Week 2 Challenge : Surface meshing on a Pressure valve

Aim: To mesh the model with Target length of 1mm, 3mm and 5mm by considering the element type as Tria by checking the geometrical errors and topology cleanup accordingly

Procedure:
Step 1:Open the model in ANSA.
Below image shown is when the model is opened in ANSA
As there is lot of patch issue in the model means single cons are available in it

To identify the presence of singe cons in the model, Deselect the double cons and triple Cons from the model and also deselect the shadow mode. Image show below




Step 2: Now using Face--> New option --> Coons / Existing Surf, select the patch faces to fill the face in in to avoid the geomteric errors.
Also use Fill hole option to fill the surface in the part by selecting the patch entities in the part, then only single cons can be updated into double cons, means Topo errors can be resolved





By using these process, geometric errors can be resolved.

Step 3: After this, select Checks --> Geometry, where we can find the errors to be resolved. After following the above process, the list of errors shown are related to triple cons which are acceptable (Triple cons is necessary for that face in the model)


Step 4: Then create a PID's respective of the face seperately

Select PID Properties and Right click --> New --> Enter the name of PID and click OK to create a new PID (Follow the steps based on the reqiurement)
Then assign the PID's to the respective faces accordingly by selecting the desired PID and then right click --> Assign and slect the respective face from the model.

Now the PID's assigned to the model






Step 5: After this, model need to mesh absed on the obejective of task (Target length of 1mm,3mm and 5mm seperately with element type of Tria)
CFD meshing will be used for the model. Using mesh paramter,select the Target length Min and Max and then select the Spacing where perimeter and macros will be defined.
Then select CFD meshing --> Visible, from mesh geometry deck to mesh the whole part.

Step 6: Do the same step 5 for three different case of Target length.

Comparatively, Target length of 1mm will have more accuracy than other two lengths. One of the easy way to find out is the spring face, indeed the target length of 3mm and 5mm is more than the actual perimeter length of the model,so it meshes with less accuracy. But in 1mm mesh, spring face looks finer and have a proper mesh.
Mesh of 1mm target length with Tria element type is shown below