Temperature and velocity field characteristics of turbulent natural convection in a vertical parallel-plate channel with asymmetric heating |
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| Authors: | Turgut Yilmaz Alastair Gilchrist |
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| Institution: | (1) Faculty of Mechanical Engineering, Mechanical Engineering Department, Istanbul Technical University, Gümüşsuyu, 34437 Istanbul, Turkey;(2) Department of Mechanical Engineering, University of Strathclyde, 75 Montrose Street, Glasgow, G1 1XJ, UK |
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| Abstract: | Turbulent natural convection in an asymmetrically heated vertical parallel-plate channel has been studied experimentally and
numerically using LDA and CFD. Simultaneous velocity and temperature measurements across the channel at different elevations
have been carried out. Three different Ra(b/h) values of 1.91 × 107, 2.74 × 107 and 3.19 × 107 are considered with the channel aspect ratio of b/h = 1/20. Experimental and numerical data are presented in the form of
streamwise direction heated wall surface temperature, mean velocity, mean temperature, Reynolds shear stress and turbulent
kinetic energy profiles along the channel for one case. These profiles exhibit the flow field development along the channel
emphatically. The numerical technique used predicts temperature field fairly well, considerably over-estimating velocity field
in the core region. |
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