摘要Heating effects of air flows past a two-dimensional circular cylinder at low Reynolds numbers and low Mach numbers are investigated by numerical simulation. The cylinder wall is heated partially rather than heated on the whole surface as with previous researches. The heating effects are completely different for various heating locations on the cylinder surface. Heating either windward or leeward side stabilizes the flow and reduces or completely suppresses vortex shedding from the cylinder at supercritical Reynolds numbers, which is consistent with previous results of heating on the whole surface of the cylinder. However, as the lateral sides of the cylinder (perpendicular to the stream-wise direction) are heated, an adverse effect is found for the first time in that the flow is destabilized and vortex shedding can be excited at subcritical Reynolds numbers. As the lateral sides of the cylinder are cooled, the flow is stabilized.
Abstract：Heating effects of air flows past a two-dimensional circular cylinder at low Reynolds numbers and low Mach numbers are investigated by numerical simulation. The cylinder wall is heated partially rather than heated on the whole surface as with previous researches. The heating effects are completely different for various heating locations on the cylinder surface. Heating either windward or leeward side stabilizes the flow and reduces or completely suppresses vortex shedding from the cylinder at supercritical Reynolds numbers, which is consistent with previous results of heating on the whole surface of the cylinder. However, as the lateral sides of the cylinder (perpendicular to the stream-wise direction) are heated, an adverse effect is found for the first time in that the flow is destabilized and vortex shedding can be excited at subcritical Reynolds numbers. As the lateral sides of the cylinder are cooled, the flow is stabilized.
XIN Xiao-Feng;CHEN Cheng;WANG Bo-Fu;MA Dong-Jun;SUN De-Jun. Local Heating Effect of Flow Past a Circular Cylinder[J]. 中国物理快报, 2010, 27(4): 44701-044701.
XIN Xiao-Feng, CHEN Cheng, WANG Bo-Fu, MA Dong-Jun, SUN De-Jun. Local Heating Effect of Flow Past a Circular Cylinder. Chin. Phys. Lett., 2010, 27(4): 44701-044701.
[1] Ma D J, Sun D J and Yin X Y 2005 Chin. Phys. Lett. 22 1964 [2] Guo X H, Lin J Z and N D M 2009 Chin. Phys. Lett. 26 084701 [3] Bearman P W 1984 Ann. Rev. Fluid Mech. 16 195 [4] Dipankar A, Senguupta T K and Talla S B 2007 J. Fluid Mech. 573 171 [5] Wang A B, Trávnívcek Z and Chia K C 2000 Phys. Fluids 12 1401 [6] Lecordier J C, Hamma L and Paranthoën P 1991 Exp. Fluids 10 224 [7] Dumouchel F, Lecordier J C and Paranthoën P 1998 Int. J. Heat Mass Transfer 41 1787 [8] Shi J M, Gerlach D, Breuer M and Biswas G 2004 Phys. Fluids 16 4331 [9] Lecordier J C, Dumouchel F and Paranthoën P 1999 Int. J. Heat Mass Transfer 42 3131 [10] Fedorchenko A I, Trávnívcek Z and Wang A B 2007 Phys. Fluids 19 051701 [11] Sabanca M and Durst F 2003 Phys. Fluids 15 1821 [12] Lange C F, Durst F and Breuer M 1998 Int. J. Heat Mass Transfer 41 3409 [13] Liu Y, Ma D J, Sun D J and Yin X Y 2009 Prog. Natural Sci. 19 1831 [14] Theofilis V 2003 Prog. Aerospace Sci. 39 249
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