# Axisymmetric Vof

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 August 20, 2002, 01:34 Axisymmetric Vof #1 Turbina Guest   Posts: n/a In 2dd problem Axisymmetric Vof In - Multhiphase Model 2 components - visosus model k-epsilon 2 eqn standard - standard wall functions the solver that it doesn't converge the iter continuity - me from the following mistake: Error: Internal error at line 743 in file 'amgif.c'. divergence detected in AMG solver Error Object: () turbulent viscosity limited to viscosity ratio of 1.000000e+05 in 132 cells. Thanks for your attention. Bey well,

 August 20, 2002, 07:01 Re: Axisymmetric Vof #2 CFD MAN Guest   Posts: n/a Hallo What VOF scheme did you use? It should not have any problem to get converged solution. Start with a smaller time step if you do time dependent simulations. CFD MAN

 August 21, 2002, 01:34 Re: Axisymmetric Vof #3 Turbina Guest   Posts: n/a Multiphase Model Geo reconstruct, Courrant Number 0.25 Thank You

 August 21, 2002, 02:57 Re: Axisymmetric Vof #4 CFD MAN Guest   Posts: n/a I don't see any reason why it doesn't work.

 August 21, 2002, 07:33 Re: Axisymmetric Vof #5 Turbina Guest   Posts: n/a Also System 3DD Real Cilinder Heght 0.2 m Radius 1.45 m Boudary Condition Wall Face External Cilinder. GAS Density 1.225 kg/m^3 Voscosity 1.7894e-04 Poise Melt Density 1187 kg/m^3 Voscosity 2169 Pois Multiphase Model VOF Geo Costructor Primary Phase GAS Secondary Phase Melt Currant Number 0.25 Viscosus Model K-Epsilon 2 eqn –Standard – Standard Wall Function Solution Controls - Force Body Weigted – PISO –First Order Upwind Operation Condition Gravity Y = - 9.81 m/sec^2 Specificed Operatin Density Boudary Condition Wall Diam = 2.9 m - Rotazional Speed 0.816 Rad / sec Relatyve to Adjacent Cell Zone. Region Adaption X MIN = -1.45 m X MAX = 1.45 Y MAX = -1.2 YMAX =-1.45 Z MAX = 0 ZMIN = 0.2 Iterate Time Step Size 0.002 – Number of Step 5 – Max Iteration = 10 Continuity no converge

 August 21, 2002, 18:38 Re: Axisymmetric Vof #6 CFD MAN Guest   Posts: n/a Does it converge in 10 iterations? Whats the convergent criteria? CFD MAN

 August 22, 2002, 15:16 Re: Axisymmetric Vof #7 Turbina Guest   Posts: n/a They are the Iteration max for step, but doesn't converge also with Max Iter = 50. Could question but perhaps depend to type of mesh ? Thank you

 August 22, 2002, 19:12 Re: Axisymmetric Vof #8 CFD MAN Guest   Posts: n/a I am pretty sure that its the mesh quality. I have been using VOF with geo for more than 2 years now, I didn't have any major difficulties. CFD MAN

 August 23, 2002, 14:44 Re: Axisymmetric Vof #9 Turbina Guest   Posts: n/a Does it know pointing to me a few books that treat any problem of Mesh in turbulent regime? Thank you.

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