[abgoel363]

Hello Everyone,
I am working with Ansys 19.1 and got the divergence in AMG Solver: Temperature.
I am using Energy and K-Epsilon Realisable standard wall fn. models.
I have different materials in the model.

My mesh detailsomain Extents:
x-coordinate: min (m) = -4.450000e-02, max (m) = 1.550000e-01
y-coordinate: min (m) = -1.404000e-01, max (m) = 1.125000e-01
z-coordinate: min (m) = 0.000000e+00, max (m) = 4.000000e-02
Volume statistics:
minimum volume (m3): 5.772733e-14
maximum volume (m3): 2.075890e-08
total volume (m3): 1.036981e-03
Face area statistics:
minimum face area (m2): 2.157978e-09
maximum face area (m2): 1.748371e-05
Mesh max. skewness is 0.89 avg. is 0.28

simulation is running good when I run it without energy equation. but it is not working with energy equation.
I have also tried to reduce relaxation factor for energy in which it is showing divergence after 8 iterations.

I am using SIMPLE scheme, Green-Gauss node based with second order upwind in all.
All the control parameters are default.

when I am using it in Serial mode than it is converting to parallel automatically so I am using it Parallel with zero processes.

Please Help!!
Let me know if need more details.

Thankyou very much in advance.

[rupak504]

These kinds of errors mostly occur when you have taken some unphysical condition in your problem.

[abgoel363]

Ok Thanks, Can you please elaborate that how can I resolve this unphysical Boundary conditions issue?? @Rupak504