[drrbradford]

I'm trying to mesh an axisymmetric slender body (a finless missile) using snappyHexMesh. I have a very high quality .stl file and have modified the motorBike snappyHexMeshDict rather than write from scratch as I'm just getting to grips with openFoam. However, when I run sHM I get a very low quality surface as can be seen in the attached image for the first and second 'timestep' during sHM.

What I would like to know is which parameter in which Dict is it that controls the quality of the surface matching? I would be inclined to say that increasing the grid resolution in blockMeshDict would help. If this is so, is it possible to create a blockMesh cuboid around the missile geometry of high resolution which is contained within a larger domain cuboid? (See attached image)

[drrbradford]

OK, so it looks like I hadn't told sHMDict to refine the surface, only the refinement area.

Before I had:

 refinementRegions
    {
        refinementBox
        {
            mode inside;
	 levels ((0.5 1));
        }

    }

But now I have

 refinementRegions
    {
        refinementBox
        {
            mode inside;
	 levels ((0.5 1));
        }
motorBike
      {   mode distance;  
          levels ((0.0001 6) (0.001 5) (0.01 4) (0.1 3) (0.2 2));
      } 
    }

[sasanghomi]

Hi Daniel ,Have you solved the problem? Have you gotten a high quality surface? Actually I have a problem similar to you!!

Best regards,
Sasan.