CAD to SALOME with Structured Boundry Mesh layer
Hello Guys,
I am struggling to get a clean boundry mesh layer on an imported geometry in SALOME. I will try to describe what my starting point is as clear as possible. My geometry is a kind of hydro turbine roughly similar to this one http://www.cbc.ca/polopoly_fs/1.1496...e-852-8col.jpg with the exception that the rotor blades are welded to inside the casing and not to a centered axis. To simulate flow though the turbine i fill the turbine with an cylinder of the correct measures and Bool-Cut the cylinder with the Imported SLT model form Autodesk Inventor to get the "Water"-Volume contained by the turbine. My next goal would be to create a Mesh for the fluid inside the turbine BUT with an structured boundry mesh layer on all walls of the cylinder as well as at the blades. This is how far I get with SALOME: PIC1: INLET MESH: http://oi44.tinypic.com/4tko5k.jpg As you can see the mesh is pretty irregular at the border of fluid mesh to structured boundry mesh. Is there a way to get a sharper blending of those two structures? Also it seems like the viscosious layer stretch factor is not applied. PIC2: BLADE MESH: http://oi44.tinypic.com/28mpas.jpg The Layer at the Blade-Cuts is pretty Messy in my opinion. Can you please help me to get better results? PIC3: OUTLET MESH: http://oi43.tinypic.com/2wejgar.jpg I really do not know why but the Viscosious Layer Hypothesis seems to be completely ignored at the button of my cylinder. Why is that so? How I get these results: Algo-Stack: Hexa_3D, Netgen-2D Hypothesis: Viscosious Layers for Hexa_3D, Layers 4, Stretch factor 1,2 Netgen 1D-2D Parameters: Allow Quadrangles, Optimize Is there a way to get a really cleanly structured boundry Layer out of SALOME stretching into a cylindric geometry? Many Thanks for your help in advance. And Please apologize if me questions are stupid. I am still a newbie to CFD. Regards. Ilja |
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