Experimental and numerical studies on periodic convection flow and heat transfer in a lid-driven arc-shape cavity

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Title:	Experimental and numerical studies on periodic convection flow and heat transfer in a lid-driven arc-shape cavity
Authors:	鍾雲吉;Chen, Chin-Lung;Chung, Yun-Chi;Lee, Te-Fu
Contributors:	工學院機械工程學系
Keywords:	Arc-shape cavity;Computer simulation;Convection;Convection and heat transfer;Exact sciences and technology;Experimental validation;Fluid dynamics;Fluid flow;Fundamental areas of phenomenology (including applications);Heat transfer;Holes;Kinetic energy;Laminar flows;Laminar flows in cavities;Mathematical models;Mixed convection;Periodic flow;Physics;Smoke;Turbulent flows, convection, and heat transfer
Date:	2012-12-01
Issue Date:	2026-04-23 15:08:59 (UTC+8)
Publisher:	Elsevier Ltd.;Kidlington: Elsevier Ltd
Abstract:	摘要： This paper presents experimental and numerical studies on periodic convection flow and heat transfer in a lid-driven arc-shape cavity with temperature differential. Three cases were considered: Gr=2×105, 5×105 and 1.2×106 at Re=100 (Gr = Grashof number; Re = Reynolds number). The mathematical model was proposed in our previous study. The current study performs an experiment to validate this model, to corroborate the existence of the periodic flow, and to more deeply probe the internal flow and temperature characteristics. The experimental setup primarily comprised an arc-shape cavity, a moving lid, a thermo-system, a smoke generator and an image acquisition system. The periodic convection flow in the cavity was visualized using kerosene smoke. The numerical and experimental results consistently reveal that the periodic flow pattern was observed in the case with Gr=5×105, whereas the steady-state flow pattern took place in the other two cases (Gr=2×105 and Gr=1.2×106). The numerical simulation produced reasonable and satisfactory agreement with the experiment for the periodic flow pattern and period. The difference between the predicted and measured periods is less than 5%. The transport properties, such as average kinetic energy, overall Nusselt number, stream function, phase space trajectory, local kinetic energy, velocity history and temperature distribution, were further analyzed and discussed in this paper. The proposed numerical simulation not only confirms the experimental observation, but also enhances the understanding of periodic convection in an arc-shape cavity subjected to a moving lid and temperature differential. 出版者： Kidlington: Elsevier Ltd 出版日期： 2012-12-01 出處： International communications in heat and mass transfer, 2012-12, Vol.39 (10), p.1563-1571 資源來源： Elsevier ScienceDirect Journals 版權： 2012 Elsevier Ltd 版權： 2014 INIST-CNRS 識別號： ISSN: 0735-1933 識別號： EISSN: 1879-0178 識別號： DOI: 10.1016/j.icheatmasstransfer.2012.10.003 識別號： CODEN: IHMTDL
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