Week 2 Challenge : Surface meshing on a Pressure valve

Aim: To setup an 1mm,3mm,5mm Mesh on a Pressure Valve using ANSA software

Procedure:

• Open the document in ANSA software
• Check the geometry to have any errors.
• In order to check other errors, go tools tab- click on checks- click on geometry- go to ANSA checks- select geometry visible- select single cons- execute.
• We can see there are huge number of errors due to the openings in the valve so we need to minimize by closing it by creating a new surface on it.
• To close the openings in the valve is done by adding the surfaces to that opening by using an Face new option.
• Select new in this we can generate new surface by 4 different methods

1. Existing surface
2. Planar
3. Fitted
4. Coons

• By selecting existing surface either by selecting each single cons or by selecting all cons by using loop option
• After selecting single cons or loop, we need to select the neighbor surface option and doing middle click will generate a new sketch
• Similarly, from other options also we can create a new surface as well
• One more option is fill hole option in cons utility, select the diameter or open surface by selecting the single cons or by loop we can create a new surface.
• But sometimes the surface is not creating a good surface because the nearby surface is curvature the new surface is also create some curvature and won’t get the proper surface. In that situation

• we should avoid such option and move for the other types.
• In the base of the valve due to the improper drawing width of the circle the surface creating is not good so we should check the drawing and should create the surface.

• After creating surface to all open surfaces again check for any errors for single cons, double cons and triple cons.
• Triple cons are the only errors we will get after completing the filling up of blank surface created on the valve, but triple cons are need for the valve so these errors are negligible.
• In order to mesh of 3mm or 5mm in the pressure valve some nearby cons are making some errors due to insufficient gap between them so we need to delete those lines before meshing, sometimes these lines won’t be visible so by zooming it we need to delete it.

• After this we should create the model property Id’s in property manager with different names like inlet, outlet, body, valve head, spring, column, base.

• After completing placing names, we should apply each id to the model as per the names provided
• After completing assigning the id’s we should apply the mesh by giving proper mesh length and quality criteria
• First in material property we should give mesh target length and in quality criteria we should give the min length and max length
• After this by selecting the model, we should give the mesh parameter and macros.
• When giving the meshing parameter, macros, target length all should be give the same size and when giving the mesh min length also we should take care about this before applying the mesh to the model.
• For example, if we need to mesh for 1mm the min length should be of 0.5 and the max length should be 2mm. by giving this type we will get an exact mesh as we required.

• After giving the meshing parameters we should apply the mesh for the model by selecting proper model ids by hiding the other ids in the property manager. If not the mesh will generate as per our requirements

Learning outcomes:

• By using topo clean up on geometry, we are able to fill the surface by using new face by using existing surfaces, planar, fitted, coons and fill hole options
• Also, we are able to delete the smaller in between lines which are disturbing the mesh generation for the higher mesh lengths.
• We are able to generate the property ids to the model in property manager
• We can give the mesh properties in different properties like mesh parameter quality criteria.
• We are now able to generate the proper mesh without having any errors on the pressure valve

Result: Mesh has been generated on the pressure valve for different target lengths of 1mm, 3mm, and 5mm on the model

Conclusion:

Though we are able to generate the mesh on the model, we see that for the higher mesh length on the spring and valve head it is very poor grid generated on these surfaces and we can’t able to see proper curvature on the spring and pressure valve.

1mm mesh

3 mm
5mm

And also, for higher target length the nodes generated are very small but when we are generating the mesh target length of lower length the model is very accurate and the nodes generated are very high.

When compare to 5mm and 1mm mesh target length, 1mm mesh length case gives the best accuracy model for analysis.

Aim: To setup an 1mm,3mm,5mm Mesh on a Pressure Valve using ANSA software

Procedure:

• Open the document in ANSA software
• Check the geometry to have any errors.
• In order to check other errors, go tools tab- click on checks- click on geometry- go to ANSA checks- select geometry visible- select single cons- execute.
• We can see there are huge number of errors due to the openings in the valve so we need to minimize by closing it by creating a new surface on it.
• To close the openings in the valve is done by adding the surfaces to that opening by using an Face new option.
• Select new in this we can generate new surface by 4 different methods

1. Existing surface
2. Planar
3. Fitted
4. Coons

• By selecting existing surface either by selecting each single cons or by selecting all cons by using loop option
• After selecting single cons or loop, we need to select the neighbor surface option and doing middle click will generate a new sketch
• Similarly, from other options also we can create a new surface as well
• One more option is fill hole option in cons utility, select the diameter or open surface by selecting the single cons or by loop we can create a new surface.
• But sometimes the surface is not creating a good surface because the nearby surface is curvature the new surface is also create some curvature and won’t get the proper surface. In that situation

• we should avoid such option and move for the other types.
• In the base of the valve due to the improper drawing width of the circle the surface creating is not good so we should check the drawing and should create the surface.

• After creating surface to all open surfaces again check for any errors for single cons, double cons and triple cons.
• Triple cons are the only errors we will get after completing the filling up of blank surface created on the valve, but triple cons are need for the valve so these errors are negligible.
• In order to mesh of 3mm or 5mm in the pressure valve some nearby cons are making some errors due to insufficient gap between them so we need to delete those lines before meshing, sometimes these lines won’t be visible so by zooming it we need to delete it.

• After this we should create the model property Id’s in property manager with different names like inlet, outlet, body, valve head, spring, column, base.

• After completing placing names, we should apply each id to the model as per the names provided
• After completing assigning the id’s we should apply the mesh by giving proper mesh length and quality criteria
• First in material property we should give mesh target length and in quality criteria we should give the min length and max length
• After this by selecting the model, we should give the mesh parameter and macros.
• When giving the meshing parameter, macros, target length all should be give the same size and when giving the mesh min length also we should take care about this before applying the mesh to the model.
• For example, if we need to mesh for 1mm the min length should be of 0.5 and the max length should be 2mm. by giving this type we will get an exact mesh as we required.

• After giving the meshing parameters we should apply the mesh for the model by selecting proper model ids by hiding the other ids in the property manager. If not the mesh will generate as per our requirements

Learning outcomes:

• By using topo clean up on geometry, we are able to fill the surface by using new face by using existing surfaces, planar, fitted, coons and fill hole options
• Also, we are able to delete the smaller in between lines which are disturbing the mesh generation for the higher mesh lengths.
• We are able to generate the property ids to the model in property manager
• We can give the mesh properties in different properties like mesh parameter quality criteria.
• We are now able to generate the proper mesh without having any errors on the pressure valve

Result: Mesh has been generated on the pressure valve for different target lengths of 1mm, 3mm, and 5mm on the model

Conclusion:

Though we are able to generate the mesh on the model, we see that for the higher mesh length on the spring and valve head it is very poor grid generated on these surfaces and we can’t able to see proper curvature on the spring and pressure valve.

1mm mesh

3 mm
5mm

And also, for higher target length the nodes generated are very small but when we are generating the mesh target length of lower length the model is very accurate and the nodes generated are very high.

When compare to 5mm and 1mm mesh target length, 1mm mesh length case gives the best accuracy model for analysis.

***( i have attached the word file of the images included along with the detailed report)