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Change foamLog for Pimple iteration and new variables 

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April 25, 2019, 09:16 
Change foamLog for Pimple iteration and new variables

#1 
Member
Ilan
Join Date: Dec 2018
Posts: 37
Rep Power: 3 
Dear Foamers,
I need a little help for my postprocessing : I use a solid solver to compute a rotation. For each time step, pimple loop is called several times. In each loop, the variable I need to plot (Angular velocity) through time is calculated. I need to extract my angular velocity against time. I just need the last value for each time step. I already used one of the solutions posted on CFD online that used the grep function. But it gives me all the values of the angular velocity independently of the time step. Then I though i should use foamLog to do that. But 1) the function is not really good working when pimple do more than 1 iteration (create a new file for each variable at a certain number of iteration). 2) It is complicated for me to add a new variable in the code. In short, I need a file with 2 colomns : Time step/Last angular velocity of the time step For this type of file : Code:
Starting time loop Courant Number mean: 2.8755e06 max: 0.000106375 deltaT = 5.9988e06 Time = 5.9988e06 PIMPLE: Iteration 1 forces forces: Not including porosity effects 6DoF rigid body motion Centre of rotation: (8.05317e08 1.02214e07 1.49884e18) Centre of mass: (8.05317e08 1.02214e07 1.49884e18) Orientation: (0.710317 0.703881 2.09457e16 0.703881 0.710317 1.1383e15 9.50012e16 6.61124e16 1) Linear velocity: (0 0 0) Angular velocity: (0 0 0) AMI: Creating addressing and weights between 10320 source faces and 10488 target faces AMI: Patch source sum(weights) min/max/average = 0.988487, 1.34623, 1.0066 AMI: Patch target sum(weights) min/max/average = 0.371348, 1.06694, 0.998123 GAMG: Solving for pcorr, Initial residual = 1, Final residual = 0.00954092, No Iterations 5 GAMG: Solving for pcorr, Initial residual = 0.0082744, Final residual = 0.0082744, No Iterations 0 time step continuity errors : sum local = 6.46058e06, global = 1.50885e09, cumulative = 1.50885e09 smoothSolver: Solving for Ux, Initial residual = 1, Final residual = 3.73148e11, No Iterations 1 smoothSolver: Solving for Uy, Initial residual = 1, Final residual = 5.38785e06, No Iterations 1 smoothSolver: Solving for Uz, Initial residual = 0.999958, Final residual = 9.5898e06, No Iterations 1 GAMG: Solving for p, Initial residual = 1, Final residual = 0.00993448, No Iterations 5 GAMG: Solving for p, Initial residual = 0.00830228, Final residual = 3.63498e07, No Iterations 6 time step continuity errors : sum local = 3.62129e14, global = 1.00253e14, cumulative = 1.50886e09 PIMPLE: Iteration 2 forces forces: Not including porosity effects 6DoF rigid body motion Centre of rotation: (8.05317e08 1.02214e07 1.49884e18) Centre of mass: (8.05317e08 1.02214e07 1.49884e18) Orientation: (0.710317 0.703881 2.09457e16 0.703881 0.710317 1.1383e15 9.50012e16 6.61124e16 1) Linear velocity: (0 0 0) Angular velocity: (8.46769e23 4.6018e22 4.04268e07) AMI: Creating addressing and weights between 10320 source faces and 10488 target faces AMI: Patch source sum(weights) min/max/average = 0.988487, 1.34623, 1.0066 AMI: Patch target sum(weights) min/max/average = 0.371348, 1.06694, 0.998123 GAMG: Solving for pcorr, Initial residual = 1, Final residual = 0.00949575, No Iterations 5 GAMG: Solving for pcorr, Initial residual = 0.00827485, Final residual = 0.00827485, No Iterations 0 time step continuity errors : sum local = 6.4601e06, global = 1.53028e09, cumulative = 3.03913e09 smoothSolver: Solving for Ux, Initial residual = 0.797393, Final residual = 1.90207e06, No Iterations 1 smoothSolver: Solving for Uy, Initial residual = 0.177599, Final residual = 7.16774e06, No Iterations 1 smoothSolver: Solving for Uz, Initial residual = 0.193548, Final residual = 4.67921e06, No Iterations 1 GAMG: Solving for p, Initial residual = 0.00855496, Final residual = 3.27126e05, No Iterations 4 GAMG: Solving for p, Initial residual = 0.00194473, Final residual = 4.22478e07, No Iterations 5 time step continuity errors : sum local = 4.88858e14, global = 3.29588e16, cumulative = 3.03913e09 . . . PIMPLE: Iteration 22 forces forces: Not including porosity effects 6DoF rigid body motion Centre of rotation: (8.05317e08 1.02214e07 1.49884e18) Centre of mass: (8.05317e08 1.02214e07 1.49884e18) Orientation: (0.710317 0.703881 2.09457e16 0.703881 0.710317 1.1383e15 9.50012e16 6.61124e16 1) Linear velocity: (0 0 0) Angular velocity: (7.35178e23 3.99535e22 3.50992e07) AMI: Creating addressing and weights between 10320 source faces and 10488 target faces AMI: Patch source sum(weights) min/max/average = 0.988487, 1.34623, 1.0066 AMI: Patch target sum(weights) min/max/average = 0.371348, 1.06694, 0.998123 GAMG: Solving for pcorr, Initial residual = 1, Final residual = 0.00960231, No Iterations 5 GAMG: Solving for pcorr, Initial residual = 0.00827486, Final residual = 0.00827486, No Iterations 0 time step continuity errors : sum local = 6.45894e06, global = 1.51682e09, cumulative = 3.38869e08 smoothSolver: Solving for Ux, Initial residual = 3.51142e06, Final residual = 7.51302e12, No Iterations 1 smoothSolver: Solving for Uy, Initial residual = 1.77977e07, Final residual = 1.77977e07, No Iterations 0 smoothSolver: Solving for Uz, Initial residual = 3.29433e07, Final residual = 3.29433e07, No Iterations 0 GAMG: Solving for p, Initial residual = 2.31852e07, Final residual = 2.31852e07, No Iterations 0 GAMG: Solving for p, Initial residual = 2.31852e07, Final residual = 2.31852e07, No Iterations 0 time step continuity errors : sum local = 2.83004e14, global = 9.88155e16, cumulative = 3.38869e08 PIMPLE: Converged in 22 iterations ExecutionTime = 67.58 s ClockTime = 68 s Courant Number mean: 1.67388e07 max: 2.82459e05 deltaT = 7.19511e06 Time = 1.31939e05 PIMPLE: Iteration 1 forces forces: Not including porosity effects 6DoF rigid body motion Centre of rotation: (8.05317e08 1.02214e07 1.49884e18) Centre of mass: (8.05317e08 1.02214e07 1.49884e18) Orientation: (0.710317 0.703881 2.09457e16 0.703881 0.710317 1.1383e15 9.50012e16 6.61124e16 1) Linear velocity: (0 0 0) Angular velocity: (2.49876e22 1.35796e21 1.19297e06) AMI: Creating addressing and weights between 10320 source faces and 10488 target faces AMI: Patch source sum(weights) min/max/average = 0.988487, 1.34623, 1.0066 AMI: Patch target sum(weights) min/max/average = 0.371348, 1.06694, 0.998123 GAMG: Solving for pcorr, Initial residual = 1, Final residual = 0.00944155, No Iterations 5 GAMG: Solving for pcorr, Initial residual = 0.00827466, Final residual = 0.00827466, No Iterations 0 time step continuity errors : sum local = 7.74685e06, global = 1.88339e09, cumulative = 3.57703e08 smoothSolver: Solving for Ux, Initial residual = 0.855398, Final residual = 2.31223e06, No Iterations 1 smoothSolver: Solving for Uy, Initial residual = 0.208584, Final residual = 6.76758e06, No Iterations 1 smoothSolver: Solving for Uz, Initial residual = 0.226375, Final residual = 6.68791e06, No Iterations 1 GAMG: Solving for p, Initial residual = 0.00386014, Final residual = 2.49145e05, No Iterations 4 GAMG: Solving for p, Initial residual = 0.00107462, Final residual = 6.67368e07, No Iterations 4 time step continuity errors : sum local = 1.29317e13, global = 1.04586e14, cumulative = 3.57703e08 PIMPLE: Iteration 2 . . . Do you have any idea how to do this ? Thanks guys ! Happy Foam 

April 26, 2019, 04:26 

#2  
Member
Ilan
Join Date: Dec 2018
Posts: 37
Rep Power: 3 
Hello, I found a solution : for any data extraction from OpenFoam logs, you can use this small awk script I wrote :
Quote:
f is the variable saved in line. It match the data you need to extract (for me, z angular velocity). 

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foamlog, post processing 
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