Learning Forum

[Aras karimi]

Oh Rob, I’m disappointed. I present the problem in full here. I hope you pay attention to it. I hope that a way will be found after 2 months, which took me a lot of time.

I am optimizing the 3D shape of a wing using Fluent’s adjoint solver. My mesh is a structure type with hexahedral elements that I produced with ICEM. During the optimization, the mesh elements lose their quality and are stretched in some areas, which causes errors in the solution. Now, in order to ensure the result obtained by the optimizer, it is necessary to remesh the geometry.

It was mentioned in the adjoint solver user guide ( Remeshing is required during optimization to achieve a reliable optimized geometry ).
The adjoint solver automatically performs the remeshing process in 3D cases only on tetrahedral elements without a boundary layer, and unfortunately, it is not able to remesh on hexahedral elements, which is disappointing. Due to the lack of automatic remeshing of the adjoint solver for hexahedral elements, the deformed geometry must be manually meshed.

(Meaning of Re-meshing: geometry meshing is deformed)

Summary
On the initial geometry, a structure mesh with hexahedral elements was created by ICEM. After the optimization process by the adjoint solver, STL files, .cas and .dat of the deformed geometry are available. We have three files that we can use for meshing the deformed geometry.

According to the reviews, the software is not able to create a structured mesh on the STL file. But the ICEM software reads the STL files, but I could not convert it into a meshable geometry.

I hope you will raise this issue in the Ansys group, what is the solution for remeshing the deformed geometry whose mesh is of the structured type with hexahedral elements. It is hoped that this challenge of many engineers in this field can be solved.

Regards.