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Showing results 1 to 12 of 12 Search took 0.00 seconds. Search: Posts Made By: Mohsin

Forum: FLUENT October 13, 2011, 20:13

Replies: 30 Residual rise Views: 21,840 Posted By Mohsin Hello Riccia Suggestions for you: 1.... Hello Riccia Suggestions for you: 1. If the residuals rise (for example, first converge and then start to diverge) then wait for some iterations to see whether they converge again or not. If...

Forum: FLUENT October 13, 2011, 10:25

Replies: 30 Residual rise Views: 21,840 Posted By Mohsin Please explain your problem.... Are u seeing... Please explain your problem.... Are u seeing residual rise in your solution?

Forum: FLUENT July 29, 2010, 04:10

Replies: 30 Residual rise Views: 21,840 Posted By Mohsin Brrrrrrrrr Well. I think i have to invite... Brrrrrrrrr Well. I think i have to invite you here to South Korea to solve this one:) Lets nap first and then think about some solution:)Thanks anyway.... Mohsin

Forum: FLUENT July 29, 2010, 03:34

Replies: 30 Residual rise Views: 21,840 Posted By Mohsin Convergence Criteria Contours flux reports ... Convergence Criteria Contours flux reports In the previous case of 1200 iterations all were satisfied. Would you still recommend to iterate more? (if i iterate more the residuals for K and E...

Forum: FLUENT July 29, 2010, 03:25

Replies: 30 Residual rise Views: 21,840 Posted By Mohsin After almost 9500 iterations for 1 million mesh.... After almost 9500 iterations for 1 million mesh. I got the following residulas with under relaxation for Pressure=0.35, momentum=0.6 and K and E equal to 0.5 each. Its confusing. (why increasing the...

Forum: FLUENT July 29, 2010, 02:36

Replies: 30 Residual rise Views: 21,840 Posted By Mohsin Thank you Max. My geometry is scaled. When... Thank you Max. My geometry is scaled. When i started Fluent I changed all the dimensions into mm and then scaled them. (But when i click on summary it gives all values in meters). I have...

Forum: FLUENT July 27, 2010, 04:04

Replies: 30 Residual rise Views: 21,840 Posted By Mohsin *The energy Equations are turned off. Mach Number... *The energy Equations are turned off. Mach Number lies in subsonic region as the velocity of the gas is only 15 m/s. *The scheme is already second order. and for pressure I am using PRESTO scheme...

Forum: FLUENT July 26, 2010, 04:11

Replies: 30 Residual rise Views: 21,840 Posted By Mohsin The Re number at the inlets is around 30,000 to... The Re number at the inlets is around 30,000 to 50,000 (which should be above 4000 for turbulence as Nitrogen gas is used in a cylinder). As gas is used so it is compressible. At first i...

Forum: FLUENT July 23, 2010, 12:43

Replies: 30 Residual rise Views: 21,840 Posted By Mohsin Max I did what you said. I did simulation without... Max I did what you said. I did simulation without DPM but I got exactly the same results (the K and E are diverging). That means the problem is not with multiphase modeling. The problem is with flow...

Forum: FLUENT July 23, 2010, 03:07

Replies: 30 Residual rise Views: 21,840 Posted By Mohsin Chris: without Urf change I still get a diverged... Chris: without Urf change I still get a diverged trend for K and E. Initially the trend was converging until around 600 iterations then it diverged to a maximum level and then remained constant...

Forum: FLUENT July 22, 2010, 11:08

Replies: 30 Residual rise Views: 21,840 Posted By Mohsin Thank you for your answers/suggestions. 1.... Thank you for your answers/suggestions. 1. Max: I am using KE model. The residuals for K and Epsilon converge until 300 iterations but after that it doesn't converge and keep on diverging. To...

Forum: FLUENT July 21, 2010, 04:08

Replies: 30 Residual rise Views: 21,840 Posted By Mohsin Residual rise hello I hope you people are doing well. During my fluent's simulation using k-Epsilon model the residual level reduces (trys to converge) but at some point in the calculation the residauls for k...

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