Week 2 Challenge : Surface meshing on a Pressure valve

AIM:
Perform topology cleanup for the pressure valve and mesh the model with different mesh length-1mm,3mm,5mm respectively

OBJECTIVE:
To surface mesh the pressure valve with different mesh lengths and observe the difference in the quality of mesh

PROCEDURE:
1.First topological clean-up is done.It includes patching missing surfaces and eliminating overlapped faces.(glitchings visible in PID mode).

2. Removing the intersection between the surfaces using Intersect function.

3. Small surfaces should be avoided.Using cut and right click ,cut surfaces can be removed.

4.PID segregation is done for facilitating better meshing control.

5.Target length for the mesh is dependent on many factors for eg.dimension of the component etc.

6.Target length is provided through Mesh parameters option.General mesh,first order tria elements are used.Target length is given according to different cases.

7.Perimeters (length and macros) option are set according to the target length for the different models.

7. Spot mesh generation algorithm is used in this scenario to get the mesh for the model.

8.Three different mesh lengths are compared.

LEARNING OUTCOMES:

1.Methods of new surface generation learnt(Planar,Fitted,COONS,existing Surf).

2.Length of CONS should be same for the uniform surface generation.Wireframe mode(Ctrl+shift),boolean operations.

3.In CFD we want models to be closed volumes.

4.Small surfaces should be avoided.It can cause error during meshing due to unmatched target length and surface dimensions.

5.Surface meshing basic procedure learnt.Setting the quality and meshing criteria process.

6.PID segregation learnt.

7.Spot mesh generation algorithm.

RESULT:
Three different models with three differnt mesh lengths achieved(1mm,3mm and 5mm respectively).

By thumb rule finer the mesh,better the solution in the next solver stage.But it comes with a rider,as it takes much longer solver processing time and memory.

Hence ,depending on the viability of the problem and component smallest dimension or resolution length,target length for the meshing should be decided.

CONCLUSION:

Surface meshing process implemented for the pressure valve model.It's a pre-requisite before volume meshing.We got to learn basic meshing process and quality criteria settings.