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potentialDyMFoam / Problem with pressure calculation (-writep) |
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August 3, 2017, 09:17 |
potentialDyMFoam / Problem with pressure calculation (-writep)
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Anastasios Stampoultzoglou
Join Date: May 2014
Posts: 21
Rep Power: 11 |
Hi everyone,
I am using the potentialDyMFoam solver of foam-extend 3.2 and foam extend 4.0 (created by Prof. Hrvoje Jasak). More specifically, I am using this solver in order to simulate a forced vertical oscillation of a 2D cylinder, in potential flow. When I am running "potentialDyMFoam" (pressure IS NOT calculated) the solver is converging normally: Code:
Time = 1 PCG: Solving for cellDisplacementx, Initial residual = 0, Final residual = 0, No Iterations 0 DICPCG: Solving for cellDisplacementy, Initial residual = 0.0502561, Final residual = 9.27588e-10, No Iterations 127 volume continuity errors : volume = 116.804, max error = 1.07036e-12, sum local = 2.65343e-15, global = 1.96865e-18 Mesh Courant Number mean: 0.000229086 max: 0.00593496 GAMG: Solving for p, Initial residual = 1, Final residual = 8.89102e-05, No Iterations 8 GAMG: Solving for p, Initial residual = 0.0151871, Final residual = 1.29303e-06, No Iterations 8 GAMG: Solving for p, Initial residual = 0.00250083, Final residual = 2.00244e-07, No Iterations 11 GAMG: Solving for p, Initial residual = 0.000674892, Final residual = 5.50806e-08, No Iterations 10 GAMG: Solving for p, Initial residual = 0.000193343, Final residual = 1.81462e-08, No Iterations 11 GAMG: Solving for p, Initial residual = 6.34931e-05, Final residual = 8.87798e-09, No Iterations 9 continuity error = 2.49032e-16 Interpolated U error = 1.16813e-07 mag(U): max: 0.776043 min: 0.021953 ExecutionTime = 40.03 s ClockTime = 40 s Volume: new = 116.804 old = 116.804 change = 9.09495e-13 ratio = -7.77156e-15 Code:
Time = 1 PCG: Solving for cellDisplacementx, Initial residual = 0, Final residual = 0, No Iterations 0 DICPCG: Solving for cellDisplacementy, Initial residual = 0.0502561, Final residual = 9.27588e-10, No Iterations 127 volume continuity errors : volume = 116.804, max error = 1.07036e-12, sum local = 2.65343e-15, global = 1.96865e-18 Mesh Courant Number mean: 0.000229086 max: 0.00593496 GAMG: Solving for p, Initial residual = 1, Final residual = 7.43826e-05, No Iterations 8 GAMG: Solving for p, Initial residual = 0.982517, Final residual = 7.27178e-05, No Iterations 8 GAMG: Solving for p, Initial residual = 0.531479, Final residual = 4.16867e-05, No Iterations 10 GAMG: Solving for p, Initial residual = 0.423949, Final residual = 3.57022e-05, No Iterations 12 GAMG: Solving for p, Initial residual = 0.676612, Final residual = 4.46229e-05, No Iterations 10 GAMG: Solving for p, Initial residual = 0.563837, Final residual = 3.98159e-05, No Iterations 12 continuity error = 7.71835e-13 Interpolated U error = 1.16813e-07 mag(U): max: 0.776043 min: 0.021953 Using reference patch 4 with mag(U) = 0.493921 p + 0.5*U^2 = 0.150531 ExecutionTime = 40.01 s ClockTime = 40 s Volume: new = 116.804 old = 116.804 change = 9.09495e-13 ratio = -7.77156e-15 I would like to ask you if you have experienced the same thing and if yes which might be the reason. Feel free to ask more details about my case. Thank you a lot in advance, Tasos. |
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