Numerical Simulation on Fluid Flow and Heat Transfer Characteristics of Narrow Rectangular Channel in Rolling Motion

The three dimensional unsteady physical model and mathematical model of turbulent flow and heat transfer in the narrow rectangular channel were established,and the corresponding flow field and temperature field was numerically simulated.The time-averaged Nusselt number and time-averaged friction coefficients of the channel were investigated under different Reynolds number.The computed results showed that the time-average Nusselt number and time-averaged friction coefficient is larger slightly than the one in the steady-state,and both the Nusselt number and frictional pressure drop of the channel were oscillated periodically along with rolling period and rolling amplitude.