super Moderator   Glenn Horrocks Join Date: Mar 2009 Location: Sydney, Australia Posts: 12,709 Rep Power: 98 Pressure distribution on a wall - just plot pressure on the wall object. You want to make a chart? If x is rotation angle - angle from what? Averaged or sampled how?

 October 3, 2015, 04:14 #3 Member   Attique Javaid Join Date: Apr 2015 Location: Pakistan Posts: 57 Rep Power: 3 My objective is to get pressure distribution over the wall. geometry is not axisymmetric. using k-epsilon with scalable wall function. system is at high pressure and temperature and i'm using average flow properties for a range. just before where it's crashing, i stopped the run and got this: Looking at v-mom imbalance and specifically monitoring the boundary flow variables at blockage, i couldn't understand that why i'm getting this issue at this position. i've posted yplus contours and mesh of that region. Kindly have a look at it please. I'll be thankful for your help. regards, AJ

 October 3, 2015, 04:17 #5 Member   Attique Javaid Join Date: Apr 2015 Location: Pakistan Posts: 57 Rep Power: 3 Velocity = 7.2832E+00 Advection Time = 3.5829E-01 Reynolds Number = 1.5607E+08 Thermal Conductivity = 5.6185E-01 Specific Heat Capacity at Constant Pressure = 5.4689E+03 Prandtl Number = 8.6047E-01 +--------------------------------------------------------------------+ | Checking for Isolated Fluid Regions | +--------------------------------------------------------------------+ No isolated fluid regions were found. +--------------------------------------------------------------------+ | The Equations Solved in This Calculation | +--------------------------------------------------------------------+ Subsystem : Momentum and Mass U-Mom V-Mom W-Mom P-Mass Subsystem : Heat Transfer H-Energy Subsystem : TurbKE and Diss.K K-TurbKE E-Diss.K CFD Solver started: Sat Oct 03 10:48:31 2015 +--------------------------------------------------------------------+ | Convergence History | +--------------------------------------------------------------------+ ================================================== ==================== OUTER LOOP ITERATION = 1 CPU SECONDS = 3.887E+01 ---------------------------------------------------------------------- | Equation | Rate | RMS Res | Max Res | Linear Solution | +----------------------+------+---------+---------+------------------+ | U-Mom | 0.00 | 1.2E-06 | 5.9E-05 | 1.6E+02 F | | V-Mom | 0.00 | 6.7E-03 | 8.8E-02 | 6.4E-03 OK| | W-Mom | 0.00 | 1.6E-06 | 3.4E-05 | 7.8E+01 F | | P-Mass | 0.00 | 2.5E-04 | 1.0E-02 | 9.0 6.2E-01 ok| +----------------------+------+---------+---------+------------------+ | H-Energy | 0.00 | 4.2E-04 | 5.0E-03 | 5.9 1.3E-05 OK| +----------------------+------+---------+---------+------------------+ | K-TurbKE | 0.00 | 9.0E-02 | 1.3E+00 | 5.9 6.0E-11 OK| | E-Diss.K | 0.00 | 5.3E-02 | 1.8E+00 | 7.7 2.0E-11 OK| +----------------------+------+---------+---------+------------------+ ================================================== ==================== OUTER LOOP ITERATION = 2 CPU SECONDS = 2.223E+02 ---------------------------------------------------------------------- | Equation | Rate | RMS Res | Max Res | Linear Solution | +----------------------+------+---------+---------+------------------+ | U-Mom |99.99 | 8.0E-03 | 1.9E-01 | 1.8E-03 OK| | V-Mom | 5.50 | 3.7E-02 | 2.8E-01 | 9.4E-04 OK| | W-Mom |99.99 | 6.1E-03 | 1.3E-01 | 1.9E-03 OK| | P-Mass | 0.48 | 1.2E-04 | 1.6E-02 | 33.1 8.5E-02 OK| +----------------------+------+---------+---------+------------------+ | H-Energy |19.93 | 8.4E-03 | 3.8E-01 | 5.9 1.0E-06 OK| +----------------------+------+---------+---------+------------------+ | K-TurbKE | 0.41 | 3.7E-02 | 1.3E+00 | 5.9 5.1E-08 OK| | E-Diss.K | 0.62 | 3.3E-02 | 1.1E+00 | 8.1 7.1E-12 OK| +----------------------+------+---------+---------+------------------+ ================================================== ==================== OUTER LOOP ITERATION = 3 CPU SECONDS = 4.214E+02 ---------------------------------------------------------------------- | Equation | Rate | RMS Res | Max Res | Linear Solution | +----------------------+------+---------+---------+------------------+ | U-Mom | 2.19 | 1.8E-02 | 4.2E-01 | 6.7E-04 OK| | V-Mom | 1.09 | 4.0E-02 | 2.5E-01 | 2.1E-03 OK| | W-Mom | 1.92 | 1.2E-02 | 3.0E-01 | 7.3E-04 OK| | P-Mass | 2.33 | 2.8E-04 | 1.2E-02 | 29.1 8.0E-02 OK| +----------------------+------+---------+---------+------------------+ | H-Energy | 1.61 | 1.3E-02 | 5.2E-01 | 6.2 2.9E-06 OK| +----------------------+------+---------+---------+------------------+ | K-TurbKE | 0.80 | 3.0E-02 | 8.3E-01 | 6.2 2.8E-06 OK| | E-Diss.K | 0.51 | 1.7E-02 | 5.1E-01 | 8.3 5.9E-11 OK| +----------------------+------+---------+---------+------------------+ ================================================== ==================== OUTER LOOP ITERATION = 4 CPU SECONDS = 6.151E+02 ---------------------------------------------------------------------- | Equation | Rate | RMS Res | Max Res | Linear Solution | +----------------------+------+---------+---------+------------------+ | U-Mom | 1.12 | 2.0E-02 | 3.7E+00 | 1.0E-04 OK| | V-Mom | 0.45 | 1.8E-02 | 1.3E-01 | 3.3E-04 OK| | W-Mom | 0.86 | 1.0E-02 | 1.5E+00 | 1.1E-04 OK| | P-Mass | 1.47 | 4.1E-04 | 2.8E-02 | 33.1 8.8E-02 OK| +----------------------+------+---------+---------+------------------+ | H-Energy | 0.62 | 8.4E-03 | 2.0E-01 | 6.2 4.5E-06 OK| +----------------------+------+---------+---------+------------------+ | K-TurbKE | 1.07 | 3.2E-02 | 8.8E-01 | 6.2 5.3E-06 OK| | E-Diss.K | 0.43 | 7.3E-03 | 2.5E-01 | 8.5 2.5E-10 OK| +----------------------+------+---------+---------+------------------+ ================================================== ==================== OUTER LOOP ITERATION = 5 CPU SECONDS = 8.134E+02 ---------------------------------------------------------------------- | Equation | Rate | RMS Res | Max Res | Linear Solution | +----------------------+------+---------+---------+------------------+ | U-Mom | 0.70 | 1.4E-02 | 2.2E-01 | 8.4E-04 OK| | V-Mom | 0.36 | 6.4E-03 | 1.3E-01 | 2.8E-03 OK| | W-Mom | 0.64 | 6.4E-03 | 9.8E-02 | 9.4E-04 OK| | P-Mass | 0.94 | 3.9E-04 | 2.5E-02 | 25.1 4.4E-01 ok| +----------------------+------+---------+---------+------------------+ | H-Energy | 0.63 | 5.3E-03 | 1.4E-01 | 6.2 3.8E-06 OK| +----------------------+------+---------+---------+------------------+ | K-TurbKE | 0.90 | 2.9E-02 | 9.2E-01 | 6.2 8.2E-06 OK| | E-Diss.K | 0.97 | 7.1E-03 | 2.4E-01 | 8.7 2.3E-09 OK| +----------------------+------+---------+---------+------------------+ ================================================== ==================== OUTER LOOP ITERATION = 6 CPU SECONDS = 1.002E+03 ---------------------------------------------------------------------- | Equation | Rate | RMS Res | Max Res | Linear Solution | +----------------------+------+---------+---------+------------------+ | U-Mom | 0.63 | 8.5E-03 | 9.3E-02 | 1.3E-03 OK| | V-Mom | 0.95 | 6.1E-03 | 1.0E-01 | 4.0E-03 OK| | W-Mom | 0.67 | 4.3E-03 | 8.6E-02 | 1.2E-03 OK| | P-Mass | 0.88 | 3.4E-04 | 1.9E-02 | 29.1 9.3E-02 OK| +----------------------+------+---------+---------+------------------+ | H-Energy | 1.57 | 8.3E-03 | 2.5E-01 | 6.1 6.6E-06 OK| +----------------------+------+---------+---------+------------------+ | K-TurbKE | 0.70 | 2.0E-02 | 8.8E-01 | 6.2 1.1E-05 OK| | E-Diss.K | 1.68 | 1.2E-02 | 3.6E-01 | 7.4 1.1E-08 OK| +----------------------+------+---------+---------+------------------+ ================================================== ==================== OUTER LOOP ITERATION = 7 CPU SECONDS = 1.196E+03 ---------------------------------------------------------------------- | Equation | Rate | RMS Res | Max Res | Linear Solution | +----------------------+------+---------+---------+------------------+ | U-Mom | 0.54 | 4.6E-03 | 1.1E-01 | 1.3E-03 OK| | V-Mom | 0.97 | 6.0E-03 | 2.3E-01 | 3.5E-03 OK| | W-Mom | 0.70 | 3.0E-03 | 9.4E-02 | 1.1E-03 OK| | P-Mass | 0.44 | 1.5E-04 | 6.3E-03 | 33.1 9.1E-02 OK| +----------------------+------+---------+---------+------------------+ | H-Energy | 1.21 | 1.0E-02 | 3.0E-01 | 6.1 8.7E-06 OK| +----------------------+------+---------+---------+------------------+ | K-TurbKE | 0.70 | 1.4E-02 | 6.1E-01 | 6.1 1.4E-05 OK| | E-Diss.K | 1.34 | 1.6E-02 | 6.8E-01 | 7.4 3.3E-08 OK| +----------------------+------+---------+---------+------------------+ ================================================== ==================== OUTER LOOP ITERATION = 8 CPU SECONDS = 1.396E+03 ---------------------------------------------------------------------- | Equation | Rate | RMS Res | Max Res | Linear Solution | +----------------------+------+---------+---------+------------------+ | U-Mom | 0.85 | 3.9E-03 | 1.1E-01 | 1.1E-03 OK| | V-Mom | 0.85 | 5.1E-03 | 2.3E-01 | 3.1E-03 OK| | W-Mom | 0.81 | 2.5E-03 | 1.4E-01 | 9.2E-04 OK| | P-Mass | 0.65 | 9.8E-05 | 3.5E-03 | 25.1 8.4E-02 OK| +----------------------+------+---------+---------+------------------+ | H-Energy | 0.84 | 8.4E-03 | 2.3E-01 | 6.1 1.0E-05 OK| +----------------------+------+---------+---------+------------------+ | K-TurbKE | 0.77 | 1.1E-02 | 5.1E-01 | 6.1 1.6E-05 OK| | E-Diss.K | 0.69 | 1.1E-02 | 1.6E+00 | 7.4 1.1E-07 OK| +----------------------+------+---------+---------+------------------+ ================================================== ==================== OUTER LOOP ITERATION = 9 CPU SECONDS = 1.584E+03 ---------------------------------------------------------------------- | Equation | Rate | RMS Res | Max Res | Linear Solution | +----------------------+------+---------+---------+------------------+ | U-Mom | 1.06 | 4.1E-03 | 1.6E-01 | 5.8E-04 OK| | V-Mom | 0.91 | 4.6E-03 | 3.4E-01 | 1.3E-03 OK| | W-Mom | 0.93 | 2.3E-03 | 1.1E-01 | 4.7E-04 OK| | P-Mass | 0.91 | 8.9E-05 | 3.7E-03 | 21.1 8.0E-02 OK| +----------------------+------+---------+---------+------------------+ | H-Energy | 0.74 | 6.2E-03 | 1.4E-01 | 6.0 1.1E-05 OK| +----------------------+------+---------+---------+------------------+ | K-TurbKE | 0.87 | 9.5E-03 | 5.4E-01 | 6.0 1.9E-05 OK| | E-Diss.K | 0.80 | 8.8E-03 | 1.6E+00 | 7.4 2.7E-07 OK| +----------------------+------+---------+---------+------------------+ ================================================== ==================== OUTER LOOP ITERATION = 10 CPU SECONDS = 1.766E+03 ---------------------------------------------------------------------- | Equation | Rate | RMS Res | Max Res | Linear Solution | +----------------------+------+---------+---------+------------------+ | U-Mom | 1.01 | 4.1E-03 | 4.5E-01 | 5.7E-04 OK| | V-Mom | 1.25 | 5.8E-03 | 9.4E-01 | 1.1E-03 OK| | W-Mom | 1.07 | 2.5E-03 | 3.2E-01 | 6.1E-04 OK| | P-Mass | 0.90 | 8.0E-05 | 3.6E-03 | 21.1 8.0E-02 OK| +----------------------+------+---------+---------+------------------+ | H-Energy | 0.71 | 4.4E-03 | 8.9E-02 | 6.0 1.0E-05 OK| +----------------------+------+---------+---------+------------------+ | K-TurbKE | 0.98 | 9.3E-03 | 9.1E-01 | 6.0 2.0E-05 OK| | E-Diss.K | 0.97 | 8.5E-03 | 1.5E+00 | 7.4 2.4E-07 OK| +----------------------+------+---------+---------+------------------+ ================================================== ==================== OUTER LOOP ITERATION = 11 CPU SECONDS = 1.952E+03 ---------------------------------------------------------------------- | Equation | Rate | RMS Res | Max Res | Linear Solution | +----------------------+------+---------+---------+------------------+ | U-Mom | 1.08 | 4.5E-03 | 6.6E-01 | 1.1E-03 OK| | V-Mom | 1.58 | 9.2E-03 | 1.3E+00 | 8.7E-04 OK| | W-Mom | 1.40 | 3.4E-03 | 5.1E-01 | 1.1E-03 OK| | P-Mass | 0.95 | 7.6E-05 | 1.2E-02 | 21.1 9.6E-02 OK| +----------------------+------+---------+---------+------------------+ | H-Energy | 0.77 | 3.4E-03 | 1.2E-01 | 6.0 8.1E-06 OK| +----------------------+------+---------+---------+------------------+ | K-TurbKE | 0.73 | 6.8E-03 | 1.3E+00 | 6.0 1.9E-05 OK| | E-Diss.K | 0.80 | 6.8E-03 | 1.5E+00 | 7.4 6.0E-08 OK| +----------------------+------+---------+---------+------------------+ ================================================== ==================== OUTER LOOP ITERATION = 12 CPU SECONDS = 2.142E+03 ---------------------------------------------------------------------- | Equation | Rate | RMS Res | Max Res | Linear Solution | +----------------------+------+---------+---------+------------------+ | U-Mom | 0.72 | 3.2E-03 | 4.3E-01 | 1.4E-03 OK| | V-Mom | 0.78 | 7.1E-03 | 7.4E-01 | 6.9E-04 OK| | W-Mom | 0.81 | 2.8E-03 | 3.8E-01 | 1.2E-03 OK| | P-Mass | 1.25 | 9.6E-05 | 1.8E-02 | 21.1 9.7E-02 OK| +----------------------+------+---------+---------+------------------+ | H-Energy | 0.91 | 3.1E-03 | 1.6E-01 | 6.0 7.2E-06 OK| +----------------------+------+---------+---------+------------------+ | K-TurbKE | 0.93 | 6.4E-03 | 9.4E-01 | 6.0 9.2E-06 OK| | E-Diss.K | 0.92 | 6.3E-03 | 1.7E+00 | 7.4 1.1E-08 OK| +----------------------+------+---------+---------+------------------+ ================================================== ==================== OUTER LOOP ITERATION = 13 CPU SECONDS = 2.330E+03 ---------------------------------------------------------------------- | Equation | Rate | RMS Res | Max Res | Linear Solution | +----------------------+------+---------+---------+------------------+ | U-Mom | 1.13 | 3.6E-03 | 7.5E-01 | 1.1E-03 OK| | V-Mom | 1.09 | 7.8E-03 | 1.4E+00 | 3.7E-04 OK| | W-Mom | 1.19 | 3.3E-03 | 5.9E-01 | 7.9E-04 OK| | P-Mass | 1.70 | 1.6E-04 | 2.8E-02 | 17.1 8.7E-02 OK| +----------------------+------+---------+---------+------------------+ | H-Energy | 1.05 | 3.2E-03 | 2.7E-01 | 5.9 6.4E-06 OK| +----------------------+------+---------+---------+------------------+ | K-TurbKE | 0.69 | 4.4E-03 | 8.2E-01 | 5.9 4.7E-06 OK| | E-Diss.K | 0.87 | 5.4E-03 | 1.3E+00 | 7.4 3.4E-09 OK| +----------------------+------+---------+---------+------------------+ ================================================== ==================== OUTER LOOP ITERATION = 14 CPU SECONDS = 2.515E+03 ---------------------------------------------------------------------- | Equation | Rate | RMS Res | Max Res | Linear Solution | +----------------------+------+---------+---------+------------------+ | U-Mom | 0.95 | 3.5E-03 | 5.1E-01 | 1.5E-03 OK| | V-Mom | 0.90 | 7.0E-03 | 8.4E-01 | 4.4E-04 OK| | W-Mom | 1.04 | 3.5E-03 | 4.4E-01 | 8.2E-04 OK| | P-Mass | 0.60 | 9.8E-05 | 1.3E-02 | 5.0 7.2E-02 OK| +----------------------+------+---------+---------+------------------+ | H-Energy | 1.72 | 5.5E-03 | 9.8E-01 | 5.9 3.6E-06 OK| +----------------------+------+---------+---------+------------------+ | K-TurbKE | 0.57 | 2.5E-03 | 4.9E-01 | 5.9 6.5E-06 OK| | E-Diss.K | 0.37 | 2.0E-03 | 2.9E-01 | 7.4 4.1E-09 OK| +----------------------+------+---------+---------+------------------+ ================================================== ==================== OUTER LOOP ITERATION = 15 CPU SECONDS = 2.687E+03 ---------------------------------------------------------------------- | Equation | Rate | RMS Res | Max Res | Linear Solution | +----------------------+------+---------+---------+------------------+ | U-Mom | 1.21 | 4.2E-03 | 5.6E-01 | 1.2E-03 OK| | V-Mom | 1.07 | 7.5E-03 | 7.5E-01 | 5.8E-04 OK| | W-Mom | 1.20 | 4.2E-03 | 4.4E-01 | 7.0E-04 OK| | P-Mass | 0.66 | 6.5E-05 | 1.0E-02 | 5.0 9.0E-02 OK| +----------------------+------+---------+---------+------------------+ | H-Energy | 1.05 | 5.8E-03 | 1.2E+00 | 5.9 1.3E-06 OK| +----------------------+------+---------+---------+------------------+ | K-TurbKE | 1.48 | 3.7E-03 | 1.0E+00 | 5.9 1.4E-06 OK| | E-Diss.K | 1.22 | 2.4E-03 | 5.8E-01 | 7.4 1.5E-09 OK| +----------------------+------+---------+---------+------------------+ ================================================== ==================== OUTER LOOP ITERATION = 16 CPU SECONDS = 2.851E+03 ---------------------------------------------------------------------- | Equation | Rate | RMS Res | Max Res | Linear Solution | +----------------------+------+---------+---------+------------------+ | U-Mom | 0.87 | 3.6E-03 | 8.9E-01 | 4.4E-04 OK| | V-Mom | 0.80 | 6.0E-03 | 1.2E+00 | 1.8E-04 OK| | W-Mom | 0.68 | 2.9E-03 | 6.1E-01 | 5.8E-04 OK| | P-Mass | 0.50 | 3.2E-05 | 6.3E-03 | 5.0 4.3E-02 OK| +----------------------+------+---------+---------+------------------+ | H-Energy | 0.94 | 5.4E-03 | 9.0E-01 | 5.9 1.9E-07 OK| +----------------------+------+---------+---------+------------------+ | K-TurbKE | 2.14 | 7.9E-03 | 1.6E+00 | 5.9 4.8E-08 OK| | E-Diss.K | 2.90 | 7.0E-03 | 1.9E+00 | 7.5 3.1E-11 OK| +----------------------+------+---------+---------+------------------+ ================================================== ==================== OUTER LOOP ITERATION = 17 CPU SECONDS = 3.013E+03 ---------------------------------------------------------------------- | Equation | Rate | RMS Res | Max Res | Linear Solution | +----------------------+------+---------+---------+------------------+ | U-Mom | 1.00 | 3.6E-03 | 9.3E-01 | 2.4E-04 OK| | V-Mom | 1.03 | 6.2E-03 | 1.3E+00 | 1.6E-04 OK| | W-Mom | 1.03 | 2.9E-03 | 6.4E-01 | 5.0E-04 OK| | P-Mass | 1.81 | 5.9E-05 | 1.3E-02 | 5.0 6.0E-02 OK| +----------------------+------+---------+---------+------------------+ | H-Energy | 0.82 | 4.5E-03 | 6.9E-01 | 5.9 4.5E-08 OK| +----------------------+------+---------+---------+------------------+ | K-TurbKE | 0.72 | 5.7E-03 | 1.3E+00 | 5.9 3.6E-09 OK| | E-Diss.K | 0.96 | 6.7E-03 | 1.9E+00 | 7.5 7.8E-13 OK| +----------------------+------+---------+---------+------------------+ ================================================== ==================== OUTER LOOP ITERATION = 18 CPU SECONDS = 3.174E+03 ---------------------------------------------------------------------- | Equation | Rate | RMS Res | Max Res | Linear Solution | +----------------------+------+---------+---------+------------------+ | U-Mom | 0.83 | 3.0E-03 | 5.4E-01 | 2.0E-04 OK| | V-Mom | 0.88 | 5.5E-03 | 6.9E-01 | 1.5E-04 OK| | W-Mom | 0.91 | 2.7E-03 | 4.0E-01 | 3.9E-04 OK| | P-Mass | 0.98 | 5.8E-05 | 1.4E-02 | 5.0 2.0E-02 OK| +----------------------+------+---------+---------+------------------+ | H-Energy | 2.36 | 1.1E-02 | 2.3E+00 | 5.9 8.2E-09 OK| +----------------------+------+---------+---------+------------------+ | K-TurbKE | 0.61 | 3.5E-03 | 4.9E-01 | 5.9 3.0E-09 OK| | E-Diss.K | 0.51 | 3.4E-03 | 7.9E-01 | 7.5 3.6E-13 OK| +----------------------+------+---------+---------+------------------+ ================================================== ==================== OUTER LOOP ITERATION = 19 CPU SECONDS = 3.336E+03 ---------------------------------------------------------------------- | Equation | Rate | RMS Res | Max Res | Linear Solution | +----------------------+------+---------+---------+------------------+ | U-Mom | 1.74 | 5.2E-03 | 9.3E-01 | 2.1E-04 OK| | V-Mom | 1.29 | 7.1E-03 | 1.0E+00 | 2.2E-04 OK| | W-Mom | 1.52 | 4.1E-03 | 6.4E-01 | 4.4E-04 OK| | P-Mass | 1.16 | 6.7E-05 | 9.5E-03 | 5.0 1.9E-02 OK| +----------------------+------+---------+---------+------------------+ | H-Energy | 0.77 | 8.1E-03 | 1.4E+00 | 5.9 2.3E-09 OK| +----------------------+------+---------+---------+------------------+ | K-TurbKE | 1.51 | 5.3E-03 | 1.2E+00 | 5.9 4.9E-10 OK| | E-Diss.K | 1.30 | 4.4E-03 | 1.3E+00 | 7.5 6.9E-14 OK| +----------------------+------+---------+---------+------------------+ ================================================== ==================== OUTER LOOP ITERATION = 20 CPU SECONDS = 3.499E+03 ---------------------------------------------------------------------- | Equation | Rate | RMS Res | Max Res | Linear Solution | +----------------------+------+---------+---------+------------------+ | U-Mom | 0.72 | 3.8E-03 | 8.6E-01 | 3.3E-04 OK| | V-Mom | 0.61 | 4.3E-03 | 8.4E-01 | 2.0E-04 OK| | W-Mom | 0.63 | 2.6E-03 | 5.2E-01 | 8.1E-04 OK| | P-Mass | 0.22 | 1.5E-05 | 3.3E-03 | 5.0 6.1E-02 OK| +----------------------+------+---------+---------+------------------+ | H-Energy | 0.67 | 5.5E-03 | 9.5E-01 | 5.9 1.7E-09 OK| +----------------------+------+---------+---------+------------------+ | K-TurbKE | 1.23 | 6.5E-03 | 1.5E+00 | 5.9 2.0E-11 OK| | E-Diss.K | 1.38 | 6.1E-03 | 1.9E+00 | 7.4 2.5E-15 OK| +----------------------+------+---------+---------+------------------+ Execution terminating: STP file found.

 October 3, 2015, 04:17 #6 Member   Attique Javaid Join Date: Apr 2015 Location: Pakistan Posts: 57 Rep Power: 3 CFD Solver finished: Sat Oct 03 11:03:36 2015 CFD Solver wall clock seconds: 9.0584E+02 ================================================== ==================== Termination and Interrupt Condition Summary ================================================== ==================== CFD Solver: Stop instruction received ================================================== ==================== Boundary Flow and Total Source Term Summary ================================================== ==================== +--------------------------------------------------------------------+ | U-Mom | +--------------------------------------------------------------------+ Boundary : block 2.2237E+03 Boundary : in1 -2.0765E+05 Boundary : in2 2.1187E+05 Boundary : inwall -1.7517E+03 Boundary : outlet 6.4734E+02 Boundary : outwall -2.2986E+03 ----------- Domain Imbalance : 3.0427E+03 +--------------------------------------------------------------------+ | V-Mom | +--------------------------------------------------------------------+ Boundary : block -1.2568E+05 Boundary : in1 1.3418E-04 Boundary : in2 1.3378E-04 Boundary : inwall -1.5951E+05 Boundary : outlet 2.8835E+05 Boundary : outwall -5.6425E+05 ----------- Domain Imbalance : -5.6109E+05 +--------------------------------------------------------------------+ | W-Mom | +--------------------------------------------------------------------+ Boundary : block -1.2866E+03 Boundary : in1 -1.3647E+05 Boundary : in2 1.3925E+05 Boundary : inwall -8.9143E+03 Boundary : outlet -2.3447E+00 Boundary : outwall 5.8704E+03 ----------- Domain Imbalance : -1.5580E+03 +--------------------------------------------------------------------+ | P-Mass | +--------------------------------------------------------------------+ Boundary : in1 6.6884E+03 Boundary : in2 6.6884E+03 Boundary : outlet -1.3381E+04 ----------- Domain Imbalance : -4.5354E+00 +--------------------------------------------------------------------+ | H-Energy | +--------------------------------------------------------------------+ Boundary : in1 7.5847E+09 Bnd Src/Visc Work: in1 -3.8741E-04 Boundary : in2 7.5849E+09 Bnd Src/Visc Work: in2 -3.8593E-04 Boundary : outlet -1.5169E+10 Bnd Src/Visc Work: outlet -2.4713E-05 Domain Src (Neg) : Default Domain -2.0512E+10 Domain Src (Pos) : Default Domain 2.0512E+10 ----------- Domain Imbalance : 4.7423E+05 +--------------------------------------------------------------------+ | Normalised Imbalance Summary | +--------------------------------------------------------------------+ | Equation | Maximum Flow | Imbalance (%) | +--------------------------------------------------------------------+ | U-Mom | 5.6425E+05 | 0.5393 | | V-Mom | 5.6425E+05 | -99.4394 | | W-Mom | 5.6425E+05 | -0.2761 | | P-Mass | 1.3381E+04 | -0.0339 | +----------------------+-----------------------+---------------------+ | H-Energy | 2.0512E+10 | 0.0023 | +----------------------+-----------------------+---------------------+ ================================================== ==================== Wall Force and Moment Summary ================================================== ==================== Notes: 1. Pressure integrals exclude the reference pressure. To include it, set the expert parameter 'include pref in forces = t'. +--------------------------------------------------------------------+ | Pressure Force On Walls | +--------------------------------------------------------------------+ X-Comp. Y-Comp. Z-Comp. Domain Group: Default Domain block -2.2182E+03 1.2570E+05 1.2815E+03 inwall 1.7779E+03 1.5617E+05 8.9011E+03 outwall 2.2346E+03 5.6885E+05 -5.9112E+03 ----------- ----------- ----------- Domain Group Totals : 1.7942E+03 8.5072E+05 4.2715E+03 +--------------------------------------------------------------------+ | Viscous Force On Walls | +--------------------------------------------------------------------+ X-Comp. Y-Comp. Z-Comp. Domain Group: Default Domain block -5.4715E+00 -2.0507E+01 5.0247E+00 inwall -2.6183E+01 3.3400E+03 1.3137E+01 outwall 6.3988E+01 -4.5994E+03 4.0715E+01 ----------- ----------- ----------- Domain Group Totals : 3.2333E+01 -1.2798E+03 5.8877E+01 +--------------------------------------------------------------------+ | Pressure Moment On Walls | +--------------------------------------------------------------------+ X-Comp. Y-Comp. Z-Comp. Domain Group: Default Domain block 1.1891E+04 -3.8765E+03 6.9287E+03 inwall 4.4601E+04 -1.2711E+01 -3.3111E+04 outwall -3.2175E+04 5.2149E+05 1.9172E+04 ----------- ----------- ----------- Domain Group Totals : 2.4318E+04 5.1760E+05 -7.0105E+03 +--------------------------------------------------------------------+ | Viscous Moment On Walls | +--------------------------------------------------------------------+ X-Comp. Y-Comp. Z-Comp. Domain Group: Default Domain block 5.7439E+01 -3.2706E+00 1.3736E+01 inwall 1.0823E+02 6.2429E+03 8.4841E+01 outwall 1.1748E+02 -5.2535E+03 -2.8897E+02 ----------- ----------- ----------- Domain Group Totals : 2.8315E+02 9.8616E+02 -1.9040E+02 +--------------------------------------------------------------------+ | Locations of Maximum Residuals | +--------------------------------------------------------------------+ | Equation | Domain Name | Node Number | +--------------------------------------------------------------------+ | U-Mom | Default Domain | 414563 | | V-Mom | Default Domain | 414527 | | W-Mom | Default Domain | 414527 | | P-Mass | Default Domain | 423396 | +----------------------+-----------------------+---------------------+ | H-Energy | Default Domain | 414538 | +----------------------+-----------------------+---------------------+ | K-TurbKE | Default Domain | 423395 | | E-Diss.K | Default Domain | 423394 | +----------------------+-----------------------+---------------------+ +--------------------------------------------------------------------+ | Average Scale Information | +--------------------------------------------------------------------+ Domain Name : Default Domain Global Length = 2.6095E+00 Minimum Extent = 5.8540E+00 Maximum Extent = 1.5531E+01 Density = 7.2594E+02 Dynamic Viscosity = 8.8400E-05 Velocity = 2.4291E+01 Advection Time = 1.0743E-01 Reynolds Number = 5.2053E+08 Thermal Conductivity = 5.6185E-01 Specific Heat Capacity at Constant Pressure = 5.4689E+03 Prandtl Number = 8.6047E-01 Temperature Range = 6.5129E+02 +--------------------------------------------------------------------+ | Variable Range Information | +--------------------------------------------------------------------+ Domain Name : Default Domain +--------------------------------------------------------------------+ | Variable Name | min | max | +--------------------------------------------------------------------+ | Density | 7.26E+02 | 7.26E+02 | | Specific Heat Capacity at Constant Pressure| 5.47E+03 | 5.47E+03 | | Dynamic Viscosity | 8.84E-05 | 8.84E-05 | | Thermal Conductivity | 5.62E-01 | 5.62E-01 | | Static Entropy | -4.09E+05 | 4.27E+03 | | Velocity u | -3.14E+03 | 3.19E+03 | | Velocity v | -3.50E+03 | 5.95E+02 | | Velocity w | -1.80E+03 | 1.82E+03 | | Pressure | -7.57E+07 | 2.55E+08 | | Turbulence Kinetic Energy | 5.51E-11 | 3.39E+06 | | Turbulence Eddy Dissipation | 4.18E-07 | 6.50E+14 | | Eddy Viscosity | 8.03E-14 | 9.99E+01 | | Temperature | 0.00E+00 | 6.51E+02 | | Static Enthalpy | -1.58E+06 | 2.26E+06 | | Total Enthalpy | 5.69E+05 | 2.60E+06 | +--------------------------------------------------------------------+ +--------------------------------------------------------------------+ | CPU Requirements of Numerical Solution - Total | +--------------------------------------------------------------------+ Subsystem Name Discretization Linear Solution (secs. %total) (secs. %total) ---------------------------------------------------------------------- Momentum and Mass 1.80E+03 48.6 % 5.16E+02 14.0 % Heat Transfer 5.35E+02 14.5 % 6.64E+01 1.8 % TurbKE and Diss.K 4.31E+02 11.7 % 1.43E+02 3.9 % -------- ------- -------- ------ Subsystem Summary 2.76E+03 74.8 % 7.25E+02 19.6 % Variable Updates 1.21E+02 3.3 % File Reading 1.33E+00 0.0 % File Writing 2.21E+01 0.6 % Miscellaneous 6.22E+01 1.7 % -------- Total 3.70E+03 +--------------------------------------------------------------------+ | Job Information at End of Run | +--------------------------------------------------------------------+ Job finished: Sat Oct 03 11:03:45 2015 Total wall clock time: 9.238E+02 seconds or: ( 0: 0: 15: 23.825 ) ( Days: Hours: Minutes: Seconds ) --> Final synchronization point reached by all partitions. End of solution stage. +--------------------------------------------------------------------+ | The results from this run of the ANSYS CFX Solver have been | | written to C:\Users\attique\Desktop\New folder\100315-7_002.res | +--------------------------------------------------------------------+ This run of the ANSYS CFX Solver has finished. ================================================ cfx generated output file: https://drive.google.com/file/d/0B4Y...ew?usp=sharing Last edited by attiquejavaid08; October 3, 2015 at 08:11. Reason: addition of cfx output file link.

 October 5, 2015, 04:45 #7 Senior Member   Join Date: Feb 2011 Posts: 288 Rep Power: 9 Post sketch of your problem.

October 5, 2015, 11:23
#8
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Attique Javaid
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Quote:
 Originally Posted by Antanas Post sketch of your problem.
here it is, sir.

 October 5, 2015, 17:49 #9 Super Moderator   Glenn Horrocks Join Date: Mar 2009 Location: Sydney, Australia Posts: 12,709 Rep Power: 98 Have you looked at the FAQs? http://www.cfd-online.com/Wiki/Ansys...gence_criteria http://www.cfd-online.com/Wiki/Ansys..._inaccurate.3F

October 6, 2015, 02:02
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Quote:
 Originally Posted by attiquejavaid08 here it is, sir.
Is this fluid domain?

October 6, 2015, 02:22
#11
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Quote:
 Originally Posted by ghorrocks Have you looked at the FAQs? http://www.cfd-online.com/Wiki/Ansys...gence_criteria http://www.cfd-online.com/Wiki/Ansys..._inaccurate.3F
i'm looking into it sir.

Quote:
 Originally Posted by Antanas Is this fluid domain?
yes, it's fluid domain. inlet from pipe sides. and outlet at bottom of the larger cylinder.

 October 6, 2015, 04:44 #12 Member   Attique Javaid Join Date: Apr 2015 Location: Pakistan Posts: 57 Rep Power: 3 Describing here my approach (which I’ve conceived by going through a lot of topics in this forum). I'm using k-epsilon model. I’m not intended to use k-omega because it needs so finer mesh near wall which lead to very high cell count and I’ve maximum 16 GB memory at the moment. So looking at Re~1.38e8, apparently very thin boundary layer, keeping memory limit in view, I decided to go for scalable wall function first. ---------------------------- y+ & first cell height (m) 11 & 2.9e-6 ---------------------------- for this first cell height, i got very low orthogonal quality of mesh. FLUENT didn't accept it and i switched to standard wall function with this intention that i should get first my simulation going on with broad range setup having convergence. i can narrow down the y+ later. Now for standard wall function y+ range i got: ---------------------------- y+ & first cell height (m) 30 & 8e-6 300 & 7.98e-5 ---------------------------- i've been using FLUENT that's why i tried to make things work first in FLUENT. using 7.98e-5 m spacing, at connection of inlet pipes to larger cylindrical domain (at curvature) i got velocities higher than average inlet velocity (as expected). here, y+ was much more greater than 300. so i kept decreasing first cell height. Now, i've reached from 7.98e-5 m to 1.1e-5 m. This is where i'm unable to simulate my problem in FLUENT further. Because orthogonal quality goes lower than 0.01 for mesh with first cell spacing lower than 1.1e-5 m because of this issue, it's not acceptable in FLUENT. Other parameters like min angle, skewness, determinant criterion were in acceptable ranges (which I learnt through this forum). So I tried to check this domain in CFX. The only reason I’ve mentioned my approach is, i need guidance and things to be pointed out if I’m doing anything wrong in the method I’m going through. I understand it’s not a single-sitting-one-attempt-problem-solving job. After getting back to my PC, I’ll surely post figures related to my concerns described above. AJ

October 6, 2015, 05:39
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Got some results.
Attached Images
 res.jpg (61.2 KB, 20 views) solve.jpg (116.2 KB, 19 views)

October 6, 2015, 06:22
#14
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Quote:
 Originally Posted by Antanas Got some results.
looking at results, mass flow rate at outlet seems quite right. imbalances are low enough. pressure distribution seems as it was supposed to be. did you check y+ sir?

P.S. btw i've learnt today a better way to arrange monitors in a windows. TY ^_^
I assume that you've geometry and blocking file from meshing thread.

October 6, 2015, 07:41
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Quote:
 Originally Posted by attiquejavaid08 looking at results, mass flow rate at outlet seems quite right. imbalances are low enough. pressure distribution seems as it was supposed to be. did you check y+ sir? any advice(s) about what was there wrong? please. P.S. btw i've learnt today a better way to arrange monitors in a windows. TY ^_^ I assume that you've geometry and blocking file from meshing thread.
Catch

Last edited by Antanas; October 6, 2015 at 09:54.

October 6, 2015, 08:44
#16
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Attique Javaid
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Quote:
 Originally Posted by ghorrocks Have you looked at the FAQs?http://www.cfd-online.com/Wiki/Ansys...gence_criteria http://www.cfd-online.com/Wiki/Ansys..._inaccurate.3F

Quote:
 Originally Posted by Antanas Catch

what y+ you achieved? did you change the meshing params? or whatever you think is worth sharing.

It's a steady state case. i need to move to transient simulation onwards for almost similar case but with a little modification with extra pipes added. that's why i'm concerned about it sir.

EDIT: I'm sorry. I didn't know that CATCH was a link itself.
got it.

I'll look into it. and will update soon.

Last edited by attiquejavaid08; October 6, 2015 at 10:09.

October 6, 2015, 10:11
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Quote:

1. I used your geo and blocking. Just genereted mesh.
2. I changed solver settings. First I used Upwind advection scheme with auto timescale, then switched to High Res and used prev. results as initial guess. Though I didn't try to use High Res at first. Why did you try to use Specified Blend Factor and Local Timescale Factor? Defaults suit at most cases. Always try to advance from the simple to the complex.
3. I changed Total Energy HT model to Thermal Energy. I didn't investigate its influence on convergence, but are you sure that you need Total Energy? Do kinetic energy effects considerable in your case?

October 6, 2015, 10:38
#18
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Attique Javaid
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Quote:
 Originally Posted by Antanas There's a link in my prev. post. Download and see. 1. I used your geo and blocking. Just genereted mesh. 2. I changed solver settings. First I used Upwind advection scheme with auto timescale, then switched to High Res and used prev. results as initial guess. Though I didn't try to use High Res at first. Why did you try to use Specified Blend Factor and Local Timescale Factor? Defaults suit at most cases. Always try to advance from the simple to the complex. 3. I changed Total Energy HT model to Thermal Energy. I didn't investigate its influence on convergence, but are you sure that you need Total Energy? Do kinetic energy effects considerable in your case?
1. Okay
I was not sure, just read somewhere that blend factor helps in convergence in CFX. Can you explain a little in what conditions a blend factor and local timescale factor to be used? it may be make it more clear to me to cross check my case.
3. I've not involved heating zone in this domain yet. (partially following your advice @ 2) But considering it, i chose total energy.

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