# interDyMFoam - change in volume fraction

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 April 27, 2009, 10:46 interDyMFoam - change in volume fraction #1 New Member   Vinay Ramohalli Gopala Join Date: Mar 2009 Location: Netherlands Posts: 13 Rep Power: 9 Hello, I tried running the the case "sloshingTank3D6DoF" in the tutorial under interDyMFoam. I understand that this is a closed domain problem and when I run the case, I see that the volume fraction in the domain is changing every time step!! I have pasted the output for this case for few time steps. Can someone please explain what is happening here?? ************************************************** *** // * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * // deltaT = 0.01 Time = 0.01 solidBodyMotionFunctions::SKA::transformation(): Time = 0.01 transformation: ((0.00993214 0.0235843 0.00796523) (0.999999 (0.00104291 0.000602303 0.000433999))) Execution time for mesh.update() = 0.07 s MULES: Solving for gamma Liquid phase volume fraction = 0.337111 Min(gamma) = 0 Max(gamma) = 1 MULES: Solving for gamma Liquid phase volume fraction = 0.337012 Min(gamma) = 0 Max(gamma) = 1 MULES: Solving for gamma Liquid phase volume fraction = 0.336913 Min(gamma) = 0 Max(gamma) = 1 GAMG: Solving for pd, Initial residual = 1, Final residual = 0.00591554, No Iterations 5 time step continuity errors : sum local = 5.98113e-05, global = 2.86642e-17, cumulative = 2.86642e-17 GAMGPCG: Solving for pd, Initial residual = 0.0591541, Final residual = 1.29214e-09, No Iterations 8 time step continuity errors : sum local = 3.39181e-11, global = 2.8702e-17, cumulative = 5.73662e-17 ExecutionTime = 1.34 s ClockTime = 2 s Courant Number mean: 0.0178644 max: 0.159383 deltaT = 0.01 Time = 0.02 solidBodyMotionFunctions::SKA::transformation(): Time = 0.02 transformation: ((0.0198643 0.0471685 0.0159305) (0.999997 (0.00208633 0.0012037 0.000869254))) Execution time for mesh.update() = 0.07 s MULES: Solving for gamma Liquid phase volume fraction = 0.336914 Min(gamma) = 0 Max(gamma) = 1 MULES: Solving for gamma Liquid phase volume fraction = 0.336914 Min(gamma) = -2.54116e-39 Max(gamma) = 1 MULES: Solving for gamma Liquid phase volume fraction = 0.336915 Min(gamma) = -2.54116e-39 Max(gamma) = 1 GAMG: Solving for pd, Initial residual = 0.188129, Final residual = 0.00119762, No Iterations 6 time step continuity errors : sum local = 2.73703e-05, global = 2.91035e-16, cumulative = 3.48401e-16 GAMGPCG: Solving for pd, Initial residual = 0.0687751, Final residual = 1.39387e-09, No Iterations 8 time step continuity errors : sum local = 2.24666e-11, global = 2.91099e-16, cumulative = 6.39499e-16 ExecutionTime = 2.36 s ClockTime = 3 s Courant Number mean: 0.0178365 max: 0.148186 deltaT = 0.01 Time = 0.03 solidBodyMotionFunctions::SKA::transformation(): Time = 0.03 transformation: ((0.0297964 0.0707528 0.0238957) (0.999993 (0.00313028 0.00180419 0.00130576))) Execution time for mesh.update() = 0.07 s MULES: Solving for gamma Liquid phase volume fraction = 0.336915 Min(gamma) = -2.68208e-31 Max(gamma) = 1 MULES: Solving for gamma Liquid phase volume fraction = 0.336915 Min(gamma) = -8.86794e-34 Max(gamma) = 1 MULES: Solving for gamma Liquid phase volume fraction = 0.336916 Min(gamma) = -3.81862e-30 Max(gamma) = 1 GAMG: Solving for pd, Initial residual = 0.139871, Final residual = 0.00123457, No Iterations 3 time step continuity errors : sum local = 1.68448e-05, global = -4.18923e-16, cumulative = 2.20576e-16 GAMGPCG: Solving for pd, Initial residual = 0.0201855, Final residual = 2.87405e-10, No Iterations 8 time step continuity errors : sum local = 3.50033e-12, global = -4.18868e-16, cumulative = -1.98292e-16 ExecutionTime = 3.34 s ClockTime = 4 s Courant Number mean: 0.0178408 max: 0.140226 deltaT = 0.01 Time = 0.04 solidBodyMotionFunctions::SKA::transformation(): Time = 0.04 transformation: ((0.0397285 0.0943371 0.0318609) (0.999987 (0.00417474 0.00240376 0.00174352))) Execution time for mesh.update() = 0.07 s MULES: Solving for gamma Liquid phase volume fraction = 0.336916 Min(gamma) = -8.91948e-30 Max(gamma) = 1 MULES: Solving for gamma Liquid phase volume fraction = 0.336917 Min(gamma) = -1.30713e-31 Max(gamma) = 1 MULES: Solving for gamma Liquid phase volume fraction = 0.336917 Min(gamma) = -3.99721e-34 Max(gamma) = 1 GAMG: Solving for pd, Initial residual = 0.107624, Final residual = 0.00105195, No Iterations 2 time step continuity errors : sum local = 1.15421e-05, global = 9.4616e-16, cumulative = 7.47868e-16 GAMGPCG: Solving for pd, Initial residual = 0.00677147, Final residual = 4.96459e-10, No Iterations 7 time step continuity errors : sum local = 5.08561e-12, global = 9.46159e-16, cumulative = 1.69403e-15 ExecutionTime = 4.24 s ClockTime = 5 s ************************************************** *********

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