Week 2 Challenge : Surface meshing on a Pressure valve

Aim: To perform the geometrical errors , Topology cleanup & three different target lengths of 1mm ,2mm,3mm as three different cases and generate the mesh for given model. 

Procedure: 

Gate valve geometry  is  imported to ansa. check for geometry error through the checks select the geometry . select the single cons and necessary selections then click on execute . it displays the all geometry  error.

Geometry imported.

Geometry error are generatred .

Topo clean up for the single cons generated by geometry checks . select the new option from faces menu to surface generation. Enable the loop option from below menu tab , it will help to select for the sinlgle selection for all cons  .if select the ENT option, it select the one con only.

Other option we have for closed cons are the TOPO-->CONS-->FILL HOLES --->SELECT THE CONS ---->CLICK MIDDLE BUTTON in mouse. it will generate surface.

creating the surface for holes in geometry .

Now we can delete the nearest cons which  intercepet the will meshing the surface. 

TOPO-->FACES-->CUT --->RIGHT CLICK  on the selected cons. it will turn in to pink line .

creating the PIDS from the properties options for the given pressure value. by keeping the selection pid region wise, using NOT enable option for the required selection component for different PIDS can assign . 

given all PIDS to pressure valves.

Applying the meshlength 1mm for the entire model.

given the mesh criteria of min -0.25 ,max-1mm.

mesh parameters .

 

Applied the lengths and the marcors 1mm length.

generating the mesh on the entire bodyby using the option spot mesh via visble option.

Applying the 3mm mesh for geomentery.

By using the measuring tool we can see it getting 2.98 mm nearly 3mm .it varing the location to location.

Applying the 5mm mesh to geomentry.

getting the aprox 5mm mesh on entire geomentry.

Applying the 1mm, 3mm,5mm  mesh for model.

Before appling the different lenght for mesh for different PIDs.

1mm  mesh for the value head.

5mm mesh for body ,outlet,inlet PIDS.

3mm mesh for column.

conclusion:

• Topo cleanup for geometry ,generating the mesh for different elements size,measuring the elements .
• As the size of element is decreases, the mesh becomes more finer and matches the real shape of the geometry.
• The 1mm mesh give the better result compare to the 3mm,5mm.smaller the mesh it give accurate the results,but finer mesh expensive and complex .
• we need give finer mesh at most focus area only.