Abstract
The transient laminar forced convection of power-law fluids along a wavy surface is studied by the coordinate transformation and the cubic spline collocation method. Effects of the power-law index and the amplitude-wavelength ratio on the Nusselt number and the skin-friction coefficient are examined. The fluid with larger power-law index has larger transient local Nusselt numbers at the leading edge; as the fluid moves downstream from the leading edge, the transient local Nusselt number and the transient mean Nusselt number of dilatant fluids decrease rapidly while those of pseudoplastic fluids increase. The transient local skin-friction coefficient decreases as the power-law index is increased. Moreover, the harmonic curves for the transient local Nusselt number and the transient local skin-friction coefficient have the same wave number as that of the wavy surface.
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