[goli92]

Hello friends,

I am doing three dimensional simulation of heat transfer for flow through uniform micro channel with air as a working fluid.

Pressure based solver/steady
I have switched on the energy equation..
convergence criteria is 10^-6
SIMPLE algorithm,
Pressure-second order
Momentum and energy-QUICK

but the solution was never converged...please help me if I did any mistake regarding the simulation with air as working fluid....appreciate your help

Thanks in advance.

[annan]

Dear goli92,

What do you mean by the solution never converged ? did you get any errors ? AMG divergence ?

Regards,
Annan

[goli92]

Originally Posted by annan

Dear goli92,

What do you mean by the solution never converged ? did you get any errors ? AMG divergence ?

Regards,
Annan

Thanks for prompt response

No errors but residuals are just oscillating....

for example continuity residual is like from 1e-1 to 9.8e-2 to 1e-1...

hope I am clear with my problem...if any clarification needed please let me know...any

[annan]

What about your mesh ? quality and cell size ?

Have you tried running the simulation in unsteady ?

[goli92]

Originally Posted by annan

What about your mesh ? quality and cell size ?

Have you tried running the simulation in unsteady ?

Problem solved...I need to further refine the mesh....minimum quality is 0.21...and flow condition is steady state...

Thanks for your response.