Journal ArticleDOI
Measurements in Buoyancy-Assisting Separated Flow Behind a Vertical Backward-Facing Step
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In this article, the effect of buoyancy on the flow and the heat transfer characteristics was investigated experimentally and numerically, using the results of measurements of velocity and temperature distributions in buoyancy-assisting laminar mixed convection boundary layer flow over a vertical two-dimensional heated backward-facing step.Abstract:
The effect of buoyancy on the flow and the heat-transfer characteristics was investigated experimentally and numerically, using the results of measurements of velocity and temperature distributions in buoyancy-assisting laminar mixed convection boundary layer flow over a vertical two-dimensional heated backward-facing step. As a result of measurements, heat transfer (Nusselt number) and reattachment length behaviors were obtained as a function of the buoyancy level. It was found that an increase in the buoyancy force causes a decrease in the size of the recirculation region behind the step and decreases in the reattachment length. An increase of the buoyancy force also causes the local Nusselt number to increase, and the location of its maximum value to move closer to the step. The results of measurements agreed well with numerical predictions. 14 refs.read more
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A review of research on laminar mixed convection flow over backward- and forward-facing steps
TL;DR: In this paper, a comprehensive review of the flow and heat transfer results of single-phase laminar mixed convection flow over vertical, horizontal and inclined backward-and forward-facing steps is presented.
Journal ArticleDOI
Convective heat transfer and fluid flow study over a step using nanofluids: A review
TL;DR: In this paper, a review of the literature on convective heat transfer on internal separated flows has been extensively conducted in the past decades, and the influence of several parameters such as the geometrical specifications, boundary conditions, type of fluids, and inclination angle on the hydrodynamic and thermal characteristics using (BFS).
Journal ArticleDOI
Flow and heat transfer characteristics of backward-facing step laminar flow in a rectangular duct
TL;DR: In this article, a three-dimensional numerical simulation has been performed for flows over a backward-facing step at low Reynolds number in order to investigate the effects of the duct aspect ratio.
Journal ArticleDOI
Effect of a circular cylinder on separated forced convection at a backward-facing step
Ankit Kumar,Amit Dhiman +1 more
TL;DR: In this article, an adiabatic circular cylinder has been used to augment the forced convection characteristics of backward-facing step flow in a two-dimensional channel by means of introducing a circular cylinder in the domain and the effects of various cross-stream positions (i.e., yc = 0-1.5) of the circular cylinder on the flow and heat transfer characteristics of the backward facing step flow has been numerically explored for the Reynolds number range 1-200 and Prandtl number of 0.71 (air).
Journal ArticleDOI
Turbulent mixed convection flow over a forward-facing step—the effect of step heights
TL;DR: In this paper, the effect of step height on turbulent mixed convection flow along a vertical flat plate was examined for step heights of 0, 11, and 22 mm at a free stream air velocity, u ∞, of 0.55 m⋅s−1, and a temperature difference, ΔT, of 30 ǫ°C between the heated walls and the free flow air (corresponding to a local Grashof number Gr x i = 6.45 × 10 10 ).