Week 2 Challenge : Surface meshing on a Pressure valve

OBJECTIVE:-

To clear the topo errors , mesh the model for various target length and to conclude which element size will be the best to mesh.

PROCEDURE:-

CLEARING TOPOLOGICAL ERRORS:-

The following tools are used to clear the topo errors on the wall portion.

• [Not + PID Region and then selected Invert] is used to make visible only the selected portion.
• [going to COONS under surfaces - then selected all the edges and then middle click - then selected ok] is used to fill the empty spaces by creating new surfaces.
• [going to Cut option under faces - ensure whether the heal cut is enable under option list - then selected the two nodes] is used to create the small portion in the surface.
• [going to delete option under hot points] is used to delete the unwanted hot points.
• [going to fill hole under cons - the selected the edges - clicked on ok] is used to fill the empty space on the same surface itself (it won't create seperate surfaces).

The following tools are used to clear the topo errors on valve seal and valve springs.

• [going to intersect option under faces - then selected the first surface by middle click and then the second surface by middle click] is used to intersect the two selected surfaces.
• [going to universal delete option - selected the unwanted surfaces by using PID Region option and then middle click] is used to delete the surfaces.
• [going to COONS under surfaces - then selected all the edges and then middle click - then selected ok] is used to fill the empty spaces by creating new surfaces.

ASSIGNING PID'S:-

• Intially the model is in single PID to seperate it by [going to set PID under faces - selecting faces / shells - then selected the surfaces that need to be seperated]

- First the wall is created and coloured it in skyblue colour.

- Next the valve seal is created and coloured it in pink colour.

- Next the valve spring is created and coloured it in blue colour.

- Next the outlet is created and coloured it in yellow colour.

- Finally the Inlet is created and coloured it in lavendar colour.

CREATING SURFACE MESH:-

• create a surface mesh with spot mesh .

OBSERVATION:-

1. FOR TARGET LENGTH OF 5 .

• Trias formed is less.

2. FOR TARGET LENGTH OF 3.

• tria formed more .
• fine meshing than target length size 5 .

3. FOR TARGET LENGTH SIZE 1.

• Trias formed is more.
• finest meshing in all these three cases.

CONCLUSION:-

Meshing size target length 1 is best for meshing .