Solution of complex phenomena by particle and continuum model

At first, transition process from thermal conductivity state to convection in two dimensional system was simulated by DSMC method. Amounts of change of heat and current were the largest at the transition process. The characteristic distance showed to become large only at the transition process. The relation between motion of atom and molecule constructing the stream field and the stream field as systematic motion of atom and molecule was simulated. The results showed that atoms in the system moved in disorder in th thermal conductivity state but they moved along the convection vortex in the convective state. For simulation of continuous system, the basic structure of energy cascade process in turbulent flow was analyzed by direct numerical simulation of stationary uniform isotropic turbulent flow. In the transient field of forced turbulent, worm coexisted with equivalent vortex face as sheet structure. Real time monitor system for super computer and work station used as calculation servo was developed. (S.Y.)