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The deflecting oscillation of planar opposed jets is experimentally studied and numerically simulated by large-eddy simulation (LES) at 25 ≤ Re ≤ 10000 (Re= U0hρ/μ, where U0 is the bulk velocity of the jet at the nozzle exit, h is the height of the slit of the planar nozzle, and ρ and μ are the density and dynamic viscosity of fluid, respectively) and 4h≤ L ≤ 40h, where L is the nozzle separation. The numerical results are validated by comparing with the experimental results of planar opposed jets. Maps of parameter space describing the deflecting oscillation of planar opposed jets at various nozzle separations and exit Reynolds numbers are presented. And the variation features of deflecting oscillation periods and velocity-pressure of turbulent planar opposed jets are primarily investigated. The results of the study show that the LES can effectively predict the deflecting oscillation of planar opposed jets. The velocity and pressure at specific points vary periodically while the deflecting oscillation of planar opposed jets happens. Furthermore, the variation periods of velocity and pressure are in accordance with the periods of the deflecting oscillation. In essence, the deflecting oscillation of planar opposed jets is caused by periodical variation and transformation of the velocity and pressure.
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Keywords:
- planar opposed jets /
- deflecting oscillation /
- large-eddy simulation
[1] Elperin I T 1961 J. Eng. Phys. 6 62
[2] Goldschmidt V W, Bradshaw P 1973 Phys. Fluids 16 354
[3] Gutmark E, Wygnanski I 1976 J. Fluid Mech. 73 465
[4] Mi J, Nathan G J 2001 14th Australasian Fluid Mechanics Conference Adelaide, Australia, December 10-14, 2001 p817
[5] Fiedler H E, Hibino K, Mensing P 1985 J. Fluid Mech. 150 281
[6] Riese M 2008 Ph. D. Dissertation (Adelaide, Australia:Adelaide University)
[7] Mi J C, Feng B P, Deo R C, Nathan G J 2009 Acta Phys. Sin. 58 7756 (in Chinese) [米建春, 冯宝平, Deo R C, Nathan G J 2009 58 7756]
[8] Mi J C, Feng B P 2010 Acta Phys. Sin. 59 4748 (in Chinese) [米建春, 冯宝平 2010 59 4748]
[9] Mi J C, Feng B P 2011 Chin. Phys. B 20 074701
[10] Liu Y H, Gan F J, Zhang K 2010 Acta Phys. Sin. 59 4084 (in Chinese) [刘演华, 干富军, 张凯 2010 59 4084]
[11] Lu H B, Liu W Q 2012 Chin. Phys. B 21 084401
[12] Besbes S, Mhiri H, Palec G L, Bournot P 2003 Heat Mass Transfer. 39 675
[13] Johansson P S, Andersson H I 2005 Phys. Fluids 17 055109
[14] Shi Y N, Qin C S 2007 Chin. Phys. Lett. 24 2281
[15] Denshchikov V A, Kondrat'ev V N, Romashov A N 1978 Fluid Dynamics 13 924
[16] Li W F, Yao T L, Liu H F, Wang F C 2011 Aiche J. 57 1413
[17] Sun Z G, Li W F, Liu H F, Yu Z H 2009 CIESC J. 60 338 (in Chinese) [孙志刚, 李伟锋, 刘海峰, 于遵宏2009 化工学报 60 338]
[18] Pawlowski R P, Salinger A G, Shadid J N, Mountziaris T J 2006 J. Fluid Mech. 551 117
[19] Li W F, Sun Z G, Liu H F, Wang F C, Yu Z H 2008 Chem. Eng. J. 138 283
[20] Li W F, Yao T L, Wang F C 2010 Aiche J. 56 2513
[21] Li W F, Sun Z G, Liu H F, Wang F C, Yu Z H 2007 CIESC J. 58 1385 (in Chinese) [李伟锋, 孙志刚, 刘海峰, 王辅臣, 于遵宏2007 化工学报 58 1385]
[22] Li W F, Sun Z G, Liu H F, Yu Z H 2008 CIESC J. 59 46 (in Chinese) [李伟锋, 孙志刚, 刘海峰, 王辅臣, 于遵宏2008 化工学报 59 46]
[23] Liu Y, Olsen M G, Fox R O 2009 Lab. Chip. 9 1110
[24] Wang G L, Lu X Y 2012 Chin. Phys. Lett. 29 064704
[25] Mathey F, Cokljat D, Bertoglio J P, Sergent E 2006 Prog. Comput. Fluid Dyn. 6 58
[26] Germano M, Piomelli U, Moin P, Cabot W H 1991 Phys. Fluids 3 1760
[27] Lilly D K 1992 Phys. Fluids 4 633
[28] Dai G C, Chen M H 2005 Fluid Mechanics in Chemical Engineering (2nd Ed.) (Beijing:Chemical Industry Press) p161 (in Chinese) [戴干策, 陈敏恒2005化工流体力学 (第二版) (北京:化学工业出版社) 第161页]
[29] Denshchikov V A, Kondrat'ev V N, Romashov A N, Chubarov V M 1983 Fluid Dynamics 18 460
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[1] Elperin I T 1961 J. Eng. Phys. 6 62
[2] Goldschmidt V W, Bradshaw P 1973 Phys. Fluids 16 354
[3] Gutmark E, Wygnanski I 1976 J. Fluid Mech. 73 465
[4] Mi J, Nathan G J 2001 14th Australasian Fluid Mechanics Conference Adelaide, Australia, December 10-14, 2001 p817
[5] Fiedler H E, Hibino K, Mensing P 1985 J. Fluid Mech. 150 281
[6] Riese M 2008 Ph. D. Dissertation (Adelaide, Australia:Adelaide University)
[7] Mi J C, Feng B P, Deo R C, Nathan G J 2009 Acta Phys. Sin. 58 7756 (in Chinese) [米建春, 冯宝平, Deo R C, Nathan G J 2009 58 7756]
[8] Mi J C, Feng B P 2010 Acta Phys. Sin. 59 4748 (in Chinese) [米建春, 冯宝平 2010 59 4748]
[9] Mi J C, Feng B P 2011 Chin. Phys. B 20 074701
[10] Liu Y H, Gan F J, Zhang K 2010 Acta Phys. Sin. 59 4084 (in Chinese) [刘演华, 干富军, 张凯 2010 59 4084]
[11] Lu H B, Liu W Q 2012 Chin. Phys. B 21 084401
[12] Besbes S, Mhiri H, Palec G L, Bournot P 2003 Heat Mass Transfer. 39 675
[13] Johansson P S, Andersson H I 2005 Phys. Fluids 17 055109
[14] Shi Y N, Qin C S 2007 Chin. Phys. Lett. 24 2281
[15] Denshchikov V A, Kondrat'ev V N, Romashov A N 1978 Fluid Dynamics 13 924
[16] Li W F, Yao T L, Liu H F, Wang F C 2011 Aiche J. 57 1413
[17] Sun Z G, Li W F, Liu H F, Yu Z H 2009 CIESC J. 60 338 (in Chinese) [孙志刚, 李伟锋, 刘海峰, 于遵宏2009 化工学报 60 338]
[18] Pawlowski R P, Salinger A G, Shadid J N, Mountziaris T J 2006 J. Fluid Mech. 551 117
[19] Li W F, Sun Z G, Liu H F, Wang F C, Yu Z H 2008 Chem. Eng. J. 138 283
[20] Li W F, Yao T L, Wang F C 2010 Aiche J. 56 2513
[21] Li W F, Sun Z G, Liu H F, Wang F C, Yu Z H 2007 CIESC J. 58 1385 (in Chinese) [李伟锋, 孙志刚, 刘海峰, 王辅臣, 于遵宏2007 化工学报 58 1385]
[22] Li W F, Sun Z G, Liu H F, Yu Z H 2008 CIESC J. 59 46 (in Chinese) [李伟锋, 孙志刚, 刘海峰, 王辅臣, 于遵宏2008 化工学报 59 46]
[23] Liu Y, Olsen M G, Fox R O 2009 Lab. Chip. 9 1110
[24] Wang G L, Lu X Y 2012 Chin. Phys. Lett. 29 064704
[25] Mathey F, Cokljat D, Bertoglio J P, Sergent E 2006 Prog. Comput. Fluid Dyn. 6 58
[26] Germano M, Piomelli U, Moin P, Cabot W H 1991 Phys. Fluids 3 1760
[27] Lilly D K 1992 Phys. Fluids 4 633
[28] Dai G C, Chen M H 2005 Fluid Mechanics in Chemical Engineering (2nd Ed.) (Beijing:Chemical Industry Press) p161 (in Chinese) [戴干策, 陈敏恒2005化工流体力学 (第二版) (北京:化学工业出版社) 第161页]
[29] Denshchikov V A, Kondrat'ev V N, Romashov A N, Chubarov V M 1983 Fluid Dynamics 18 460
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