TURBULENT TRANSIENT HEAT-TRANSFER IN CHANNEL FLOW WITH STEP CHANGE ININLET TEMPERATURE

The transient forced convection in tubulent channel flow with a step c hange in inlet temperature is solved by using a hybrid scheme, namely, by combining the generalized integral transform technique with a seco nd-order accurate finite-differences. Stability and convergence of the scheme are examined. Numerical results are presented for the fluid bu lk temperature and local Nusselt number as a function of position alon g the channel at different times, and the propagation of the thermal w ave front during temperature transients is examined.