Structured multi-block mesh non-smooth
 

Hello,
I am working with ICEM-CFD for structured grid generation and output to CFL3D solver format.

Shown below is the rectangular 2D domain of a no-slip viscous plate in the bottom horizontal with a wedge like shock generator (SG) in the middle of the domain.

Currently, I have split the domain into 4 blocks as shown. The issue I am facing is the grid lines originating from the sharp leading edge of the SG are splitting and diverging into a triangular non-smooth appearance. Pic attached of pre-mesh. The issue is present even at the rear of the SG with the grid lines emerging from the two points diverging non-parallel to each other.

I totally want to avoid this, and want to keep a smooth structured grid with rectangular cells to the maximum extent possible. Please help, I don't know which feature to use to obtain a proper grid. The proper grid from a similar case study is shown below.

Use the Extend Splits feature.
Blocking > Split Block > Extend Splits, use All and apply.


Since you have split only a selected block, but not all (valid practice here), some edges are created implicitly to maintain a valid grid structure. With extend splits, you can unmask those edges. This action will allow you to regain the bunching control on the far field edges.




Add.: You might need to collapse a block on the (likely) upstream side. It seems there is a triangular, degenerated block.

I think it would be just to move the vertices in both downstream and upstream should do the trick, just move it in the z direction and eye ball it to be straight as possible (not recommended but it gets the job done).

Final thing is the collapse block in the upstream I think are necessary as bluebase mentioned.

Best regards
Lucky

Structured multi-block mesh non-smooth
 

Hello,
thanks to both, bluebase and lucky. I did give it a try once, but there seems to be atleast some level of such triangular blocks, owing to the two vertices that automatically get generated because of the shock generator. I have merged the two vertices into a single point by association. I hope this was what you had meant.

https://drive.google.com/file/d/1bAD...ew?usp=sharing