{"title":"On Asymptotic Laws and Transfer Processes Enhancement in Complex Turbulent Flows","authors":"A. Gorin","volume":57,"journal":"International Journal of Mechanical and Mechatronics Engineering","pagesStart":1822,"pagesEnd":1829,"ISSN":"1307-6892","URL":"https:\/\/publications.waset.org\/pdf\/12750","abstract":"The lecture represents significant advances in\r\nunderstanding of the transfer processes mechanism in turbulent\r\nseparated flows. Based upon experimental data suggesting the\r\ngoverning role of generated local pressure gradient that takes place in\r\nthe immediate vicinity of the wall in separated flow as a result of\r\nintense instantaneous accelerations induced by large-scale vortex\r\nflow structures similarity laws for mean velocity and temperature and\r\nspectral characteristics and heat and mass transfer law for turbulent\r\nseparated flows have been developed. These laws are confirmed by\r\navailable experimental data. The results obtained were employed for\r\nanalysis of heat and mass transfer in some very complex processes\r\noccurring in technological applications such as impinging jets, heat\r\ntransfer of cylinders in cross flow and in tube banks, packed beds\r\nwhere processes manifest distinct properties which allow them to be\r\nclassified under turbulent separated flows. Many facts have got an\r\nexplanation for the first time.","references":"[1] P. Chang, Separation of Flow, Pergamon Press, Oxford, 1970\r\n[2] J.K. Eaton, J.P. Johnston, A review of research on subsonic turbulent\r\nflow reattachment. AIAA Jl, Vol. 19, pp. 1093-1100, 1981.\r\n[3] Simpson SL: Turbulent boundary layer separation. Annual Review of\r\nFluid Mechanics, vol. 2, pp. 205-234, 1989.\r\n[4] B.E. Launder, On the computation of convective heat transfer in\r\ncomplex turbulent flows, J. Heat Transfer, Vol. 110, pp. 1112-1128,\r\n1988.\r\n[5] S. Churchill, Progress in the thermal sciences: AIChE Institute Lecture.\r\nAIChE J., Vol. 46(9), pp. 1704-1722, 2000.\r\n[6] K. Hanjalic, A perspective on combining rans and les for computing\r\ncomplex flows and heat transfer, Proc. Int. Conf. Jets, Wakes and\r\nSeparated Flows, JSME, No.05-201, Toba-shi, Mie, Japan, 2005, pp.\r\n25-34.\r\n[7] A.V. Gorin, D.Ph. Sikovsky, Similarity laws of transfer processes in the\r\nturbulent separated flows, Russ. J. Eng. Thermophysics, Vol. 5, pp. 145-\r\n164, 1995\r\n[8] R.L. Simpson, Y.T. Chew, and B.G. Shivaprasad, Structure of a\r\nseparated turbulent boundary layer, J. Fluid Mech., Vol. 113, Pt 1 & 2,\r\npp. 23-73, 1981.\r\n[9] A.V. Gorin, D.F. Sikovski, Turbulent heat-and-mass-transfer model in a\r\nnear-wall zone of separated flows, J. Appl. Mech. Tech. Physics, Vol. 37,\r\npp. 370-380, 1996.\r\n[10] T. Igarashi, correlation between heat transfer and fluctuating pressure in\r\nseparating region of a circular cylinder, Int. J. Heat Mass Transfer, Vol.\r\n27, pp. 927-937, 1984.\r\n[11] T. Ota, and N. Kon, Heat transfer in a separated and reattached flow on a\r\nblunt flat plate. J. Heat Transfer, Vol. 94, pp. 29-32, 1974.\r\n[12] Gorin, A.V., and Sikovsky, D.Ph., Fundamental laws of heat and mass\r\ntransfer in turbulent flows with separated zones. Industrial\r\nThermotechnics, Vol. 21(1), pp.10-17, 2000.\r\n[13] A.V. Gorin, Heat transfer in turbulent separated flows, Proc. Int.\r\nConference on Jets, Wakes and Separated Flows, JSME, No.05-201,\r\nToba-shi, Mie, Japan, pp. 445-450, 2005.\r\n[14] N. Didden, C-M. Ho, Unsteady separation in a boundary layer produced\r\nby an impinging jet. J. Fluid Mech, Vol. 160, pp. 235-256, 1985.\r\n[15] M. Angioletti, R.M. Di Tomasso, E. Nino, and G. Ruocco, Simultaneous\r\nvisualization of flow field and evaluation of local heat transfer by\r\ntransitional impinging jets, Int. J. Heat Mass Transfer, Vol. 46, pp.1703-\r\n1713, 2003.\r\n[16] D.R.S. Guerra, J. Su, and A.P.S. Fereire, The near wall behavior of an\r\nimpingingjet, Int. J. Heat Mass Transfer, Vol. 48, pp. 2829-2840, 2005.\r\n[17] H. Martin, Heat and mass transfer between impinging gas jets and solid\r\nsurfaces, Advances in Heat Transfer, Vol. 13, pp. 1- 60, 1977.\r\n[18] C.O. Popiel, O. Trass, Visualization of a free and impinging round jet,\r\nExp. Thermal and Fluid Sci., Vol. 4, pp. 253-264, 1991.\r\n[19] A.M.A. Mohamed, Experimental investigation of heat transfer\r\ncharacteristics from arrays of free impinging circular jets and hole\r\nchannels, PhD Thesis, Otto-von-Guericke-Universit\u251c\u00f1t, Magdeburg.\r\n2005.\r\n[20] Z.G. Kostic, S. Oka, Fluid flow and heat transfer with two cylinders in\r\ncross flow, Int. J. Heat Mass Transfer, Vol. 15, pp. 279 - 299, 1972.\r\n[21] H. Nakamura, T. Igarashi, Variation of nusselt number with flow\r\nregimes brhind a circular cylinder for reynolds numbers from 70 to\r\n30,000, Int. J. Heat Mass Transfer, Vol.47, pp. 5169 - 5173, 2004.\r\n[22] A. Zukauskas, V. Makaryavicius, and A. Slanciauskas, Heat\r\nTransfer in Banks of Tubes in Crossflow, Mintis, Vilnus, 1968.\r\n[23] T.N. Wegner, A.J. Karabelas, and T.J. Hanratty, Visual studies of flow\r\nin a regular array of spheres, Chem. Eng. Sci., Vol. 26, pp. 59-63, 1971.\r\n[24] Kirillov, V.A., Matros, Yu.Sh., Sorokin, V.N., Kasamyan, M.A., and\r\nSlin-ko, M.E., 1972, Hydrodynamics in void space of the layer of\r\ncatalysts, Doklady of the Soviet Academy of Sciences, Vol. 206(6), 1409-\r\n1411.\r\n[25] A.R. Yevseev, V.E. Nakoryakov, and N.N. Romanov, Experimental\r\ninvestigation of a turbulent filtration flow, Int. J. Multiphase Flow, Vol.\r\n17, pp.103-118, 1991.\r\n[26] N.N. Romanov, Turbulent flow characteristics in regular sphere\r\npackings, PhD Thesis, Institute of Thermophysics SB AS USSR,\r\nNovosibirsk, 1988.\r\n[27] B.V. Perepelitza, Investigation of temperature field in the flow of a fluid\r\nthrough a stationary granular bed, Russ. J. Thermophysics, Vol. 7(1-2),\r\npp. 99-106, 1997.\r\n[28] A.V. Gorin, R.A. Dekhtyar-, V.A. Mukhin, and E.N. Salomatin, Heat\r\ntransfer between a filtrating fluid and channel walls in packed beds,\r\nThermophysics and Aeromechanics, Vol. 3(2), pp. 165-172, 1996.\r\n[29] A.V. Gorin, R.A. Dekhtyar-, and V.A. Mukhin, Heat transfer upon fluid\r\nfiltration in annular packed beds, Thermophysics and Aeromechanics,\r\nVol. 4, pp. 415-419, 1997.\r\n[30] R.A. Dekhtyar-, D.Ph. Sikovsky, A.V. Gorin, and V.A. Mukhin, Heat\r\ntransfer in packed bed at moderate reynolds number, High Temperature,\r\nVol. 40, pp. 693-700, 2003.\r\n[31] A.F. Savostin, A.M. Tikhonov, Investigation of plate-type heating\r\nsurfaces characteristics, Teploenergetika, Vol. 17, pp. 75-78, 1970.\r\n[32] J. Stasiek, M.W. Collins, M. Ciofalo, and P.E. Chew, Investigation of\r\nflow and heat transfer in corrugated passages -I. Experimental results,\r\nInt. J. Heat Mass Transfer, Vol.39, pp. 149-164, 1996.","publisher":"World Academy of Science, Engineering and Technology","index":"Open Science Index 57, 2011"}