Mesh generation advices Code_Saturne website

Hi,
I have found this document on Code_Saturne website [Mesh_Generation](https://www.code-saturne.org/cms/sites/default/files/file_attach/BPG/BPG-2-Mesh-Generation.pdf) and as it is not dated and referenced on Code_Saturne website, I have not found any information in the actual v7 guides, so are the information related on the mesh generation still valid ?
More precisely, is it better to use quad based/hexa meshes or triangle based/tetra meshes with Code_Saturne ? I thought that hexa were better but in the document, it is stated that :

> For RANS computations, at least, a good mesh consisting of tetrahedra (a fine mesh of equilateral tetrahedra) is a better choice than a mesh of hexahedra containing non-orthogonal cells.

Is this document up to date ? I get poor performances with tetrahedra whereas hexa meshes work nice

参照されている Mesh_Generation PDF を現在の v7 ガイドおよび Code_Saturne のウェブサイトと照合して確認してください。メッシュに関する推奨事項と引用された RANS の指針が引き続き有効かどうかを判断し、そのうえで現在の推奨事項を文書化し、四面体メッシュと六面体メッシュで性能に関して異なる観察結果が得られる理由を説明してください。

索引モデルが issue の本文から書いたものです。