Week 2 Challenge : Surface meshing on a Pressure valve

Surface meshing on a Pressure valve

Aim : For the given model, check for the geometrical errors and perform Topology cleanup accordingly, and creat mesh for 3 diffrent target lenghts.

Prodecedure :Check for the geometrical errors

Topology cleanup

Set up mesh

Learning outcomes

• PID creation and PID assignment,
• Different selection techniques and visibility tools,
• Basic Topology cleanup
• Basic tools used in Surface mesh

Methodology

STEP 1: Cheak for Geometrical Errors

Cheaks manager is important to cheaks diffrent types of error present in the geometry for Meshing

for given model we we are going to cheak the geometry and intersection error,

for given model intersection error were present in coloum and spring

Image shows the Cheaks manger window and wirefreme mode of model

Step 2:Fixing the the error

In faces options Selecting the New option will gives us diffrent methods filling the wholes

In them every option wont works fitts perfectly for everything

selecting best surface left to us

fitted both alternatives do not match

Fitted alternative also not matching

ENT mode with conts works better for this

Like wise fill hole option in cones works neatly like there were no pacthes before gives no cross hatchs

Above picture shows the filled suface with fill hole option

Step 3:Cheaking for Error With cheaks manager

still the intersection error is exists

Step 4: Removeing Intersected Errors in Coloum

Assigning Pid is important Part here

Pid assigned to coloum part ,we confirm that with is bulb is glowing.

If bulb is not glowing or off then it is not assigned to any part or the Part assigned with that Pid is not Visible.

After assinging Pid to all the Parts it becomes Easy to work on required Parts

To remove intersected part we have to Select Intersect option in Faces

After that selecting parts between where intersection exists

computer shows and asks for which parts to be deleted and keep as below

Step5: Cheak for intersection error for confirmation

Meshing (without spaceing auto CFD)

Sample meshing with CFD mesh with target lenght 5mm

Explanation : without spacing with auto cfd we can see that mesh is growing from cons which is not Uniform

Unstructered mesh

Meshing (with auto CFD in spaceing)

CASE 1:5mm target lenght ,tria mesh ,CFD meshing

from this case we understand that mesh lenght is not approrpriate for the model or for the spring

where is looseing its shape it had became flat

CASE 2: 3mm target lenght ,tria mesh

CASE 3:1mm mesh length , Tria mesh

Result:

By observing the 5mm target lenght is very larger in some of corners and spring , where cuves and sharp edges deformed not fitting this so 5mm case is't good for whole parts

Coming to 3mm target lenght even though it is better than 5mm target lenght still some improvement is need

1mm target length fits better as observing it is capturing all the elements in model

Conclusion :

from the above 3 cases we can conclude that as the target lenght decreses it gets better but we have approch with suitable mesh and Target length