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Analysis of low Reynolds number flow around a heated circular cylinder
Authors:László Baranyi  Szilárd Szabó  Betti Bolló  Róbert Bordás
Affiliation:(1) Department of Fluid and Heat Engineering, University of Miskolc, Miskolc, Hungary;(2) Laboratory of Fluid Dynamics and Technical Flows, University of Magdeburg, Magdeburg, Germany
Abstract:The objective of this study is to investigate the forced convection from and the flow around a heated cylinder. Experimental and computational results are presented for laminar flow around a heated circular cylinder with a diameter of 10 mm. The experiments were carried out using Particle Image Velocimetry (PIV) in a wind tunnel, and numerical simulations using an in-house code and a commercial software package, FLUENT. This paper presents comparisons for vorticity and temperature contours in the wake of the cylinder. Experimental and computational results are compared with those available in the literature for heated and unheated cylinders. An equation is suggested for a temperature-dependent coefficient defining a reference temperature to be used in place of the constant used in other studies. An attempt is also made to correct differences between average cylinder surface temperature and measured interior temperature of the cylinder. This paper was presented at the 7th JSME-KSME Thermal and Fluids Engineering Conference, Sapporo, Japan, October 2008. László Baranyi received his MEng degree from the Technical University for Heavy Industry, Hungary, in 1975 and his PhD in 1990. He worked as an associate professor at Nagaoka University of Technology, Japan, from 1995 to 1997. Dr. Baranyi is currently an associate professor at the University of Miskolc, Hungary. He serves as an editor of the Journal of Computational and Applied Mechanics. His research interests include bluff body aerodynamics and fluid-structure interaction. Szilárd Szabó, PhD (1995, University of Miskolc), professor, head of Department of Fluid and Heat Engineering University of Miskolc, Hungary. He earned his MSc degree in mechanical engineering in 1975 from the Technical University for Heavy Industry. He serves as an editor of the Journal of Computational and Applied Mechanics and a deputy editor-in-chief of the Hungarian journal GéP. Dr. Szabó’s research fields are supersonic gas ejectors, turbomachines, CFD, power engineering. Betti Bolló, assistant at the Department of Fluid and Heat Engineering, University of Miskolc, Hungary. She received her MSc degree from the University of Miskolc in Information Engineering (Systems of Power Engineering) in 2003. Ms Bolló’s research interests include CFD and internal combustion engines. Róbert Bordás, PhD student at the Laboratory of Fluid Dynamics and Technical Flows, University of Magdeburg “Ottovon-Guericke” in Germany. He received his MSc degree from the Budapest University of Tech-nology in Integrated Engineering (Faculty of Mechanical Engineering) in 2005. His research interests include optical measurements in engineering flows.
Keywords:CFD  Circular cylinder  Heated cylinder  Nusselt number  PIV  Reynolds number
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