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added DIY link
Pointwise can import the solid model and exploit the information it contains about how the surfaces are stitched together. Even when using native CAD files, it is a good idea to check to see if the solid model is watertight. This is carried out in the Create, Assemble, Models panel by selecting the model and clicking Assemble. If the solid model is watertight, there should be a single model (all surfaces green) and zero lamina boundaries (red edges). If the solid model is not watertight, the tolerance can be increased to automatically close the gaps.
Pointwise can import the solid model and exploit the information it contains about how the surfaces are stitched together. Even when using native CAD files, it is a good idea to check to see if the solid model is watertight. This is carried out in the Create, Assemble, Models panel by selecting the model and clicking Assemble. If the solid model is watertight, there should be a single model (all surfaces green) and zero lamina boundaries (red edges). If the solid model is not watertight, the tolerance can be increased to automatically close the gaps.
=Reorganize Surfaces=
Quite often the arrangement of the surfaces created by the CAD software is not optimal for meshing. For example, the body of the filter tube is made up of four surfaces, but we probably only need one surface mesh patch to represent the whole tube. The complementary capability to Pointwise's solid modeling is quilting. Quilting allows the user to redefine the meshing regions from the original CAD surfaces to something more meaningful. In the filter tube example, we want Pointwise to create one surface mesh patch on all four filter tube surfaces. This is accomplished by quilting the four surfaces into one logical meshing region. By not requiring the grid boundaries to follow all the CAD topology, we end up with a simpler grid topology and higher mesh quality.
The quilt assembly feature has the ability to automatically assemble the quilts based on an angle criterion. The angle is defined as angular deviation between the normals of the adjacent surfaces.
=Sources=
=Sources=
[http://www.pointwise.com/theconnector/July-2012/CAD-to-CFD-in-5-Minutes.shtml Adapted from ''From CAD to CFD in Five Minutes: The Complete Story of Meshing a Real Geometry Using Pointwise'']
[http://www.pointwise.com/theconnector/July-2012/CAD-to-CFD-in-5-Minutes.shtml Adapted from ''From CAD to CFD in Five Minutes: The Complete Story of Meshing a Real Geometry Using Pointwise'']
[http://www.pointwise.com/DIY/ DIY Pointwise Instructions]
[[Category: Rockets]]
[[Category: Rockets]]
[[Category:CFD]]
[[Category:CFD]]