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Boundary condition for flow through CD nozzle

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Old   December 4, 2019, 23:39
Default Boundary condition for flow through CD nozzle
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hello everyone,
I am simulating the arc in CD nozzle. the boundary conditions are given as follows:
inlet- guage total pressure 10 bar & 300k
outlet - guage static pressure 3 bar & 300k
cathode - current density 6.5e+07 A/m2
anode - is kept at zero potential

i have prepared UDF code for properties of working fluid and sources and that works fine for other problems, hence no issue with UDF.
but i think, i'm doing some mistake during case setup.
and due to that error comes as
DIvergence detected in AMG solver: Temperature

to get rid of this i've tried
1) using reduced values of URF
2) replace existing mesh with fine and good quality mesh
3) using coupled solution method instead of SIMPLE
immeddiate help will be greatly appreciated.
thanks is offline   Reply With Quote


arc simulation, boundary condition, compressible flow, divergence amg solver

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