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-   -   Dimpled chanel convergence (https://www.cfd-online.com/Forums/cfx/216491-dimpled-chanel-convergence.html)

Marcin123 April 9, 2019 15:38

Dimpled chanel convergence
 
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Hi everyone,
I want to make simulation of flow inside dimpled chanel. My problem is that it converge only for relatively low velocities(6-10)m/s. My solution does not converge if velocities are higher, i tried from range (30-40) m/s. Here are my bonduary conditions :
Domain Default domain Air Ideal Gas
Reference Pressure 1 atm,
Heat Transfer THermal Energy
Turbulence Model SST
Wall function Automatic,
Inlet
Normal Speed, and Static Temperature
Outlet:Static Pressure 0 atm,
Dimpled Surface No slip wall, temperature 45 C,
Vertical walls:Transation Periodicity,
Rest of the geometry is treated as adiabatic no slip wall,
I have no idea what is wrong, maybe my bonduary conditions are not appripriate, or Should change turbulence model?
I would be grateful for any help.

ghorrocks April 9, 2019 18:37

FAQ: https://www.cfd-online.com/Wiki/Ansy...gence_criteria


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