As a density-based solver, HiSA is best used at Mach numbers > 0.3. A pressure-based compressible solver such as rhoSimpleFoam/rhoPimpleFoam would probably be best here.
Dual timestepping with local timestepping is used to converge the steady state solution. The pseudo-timestep used for this has no relation to actual time and is automatically computed to converge as quickly as possible.When having a look at fvSchemes, there is the word „rPseudoDeltaT“.
Is Hisa a „pseudo-transient“-method? If so, how must I interpret the iteration-steps?
@Oliver: a tutorial about hisa would be sooo nice.
The mesh shown was generated with different meshing tool to cfMesh (Hexpress Hybrid I think). However your mesh looks OK to me. Have you tried selecting the symmetry plane and un-setting boundary layers on that patch?thschrader wrote: ↑Fri Oct 05, 2018 5:12 pm
I am trying to rebuild the basic-finner tutorial with FC.
http://hisa.gitlab.io/archive/asc/basic ... inner.html
How can I generate the nice mesh (or a mesh closed to this)
you used in the tutorial? I have set a basic element-size of 300 mm
(the cube in the corner) and 3 refinement boxes (refinement level 0,5 each box)
and at least a surface refinement of 0,2 with 5 boundary layers. As a start.
Meshing works, but the boundary-layers are located wrong.
No special order needed.According to the uav-tutorial: must I first set the surface refinement of
the body and after that the volume refinement? Is there a special order needed
of the mesh-refinement objects in the model tree?
I used a finner with a diameter of 200 mm and the dimensions
from the tutorial.
No, how can I do this in the GUI?
I was thinking you could add the symmetry face as a refinement region and unselect boundary layers (or set them to 1), but I don't think that will make a difference.
Try removing and re-adding the references in the mesh region object - if the geometry changes, the numbering will change. The cylinder works OK for me. However, cfMesh will often continue boundary layers onto adjacent patches (probably depending on feature angle), so this behaviour might be unavoidable depending on geometry.I have the same problem when using a cylinder. The boundary layer elements
are located correct, when the cylinder is as long (or longer) than the cube.
When the cylinder is inside the cube, the boundary elements are located wrong.
I experimented hours but cant find the reason.