抄録
A non-isothermal flow in a two-dimensional enclosed space with horizontal cold jet was analyzed by Large Eddy Simulation(LES). Results from the LES computation were stored as numerical database for the purpose of investigating turbulence structures of the non-isothermal flowfield and evaluating the validity of turbulence modeling based on Reynolds Averaged Navier-Stokes equations(RANS). The reliability of LES computation was assessed by comparison with experimental data of the authors (1997). Mean fields of velocity and temperature predicted by LES showed good agreement with the experimental data. The LES database was used to evaluate each term in the transport equations of Reynolds stresses and turbulent heat fluxes. The role of each term in their equations within a supply jet area was examined, and the detailed mechanism of turbulence structure and heat transfer was clarified.
