
Problem in Multiphase
Good evening,
Hope you are doing well. I have got an issue with a problem for multiphase tutorial. I am not able to solve the problem as the error depicting on the console bar is floating point exceeds. However, I was able to determine the coefficient of discharge for the delta p .5 and 1 bar. Delta p above 1 bar depicting same issues for all case even using optimise relaxation and advanced stabilisation.
The input for our problem is mentioned below,
Solution
Pressure at Inlet: 3.5 Bar
Operating temperature: 288.16 K
Turbulent viscosity ratio: 5
Algorithm used: Coupled
Pressure: PRESTO
Momentum: Second order up wind
Volume Fraction: Compressive
Modified Turbulent Viscosity: Second order up wind
Turbulence models: Spalart â€“ Allmaras
Fluid density: 998.2 kg/m^3
Outlet: Varying
Pseudo transient: On/Off, as elementary while using pseudo transient high fluctuations are seen for problematic cases.
Multiphase
Homogenous Model: Volume of fluid
Formulation: Implicit
Interfacing modelling: Sharp
Volume fraction cutoff: 1e5
Remarks, the case taken here in 2D as to formulate a structural mesh. Mesh data is given below.
Orthogonal quality: 0.99991 (Avg.)
Skewness: 5.9019e003 (Avg.)
No. of elements: 112512
Please go through the attached images for mesh reference. Hope you will understand.
Thanking you,
With regards,
Pratham Chauhan.
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