- 作者：Cé ; cile Dobrzynski ; Pascal J. Frey ; Bijan Mohammadi and Olivier Pironneau
- 关键词：Air-cooled structures ; Navier– ; Stokes solvers
- 刊名：Computer Methods in Applied Mechanics and Engineering
- 出版年：2006
- 出版时间：15 April 2006
- 年：2006
- 卷：195
- 期：23-24
- 页码：3168-3180
- 全文大小：564 K
We report here on a Navier–Stokes solver for incompressible temperature and time dependent flows dedicated to architectural applications. The building blocks are not new: a finite element method with time implicit pressure projection steps and mesh adaptativity; but putting them together in an easy to use and efficient 3D code is the challenge which motivates this paper.
For non-engineering applications the user interface is a big problem. In an earlier attempt we designed freefem3D based on a fictitious domain discretization, thus avoiding boundary fitted mesh. However it turned out that the display of the solutions requires a boundary fitted mesh; it is possible to generate a feasible surface mesh for graphics but it is much more difficult to generate a feasible surface mesh for FEM.
In this project the user interface is taken from freefem3d; then, with a marching cube algorithm we produce a graphic only feasible mesh; finally a surface mesh, adapted to a FEM computation is constructed with an adaptation module and the result is used as input to a Delaunay volumic mesh generator. The solver is optimized and parallelized, all modules are the authors’ work.
Three applications are presented, for which the data preparation takes less than a day and results are obtained overnight on a PC cluster. One of the application is presented in details; it is an air cooling system for a canister containing radio-nucleides.