Abstract
A nonisothermal flow affected by effects of wall curvature and rotation is characteristic of a micro gas-turbine. In general, the effects of curvature and rotation are regarded as similar in nature. However, the unified parameter which represents both effects is not sufficiently clear. In this study, we performed the direct numerical simulation (DNS) of thermal turbulent flow in a rotating curved channel, and explored the fundamental characteristics of this kind of turbulent flow on the basis of the obtained statistical turbulence quantities and instantaneous velocity and thermal fields. Also, we propose a new unified parameter for curvature and rotation effects, and validate it with the results of DNS.
