Pressure balance with different mesh types

[Anonymous]

Colleagues,
The gate balancing was done based on the pressure and fill considering DD mesh. But when I converted the same model to 3D and ran the analysis, I observed an imbalance in the pressure(which infers the "gate must be further optimized").
Ideally the gate location must be the same irrespective of the mesh types right?
Could you please share your experience/knowledge, if you had come across the same issue? 

Thanks in advance_/\_

Ananda thirtha.

[mahesh_a_patil · Accepted solution]

Hi Ananda,

I hope you are doing well!!

As per my experience, each mesh uses different equations for a solution. Midplane and dual-domain use Hele-Shaw to solve the flow equation whereas 3D uses Navier Stokes. Midplane/DD model and 3D have different assumptions. So you will get a flow imbalance between both meshes every time.

I would suggest you to create 4 Layer 3D mesh and do part balance. It takes lesser computation time to compare to DD mesh.

I hope this will be helpful to you.

[Anonymous]

Hi Mahesh,

Thanks for your valuable feedback.
So eventually we need to optimize the gate locations after converting the mesh type from DD to 3D, right?

In short, gate locations in DD and 3D will not be the same right?

[mahesh_a_patil · Accepted solution]

Yes, Ananda,

Most of the time, I have seen variation in the part balance with respect to Mesh.

I am following 4 layers 3D mesh technique and it works fine for me. 

you can try on 2-3 parts to get an idea.

Thanks,

Mahesh Patil