How can I add/modify 'artificial viscosity' in a volume zone ?
Posted: Tue Mar 31, 2020 4:24 pm
Hello all,
I didn't find a subject on this topic in the forum so I created this one.
I have an internal flow case where I would like to slow down a flow jet entering in a cavity.
I would like to increase the viscosity in a delimited zone up to the jet dissipate to simulate the entry of the jet in a more viscous zone. The fact is I tried head loss volume condition but my case diverges each time I tried, no matter the coefficients are.
I use fast chemistry combustion and standard k-eps in the simulation, maybe there's the heart of the problem and it's incompatible with the head loss condition.
So currently I choose to modify the code and I would like to add more viscosity in the molecular viscosity, like a scale between X1 to X100 in a zone.
Is someone has and idea where to do this in the source code? I'm lost with the structure, I don't understand where is exactly calculated the molecular viscosity.
Thank you all,
Cbarnaud.
I didn't find a subject on this topic in the forum so I created this one.
I have an internal flow case where I would like to slow down a flow jet entering in a cavity.
I would like to increase the viscosity in a delimited zone up to the jet dissipate to simulate the entry of the jet in a more viscous zone. The fact is I tried head loss volume condition but my case diverges each time I tried, no matter the coefficients are.
I use fast chemistry combustion and standard k-eps in the simulation, maybe there's the heart of the problem and it's incompatible with the head loss condition.
So currently I choose to modify the code and I would like to add more viscosity in the molecular viscosity, like a scale between X1 to X100 in a zone.
Is someone has and idea where to do this in the source code? I'm lost with the structure, I don't understand where is exactly calculated the molecular viscosity.
Thank you all,
Cbarnaud.