Week 2 Challenge : Surface meshing on a Pressure valve

OBJECTIVE

To check for the geometric errors in the geometry, perform Topology cleanup accordingly, meshing at different target lengths of 5 mm, 3 mm and 1 mm and comparing the mesh results.

PROCEDURE

1. Import the given model into ANSA software
2. Check for the geometrical errors using the geometry check tool
3. Patch the geometry by resolving all single cons and cracks showed in the geometry check using various tools like Fill Hole.
4. After re-checking the geometry by the geometry check tool and closing the geometry from all the open faces. Mesh target length is allotted as 5 mm and suitable quality criteria and mesh parameters are mentioned
5. Mesh is generated using Free Mesh tool < Visible
6. Save the ansa file after observing the mesh results
7. The above process is repeated for 3 mm and 1 mm target lengths

OBSERVATIONS & COMPARISON

For 5 mm mesh the surface is observed to be rough and the mesh at the spring cannot match the real geometry of the spring

For 3 mm mesh length the geometry is captured in a better way but the surface is not smooth

For 1 mm mesh length the geometry is captured effectively with smooth surface

RESULTS

The mesh is generated with 5 mm, 3mm and 1 mm target mesh lengths. As the mesh becomes finer, it is able to capture the geometry better. The mesh length should be selected in a way that it can capture the geometry well. The target mesh length must be lesser than the geometry dimension.

LEARNINGS

1. Use of tools like fill hole, coons, new etc
2. Geometry cleanup
3. Significance of target mesh length