Analysis of the effects of inlet temperature frequency in fully developed laminar duct flows

Comparison of time-resolved heat transfer characteristics between laminar and turbulent convection with unsteady flow temperatures

“…Both T g ðtÞ and T s ðtÞ were approximated by a series of step functions and used in Eqs. (5) and (6) to calculate h CÀF ðtÞ.…”

“…Sucec and Sawant [4] further applied this improved quasi-steady approach in the transient, conjugated heat transfer problem of fully developed, hydrodynamic steady flow in a parallel plate duct with a sinusoidal inlet temperature variation. Recently, Hadiouche and Mansouri [5] studied the unsteady conjugated heat transfer for a fully developed laminar steady flow with periodically varying inlet temperature. The effect of the flow temperature frequency on the Nusselt number was studied by a new analytical solution.…”

“…(5) and the measured T s ðtÞ. The absorbed heat flux Time-resolved results of heat transfer coefficient for a nearly step changing flow temperature of relatively large step-change value.…”