# interDyMFoam - change in volume fraction

 Register Blogs Members List Search Today's Posts Mark Forums Read 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: 15 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 ************************************************** *********  Thread Tools Search this Thread Show Printable Version Email this Page Search this Thread: Advanced Search Display Modes Linear Mode Switch to Hybrid Mode Switch to Threaded Mode Posting Rules You may not post new threads You may not post replies You may not post attachments You may not edit your posts BB code is On Smilies are On [IMG] code is On HTML code is OffTrackbacks are Off Pingbacks are On Refbacks are On Forum Rules Similar Threads Thread Thread Starter Forum Replies Last Post [blockMesh] BlockMesh FOAM warning gaottino OpenFOAM Meshing & Mesh Conversion 7 July 19, 2010 14:11 paean OpenFOAM Running, Solving & CFD 0 November 14, 2008 21:14 mike CFX 1 March 19, 2008 07:22 SSL FLUENT 2 January 26, 2008 11:55 [blockMesh] Axisymmetrical mesh Rasmus Gjesing (Gjesing) OpenFOAM Meshing & Mesh Conversion 10 April 2, 2007 14:00