Numerical simulation of thermofluid flow and mass transport for microscopic and macroscopic phenomena

Thermal engineering problems in nuclear fusion reactor and high temperature gas cooled reactor include very wide time- and spatial-scales and their broad energy levels. In this presentation, we will show some examples of the scientific visualization results applied to the numerical simulation of thermofluid flow and mass transport for microscopic and macroscopic phenomena as follows: (1) as for microscopic thermal engineering problem, numerical simulation of melting and evaporation behavior of molybdenum layer irradiated with a laser beam (Hybrid method; Monte Carlo method + molecular dynamics), (2) as for micro/macro combined problem, effects of runaway electrons on the plasma-facing components by using EGS4 under the strong magnetic fields (Monte Carlo method), (3) as for macroscopic problem, computational secondary flow behavior in a curved circular tube will be compared with the experimental result, a new type of reversal flow in an isothermal horizontal square channel was found by means of numerical simulation (control-volume finite difference method). (author)