Week 2 Challenge : Surface meshing on a Pressure valve

Objective – surface meshing of the pressure valve using the ANSAV22.1.3.

Introduction -Pressure valves are designed to open at a normal pressure and discharge fluid until the acceptable pressure drops take place.

Here the pressure valve consists of many parts such as inlet, outlet valve, main body, pressure head, a spring attached column and a base to support the valve.

In ANSA software we are going to perform a PID vice meshing on a overall valve.

Procedure- For the complete meshing I am going to show the step wise work in the bullet form.

• Topo- topology of the surface
• Check< geometry check<geometry visible enable, here we need to check for each and every surface for single con, double con, crack, overlap surface, collapsed cons, unchecked face and the unmeshed macros.
• Single con- connected with only one surface (while we are checking for the geometry we need to ensure that our overall module do not j=have any type of single face because then we will not be able to generate the mesh.
• So our first task is to identify all the single con over the surface and fill the gap by patching surface, all the single cons will be highlighted with red colour over the surface.
• To do this we call also turn off all the double cons triple cons cross hatch and after pressing cntrl +shift we will have our all the single cons over the screen.
• To patch all the single cons we can do this under the topo mode> face>new face>existing surface>face on which new face is needed>middle click.
• Secondly we can do this by coons option >loop selection>select the loop>accept the preview.
• Third option fitted>select the loop>con> select from multiple preview>middle click
• (entities only – select only entity, Loop select loop of entities)
• Fourth option>planner > patch the flat surface.
• Surface> fill hole> cons > select the hole / fill diameter> middle click.
• Universal delete can delete the anything on the surface.
• Control +shift < wireframe mode> (double click to select any entities in the wireframe mode)
• If we have triple con over the surface it is not a problem, we just need to make sure is it really necessary?
• Our second task is to remove all the smaller surface over the design as if the dimensions of the small surface must not be less than the mesh length.
• Face<cut<zoom in> delete the line to make it a whole surface.
• PID – product I’d manager and view.
• PID> new>P shell> name> change colour accordingly for every body>assign PID’s> APPLY> SELECT CROSS HATCH> Hide assign surface> select multiple surface together> select PID.
• PID region to select the surface according to the region wise.
• Lock option if we have locked the view then even after clicking the all view button it will show us the locked part only, means the surfaces which is locked earlier will show only.
• Here we need to break the connection between the upper and lower column to assign the PID
• Properties pick option enabled.
• Neibhg 1^st option will show us the very near to that particular surface.
• If there is any unassigned PID available delete the extra unused PID.
• FIT in will show us the fit view for our surface.
• Undelete will show us the previously deleted surface with the white line, we can retrieve any of the previously delete surface.
• Compress option will be used to delete the particular PID completely.
• Mixed colour will show us the glitch over the surface, that there could be the surface overlap.
• Set the quality criteria < min 3 < max 7
• Perimeter -5
• Macro-7
• Mesh parameter- average to 5
• Mesh generation > spot mesh> tria> apply.

Learning output- Here I have got some idea about many other useful tools of ANSA and also used them for the successful generation of the mesh over the pressure valve.

The tools were as follows

1. Singe coons identification
2. Wireframe mode
3. Fill the surface/ surface patch.
4. PID view and PID generation
5. PID assignment
6. FIT, compress, undelete.
7. Lock view
8. Mesh quality
9. And mesh generation.

conclusion- performed the mesh generation over the 3-d pressure valve after assigning each surface with the particular different PID.

The mesh length is the main quantity here as the mesh length must be as small so the more accurate the surface geometry will be.

As the pressure valve works over different pressure head so its function and the effect of fluid over inlet and outlet can be understand here by assign them with different materials and PID’s its performance can be accurately determined here.