Learning Forum

[Cephied]

Hello,

I am running a simulation of a half cylinder in a hyper-sonic flow. My goal is to resolve the heat flux along the boundary of the cylinder wall. Consider this case to be a hollow cylinder. A contour of the mach number is given here for visualization of the problem. The simulation has ran for a total of 40K iterations at the time of this post.

[Rob]

Check the flux result every some iterations, you may have a transient effect in the system.
Why are you including volumetric reactions? Unless you're going to be reacting the air I'd just use "air" to save on cpu load.

[Cephied]

Thank you for the reply! Volumetric reactions are included because they are necessary for our goals with the simulation. Currently I am trying to resolve the heat-flux on the wall boundary, but this is only a PART of the total goal for this project.
When you say transient effect...do you mean that the simulation has yet to reach steady-state (AKA run longer)?

[DrAmine]

You might turn on Two-Temperature Model for Hypersonic Flows. Regarding the noise: that might be an indicator of unsteadiness. You might run unsteady or turn data sampling for steady state. There are some more way's to remove noise when it comes to heat transfer (only pressure based).