choked flow
 

Hi everybody: I am simulating a choked gas flow (hydrogen) released from a hole up and going downward. Viscous model chosed : rng-kepsilon. The segregated solver is used. The boundary condition for the flow inlet is mass flow rate with gauge pressure of 200000 Pa. This is the first time that this problem happens to me: I get different steady state results depending on the relaxation factors values?? Even the transient state values up to 10 seconds are diferents from one run to another. Am I doing something wrong? Plaese advise

Re: choked flow
 

Dear

let me know, can segregated solver be used for compressible flow. i donot think so. You must opt the coupled solver

Ejaz Ahmed