抄録
This paper describes the heat transfer characteristics and visualization on a single cir-cular laminar impinging jet in comparatively narrow space with confined wall. Tempera-ture distribution and velocity vectors in the space were obtained numerically by solving three-dimensional governing equations for the Reynolds number Re=400-2000 and the dimensionless space H=0.25-1.0. Forced convection region, mixed convection region and natural convection region exist along the radial direction. Local heat flux was visualized by using thermosensitive liquid crystal. The position and the size of recirculation flow on the impingement surface moves to downstream and increases with increase of Re and L, respectively. Average Nusselt number Num was evaluated as functions of Re and L.
