Week 2 Challenge : Surface meshing on a Pressure valve

                              Surface meshing on a Pressure valve

Aim: Check the geometrical errors on the pressure valve and perform topology cleanup. Meshing it for three target lengths.

Objectives: Mesh it for target lengths 1mm, 3mm, and 5mm.

Procedure: 

• First, observe the geometry and get familiar with it. Note down any errors.
• Using checks from the tools bar, find out all the errors present in the geometry.
• 
• As we can see in the image, the highlighted entities are geometrical errors found in the geometry, which are single cons.
• Using the fill hole, new from faces group, and various options clean the errors by creating new entities for the single cons.
• 
• In CFD analysis, the model should be closed without any openings, here we are closing all the openings. This will create triple cons which are acceptable and can be ignored.
• check for any macros which are very small and could cause a problem for meshing, while the meshing length is smaller than the macro, using a cut function from the faces group clears those cons.
• The next step is to assign the PIDs to various entities.
• 
• For meshing, go to mesh utilities and set the minimum and maximum target lengths as well as the element type.
• Then go to the mesh module and set the perimeter and macro length with the target length.
• Using the mesh group, select spot mesh and select the entities to mesh.
• Verify if all macros have meshed.

Conclusion: 

The pressure valve is meshed for 3 target lengths. 

Looking at the mesh for the pressure valve head and spring we can observe the mesh capturing the CAD features.

In all three cases, 1mm is giving a good result than the other 2 cases. The valve head surfaces are captured well and the spring is also meshed properly compared to the other 2 cases

5mm	3mm	1mm