[wassli]

Hi Everyone

I am facing convergence problems with star ccm+ and numerical solution is not converging at all... am using Segregated Solver and Modelling turbulent flow in vertical tube at supercritical conditions.. Thermophysical properties are entered with piecewise polynomials....
For turbulence i am using Realizable Two layer K epsilon model with two layer all y+ wall treatment ..
average Y+ is within viscous sub layer.... i am really worried because i have played with many variables and did not succeed at all...

any help or suggesions will be highly appreciated...

Thanks

[Blanco]

Hi,

what is the Mach number you're simulating? Have you tried with the coupled solver?

[wassli]

mach number in this case is very small i.e. below 0.3

i also tried coupled solver but divergence occured.

[ashokac7]

Try switching off secondary gradients.. You can find them in physics continuum tree.

Sent from my Redmi Note 3 using CFD Online Forum mobile app

[whitemelon]

Originally Posted by ashokac7

Try switching off secondary gradients.. You can find them in physics continuum tree.

Sent from my Redmi Note 3 using CFD Online Forum mobile app

Hi,

Where can I downlod the APP of CFD-Online?

[Blanco]

Originally Posted by whitemelon

Hi,

Where can I downlod the APP of CFD-Online?

Just follow the link...

http://r.tapatalk.com/byo?rid=72961

It's available both in playstore for android and appstore for apple devices