Establishment of experimental database on dam-breaking problem for validating interface tracking methods

In the nuclear engineering fields, a free surface plays an important role, for example, the cover-gas entrainment phenomenon in the FBR core design. There are various numerical techniques of computational fluid dynamics for multiphase flows based on the one-field model, such as a front tracking method, an interface capturing method and so on. A dam breaking problem is often chosen to validate these numerical techniques. As for the validation test, a few experiments of the dam-breaking problem were performed. However, those experimentations were performed for the limited conditions regarding the test section size and the boundary conditions. The dam-breaking experiments in order to establish an experimental database for validating the interface tracking method have been carried out by using a high-speed video camera. Then, some numerical simulations based on the MARS (Multi-interfaces Advection and Reconstruction Solver)(Kunugi, 2001) were performed and its results were compared to this experimental database. (author)