Published 4 issues per year
ISSN Print: 1065-3090
ISSN Online: 1940-4336
Indexed in
FLOW VISUALIZATION AND TRANSPORT PHENOMENA OVER A SLOT-PERFORATED FLAT SURFACE BETWEEN TWO PARALLEL PLATES
ABSTRACT
A theoretical and experimental study is performed to investigate unsteady, two-dimensional, incompressible thermal-fluid flow over both sides of a slot-perforated flat surface, which is placed in a two-dimensional channel. The governing boundary-layer equations are discretized by means of a finite-difference technique to determine streamwise and transverse velocity components. The roles of both the Reynolds number and the ratio of the slot width, d, to the plate thickness, δ, on the velocity and thermal fields are disclosed. It is found from the study that: (1) at a small value of Re and/or d/δ, flow and thermal fields over the slot exhibit no timewise variation; (2) when Re and d/δ exceed certain values, an alternate crossing of flow from one side of the plate to the other occurs across the slot; (3) the alternating change in the fluid flow disturbs the thermal boundary layer formed along the plate and induces mixing of the upper and lower streams of the plate downstream from the slot, resulting in an amplification of heat transfer performance; and (4) heat transfer rate at the plate is affected by a combination of Re and d/δ. These results in the velocity field are confirmed by the flow visualization using ion-exchange resins.
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Torii Shuichi, Yang Wen-Jei, Thermal-fluid transport phenomena in an axially rotating flow passage with twin concentric orifices of different radii, International Journal of Energy Research, 30, 10, 2006. Crossref
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Torii Shuichi, Yang Wen-Jei, Thermal transport phenomena over a slot-perforated flat surface in pulsating free stream, International Journal of Thermal Sciences, 41, 3, 2002. Crossref
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Torii Shuichi, Umeda Shinzaburo, Yang Wen-jei, Ieiri Hidetoshi, Thermal-Fluid Flow Transport Phenomenon over Slot-Perforated Flat Surface in Narrow Channel, 9th AIAA/ASME Joint Thermophysics and Heat Transfer Conference, 2006. Crossref
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Torii Shuichi, Effect of a Vertical Partition Plate on the Thermal Fluid-Flow in a Rectangular Cavity with Injection and Suction Ducts, JOURNAL OF CHEMICAL ENGINEERING OF JAPAN, 40, 1, 2007. Crossref
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Torii Shuichi, Yang Wen-Jei, Iino Naoko, Thermal Fluid Flow Transport Phenomenon Over Vertical Slot-Perforated Flat Fins With Heat Sink in Natural Convection Environment, Heat Transfer, Part A, 2005. Crossref