[kev11]

Hello,

I posted a similar question earlier, but I am still having trouble. First, I have an inviscid simulation of an aircraft at hypersonic speeds. I am using AMR to refine areas where the shock should be by using a pressure criterion. However, the AMR is refining areas on the vehicle's surface (fuselage, vertical wing), which is unnecessary and increases my cell count.

I have been using a function called "distanceToSurface" to calculate the distance from every cell to the fuselage, for instance. I then used a boolean statement that said if the cell is less than 0.001 m away from the fuselage, then do not refine there (return a 0). But when I do that, I lose cell refinement on the tip of the fuselage, where the shock is located. I also tried setting the distance boolean to not refine areas where the distance is 0, but that does not work either. Is there any other ways I can tackle this problem??

[f-w]

AMR does not operate on surface mesh, but it does have a check box for refining prism layers (which is disabled by default, as it significantly increases cell count). You're defeating the purpose of shock capturing if you force AMR off near body, where shocks are formed. Sounds like you need to tweak or change your AMR function to behave as you wish. Other than "distanceToSurface", you can also experiment with the "insidePart" operator. This operator returns a value of 1 in cells inside an arbitrary surface/part and 0 elsewhere, notation is insidePart(@GeometryPart("part_name")), but I wouldn't enclose your body as it defeats the purpose of shock capturing.