Lagrangian schemes and mesh generation methods in total energy

The equations of compressible hydrodynamics flow with shocks are used to simulate most fluid flows. Numerical Lagrangian methods have been developed and applied to 3-dimensional calculations of fusion plasmas. The main feature of these methods is that the meshing is moving and follows the fluid flow. An example of the simulation of a flow with vorticity shows that these methods are well adaptable for multi-processors computations. (A.C.)