Application of CFD tools in space projects

In recent years the design of spacecrafts became more and more complex. So called two phase loops, are used for thermal control where high heat rates have to be transferred. Many material experiments with fluids forming homogeneous crystals were performed or planned. At least the ventilation of manned spacecrafts as well as the detection of undesirable conditions are essential problems of todays space flight programs. To understand the physical context, to design spacecraft components or experiments and to adapt them to the special microgravity environment, it is inevitable to perform fluid dynamic analyses. Selected Computation Fluid Dynamics (CFD) applications performed on various projects are presented.