Learning Forum

[JoaoAlex]

I'm performing a mesh study for a turbomachinery case, and I was wondering which mesh types are Turbogrid capable of generating, like a prism, tetra, quadrilateral, hex ...

[rfblumen]

For the main flow passage, TurboGrid creates quadrilateral elements on 2D surfaces of revolution at different span fractions using a mesh topology based on the type of blading. These layers are used to interpolate the mesh in the span-wise direction, creating 3D hexahedral elements.
For secondary flow passages, TurboGrid creates a 2D mesh composed of quadrilateral elements (inflation layers) and tetrahedral elements (outside the inflation region). These elements are extruded in the circumferential direction to generate 3D hexahedral and prismatic elements.

[JoaoAlex]

,can you please answer a few more questions related to the mesh features in Turbogrid?
Turbogrid creates various types of mesh blocks, right? O, H, C, can I check which one is been used?
For the K-e turbulence model, should the y+ value be greater than 11,06 (read in the CFX Manuals) or greater than 30? I'm running a geometrical optimization, so I cant go for the SST turbulence model as it takes way more time to complete a single CFD case.
Can I specifically change the number of boundary layer mesh points? The turbomachinery that I'm trying to simulate has 5 elements in the boundary layer (as shown in the picture below), is there a problem? In the CFX manual, it says that there should be around 10-15 elements in this region.

[JoaoAlex]

?