Commenced in January 2007
Frequency: Monthly
Edition: International
Paper Count: 30184
On Asymptotic Laws and Transfer Processes Enhancement in Complex Turbulent Flows

Authors: A. Gorin

Abstract:

The lecture represents significant advances in understanding of the transfer processes mechanism in turbulent separated flows. Based upon experimental data suggesting the governing role of generated local pressure gradient that takes place in the immediate vicinity of the wall in separated flow as a result of intense instantaneous accelerations induced by large-scale vortex flow structures similarity laws for mean velocity and temperature and spectral characteristics and heat and mass transfer law for turbulent separated flows have been developed. These laws are confirmed by available experimental data. The results obtained were employed for analysis of heat and mass transfer in some very complex processes occurring in technological applications such as impinging jets, heat transfer of cylinders in cross flow and in tube banks, packed beds where processes manifest distinct properties which allow them to be classified under turbulent separated flows. Many facts have got an explanation for the first time.

Keywords: impinging jets, packed beds, turbulent separatedflows, 'two-thirds power law'

Digital Object Identifier (DOI): doi.org/10.5281/zenodo.1079792

Procedia APA BibTeX Chicago EndNote Harvard JSON MLA RIS XML ISO 690 PDF Downloads 1465

References:


[1] P. Chang, Separation of Flow, Pergamon Press, Oxford, 1970
[2] J.K. Eaton, J.P. Johnston, A review of research on subsonic turbulent flow reattachment. AIAA Jl, Vol. 19, pp. 1093-1100, 1981.
[3] Simpson SL: Turbulent boundary layer separation. Annual Review of Fluid Mechanics, vol. 2, pp. 205-234, 1989.
[4] B.E. Launder, On the computation of convective heat transfer in complex turbulent flows, J. Heat Transfer, Vol. 110, pp. 1112-1128, 1988.
[5] S. Churchill, Progress in the thermal sciences: AIChE Institute Lecture. AIChE J., Vol. 46(9), pp. 1704-1722, 2000.
[6] K. Hanjalic, A perspective on combining rans and les for computing complex flows and heat transfer, Proc. Int. Conf. Jets, Wakes and Separated Flows, JSME, No.05-201, Toba-shi, Mie, Japan, 2005, pp. 25-34.
[7] A.V. Gorin, D.Ph. Sikovsky, Similarity laws of transfer processes in the turbulent separated flows, Russ. J. Eng. Thermophysics, Vol. 5, pp. 145- 164, 1995
[8] R.L. Simpson, Y.T. Chew, and B.G. Shivaprasad, Structure of a separated turbulent boundary layer, J. Fluid Mech., Vol. 113, Pt 1 & 2, pp. 23-73, 1981.
[9] A.V. Gorin, D.F. Sikovski, Turbulent heat-and-mass-transfer model in a near-wall zone of separated flows, J. Appl. Mech. Tech. Physics, Vol. 37, pp. 370-380, 1996.
[10] T. Igarashi, correlation between heat transfer and fluctuating pressure in separating region of a circular cylinder, Int. J. Heat Mass Transfer, Vol. 27, pp. 927-937, 1984.
[11] T. Ota, and N. Kon, Heat transfer in a separated and reattached flow on a blunt flat plate. J. Heat Transfer, Vol. 94, pp. 29-32, 1974.
[12] Gorin, A.V., and Sikovsky, D.Ph., Fundamental laws of heat and mass transfer in turbulent flows with separated zones. Industrial Thermotechnics, Vol. 21(1), pp.10-17, 2000.
[13] A.V. Gorin, Heat transfer in turbulent separated flows, Proc. Int. Conference on Jets, Wakes and Separated Flows, JSME, No.05-201, Toba-shi, Mie, Japan, pp. 445-450, 2005.
[14] N. Didden, C-M. Ho, Unsteady separation in a boundary layer produced by an impinging jet. J. Fluid Mech, Vol. 160, pp. 235-256, 1985.
[15] M. Angioletti, R.M. Di Tomasso, E. Nino, and G. Ruocco, Simultaneous visualization of flow field and evaluation of local heat transfer by transitional impinging jets, Int. J. Heat Mass Transfer, Vol. 46, pp.1703- 1713, 2003.
[16] D.R.S. Guerra, J. Su, and A.P.S. Fereire, The near wall behavior of an impingingjet, Int. J. Heat Mass Transfer, Vol. 48, pp. 2829-2840, 2005.
[17] H. Martin, Heat and mass transfer between impinging gas jets and solid surfaces, Advances in Heat Transfer, Vol. 13, pp. 1- 60, 1977.
[18] C.O. Popiel, O. Trass, Visualization of a free and impinging round jet, Exp. Thermal and Fluid Sci., Vol. 4, pp. 253-264, 1991.
[19] A.M.A. Mohamed, Experimental investigation of heat transfer characteristics from arrays of free impinging circular jets and hole channels, PhD Thesis, Otto-von-Guericke-Universität, Magdeburg. 2005.
[20] Z.G. Kostic, S. Oka, Fluid flow and heat transfer with two cylinders in cross flow, Int. J. Heat Mass Transfer, Vol. 15, pp. 279 - 299, 1972.
[21] H. Nakamura, T. Igarashi, Variation of nusselt number with flow regimes brhind a circular cylinder for reynolds numbers from 70 to 30,000, Int. J. Heat Mass Transfer, Vol.47, pp. 5169 - 5173, 2004.
[22] A. Zukauskas, V. Makaryavicius, and A. Slanciauskas, Heat Transfer in Banks of Tubes in Crossflow, Mintis, Vilnus, 1968.
[23] T.N. Wegner, A.J. Karabelas, and T.J. Hanratty, Visual studies of flow in a regular array of spheres, Chem. Eng. Sci., Vol. 26, pp. 59-63, 1971.
[24] Kirillov, V.A., Matros, Yu.Sh., Sorokin, V.N., Kasamyan, M.A., and Slin-ko, M.E., 1972, Hydrodynamics in void space of the layer of catalysts, Doklady of the Soviet Academy of Sciences, Vol. 206(6), 1409- 1411.
[25] A.R. Yevseev, V.E. Nakoryakov, and N.N. Romanov, Experimental investigation of a turbulent filtration flow, Int. J. Multiphase Flow, Vol. 17, pp.103-118, 1991.
[26] N.N. Romanov, Turbulent flow characteristics in regular sphere packings, PhD Thesis, Institute of Thermophysics SB AS USSR, Novosibirsk, 1988.
[27] B.V. Perepelitza, Investigation of temperature field in the flow of a fluid through a stationary granular bed, Russ. J. Thermophysics, Vol. 7(1-2), pp. 99-106, 1997.
[28] A.V. Gorin, R.A. Dekhtyar-, V.A. Mukhin, and E.N. Salomatin, Heat transfer between a filtrating fluid and channel walls in packed beds, Thermophysics and Aeromechanics, Vol. 3(2), pp. 165-172, 1996.
[29] A.V. Gorin, R.A. Dekhtyar-, and V.A. Mukhin, Heat transfer upon fluid filtration in annular packed beds, Thermophysics and Aeromechanics, Vol. 4, pp. 415-419, 1997.
[30] R.A. Dekhtyar-, D.Ph. Sikovsky, A.V. Gorin, and V.A. Mukhin, Heat transfer in packed bed at moderate reynolds number, High Temperature, Vol. 40, pp. 693-700, 2003.
[31] A.F. Savostin, A.M. Tikhonov, Investigation of plate-type heating surfaces characteristics, Teploenergetika, Vol. 17, pp. 75-78, 1970.
[32] J. Stasiek, M.W. Collins, M. Ciofalo, and P.E. Chew, Investigation of flow and heat transfer in corrugated passages -I. Experimental results, Int. J. Heat Mass Transfer, Vol.39, pp. 149-164, 1996.