# Divergence detected in AMG solver: temperature -> Increasing relaxation sweeps!
Hi all,
I'm a novice at FLUENT, and i'm having trouble getting my solution to converge. I'm trying to do a heat transfer analysis on a 3D mesh, and I keep getting this error: # Divergence detected in AMG solver: temperature -> Increasing relaxation sweeps! I've tried changing the URF and the limit of the temperature. Any ideas? |
try to reinitialize the solution, using more physical values, espacially for turbulent variables. you can check up turbulent viscosity ratio after initialization, it should not be too large.
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dirvegen detected temperature
Hi,
I have the same problem. The project is about super sonic flow over a surface. we have the Tu%= 0.1. the speed of M=1.4 the gauge pressure is = 771643.9 Errors : when the solution initialized it shows: turbulent viscous ratio limited in some cells absolute pressure limited temperature limited can some one suggest me the solution. |
pastarox try :
solution controls -> advanced -> set cycle type to F cycle .. Giving non physical source terms / boundary conditions may also cause it .. i had the same a coupe of times |
Abhya, Can you explain what is non physical scource tearm. The changed cycle type is F-cycle but not working.
Now i'm getting absolute pressure limited.. can some one direct me or tell me why i have the problem. I checked my grid it look good too.. |
Quote:
For example : I had a mass source term and an energy source term which depends on the mass source term as: Energy source= (-mass source)*latent heat I had forgotten the -ve sign earlier and this resulted in the error as yours... |
I m also new to CFD when i do the compute solution the it always shows divergence detected error.
i m using following boundary conditions: 1) velocity inlet with velocity 50.37m/s and temperature 303k 2) pressure outlet with atm. pressure 3) energy equation on 4) constant heat flux on wall 1400W/m2 |
# Divergence detected in AMG solver: temperature -> Increasing relaxation sweeps!
hello friends
I getting this error: # Divergence detected in AMG solver: temperature -> Increasing relaxation sweeps! I check mesh and because of pressure-base solution I cant change relaxation factor and also change solution control but it didn't work please help me |
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