Mesh regularization of ablating hypersonic vehicles

Claire Roche (1) , Jerome Breil (1) , Marina Olazabal (1)

1 CESTA - Centre d'études scientifiques et techniques d'Aquitaine

The ablation of a vehicle during atmospheric reentry leads to a degradation of its surface state. Ablated wall interacts with the boundary layer that develops around the object. The deformation can be seen as a ripple or a roughness pattern with different characteristic amplitudes and wavelengths. The effect on the flow is taken into account either by means of modelizations or by direct simulation by applying the deformation to the mesh. Mesh regularization techniques can be used in order to take into account wall deformations during a simulation. In this work we apply our regularization directly to a mesh which has been already deformed. The meshes will be adapted for use in a parallel CFD Navier-Stokes code. A refinement of the mesh close to the wall is required to correctly capture the boundary layer, but also to accuratly represent the geometry of the wall deformation. For the numerical methods used, a constraint of orthogonality is added to the mesh impining on the wall.

Keywords: Mesh regularization; Mesh refinement; Mesh movement; Hypersonic

Domains: Computer Science [cs]; Computational Geometry [cs.CG]; Computer Science [cs]; Data Structures and Algorithms [cs.DS]; Computer Science [cs]; Modeling and Simulation

Claire Roche, Jerome Breil, Marina Olazabal. Mesh regularization of ablating hypersonic vehicles. 8th European Congress on Computational Methods in Applied Sciences and Engineering (ECCOMAS 2022), Jun 2022, Oslo, Norway. ⟨cea-03783795⟩