Week 2 Challenge : Surface meshing on a Pressure valve

Objective: To check for the geometrical errors and perform topology cleanup. set three different target lengths (1,3 and 5mm) as three different cases and mesh the model.

Procedure

• Import geometry
  
  
• Perform geometry checkup.
  
  
  select single cons to visualize on model.
  
  in the above figure white marked cons are single entities.
  
  single cons in wire frame.
• To fix these single cons errors create new faces.
  select New>select COONS>Select Loops mode>Select cons. it will automatically select all cons which are in loops.
  
  Now middle click to apply face on cons. It will show a preview select the required face.
  
  
  
  
• Similarly create new faces for the other single cons.
  
  
  
  
  
• After clearing all single cons errors perform again geometry checkup.
  
  After the geometry checkup we found only triple cons. We can ignore this error.
  
  
• Now assign PID's.
  Inlet
  
  Outlet
  
  Body
  
  Spring
  
  Base surface
  
  Valve head
  
  Column
  
  Overall PID's
  
  
  
• Now assign mesh length (perimeters and macros) as 5mm.
  
• Now set mesh parameters
  Target length `->` 5mm
  Minimum length `->` 3mm
  Element type `->` Tria
  
• Set quality criteria
  minimum length `->` 3mm
  maximum length `->` 7mm
  
  
  Meshing
• Case 1 target length 5mm
  No. of Trias `->` 8788
  Body mesh
  5258 trias
  
  Inlet mesh
  676 Trias
  
  Outlet mesh
  298 Trias
  
  Spring mesh
  388 Trias
  
  in the above figure we can observe that spring has not meshed properly, because thickness of spring(3.38mm) is less than our target length(5mm).
  Valve head mesh
  1176 Trias
  
  Base surface mesh
  82 Trias
  
  Column mesh
  910 Trias
  
  Overall meshed body
  8788 Trias
  
  
  
  
• Case 2 Target length 3mm.
  Body mesh
  14364 Trias
  
  Inlet mesh
  1878 Trias
  
  Outlet mesh
  824 Trias
  
  Spring mesh
  1270 Trias
  
  Base mesh
  240 Trias
  
  Valve head mesh
  3192 Trias
  
  Column mesh
  2100 Trias
  
  Overall mesh
  23868 Trias
  

• Case 3 Target length 1mm.
  Body mesh
  124736 Trias
  
  Inlet mesh
  16824 Trias
  
  Outlet mesh
  7590 Trias
  
  Spring mesh
  10552 Trias
  
  Base surface mesh
  2110 Trias
  
  Valve head mesh
  28411 Trias
  
  Column mesh
  19239 Trias
  
  Overall mesh
  209462 Trias
  
  
  
  

Conclusion

From the above results we can conclude that as we decrease the target length number of elements increases.