Abstract
Horizontal rolls, generated in convective flow above a partially heated bottom in a rectangular box are studied experimentally for a wide range of the Prandtl number (7 ≤ P r ≤ 1020), the Rayleigh number (300 ≤ R a ≤ 2.8 × 107) and the aspect ratio (0.08 ≤ a ≤ 0.7). Experimental studies are supported by direct numerical simulations, which made possible the examination of the regimes inaccessible in the experiment, and also to investigate in detail the heat transfer in the convective flow. A variety of regimes with longitudinal helical rolls, with transverse rolls and with mixed structures has been observed. The structure of secondary flows is defined by the level of convective supercriticality in the boundary layer (Rayleigh number) and the intensity of the throughflow, defined by the Reynolds number, which depends itself on the heating and size, i.e. on the Rayleigh number. Most of the studied regimes were characterized by the appearance of longitudinal rolls. The transverse rolls appear in the flow only under the conditions of the large vertical drop in the temperature and weak large-scale flow (that is possible only at large values of the Prandtl number). Both longitudinal and transverse rolls lead to remarkable heat transfer enhancement. The formation and characteristics of horizontal rolls are described in details.
Similar content being viewed by others
References
J.E. Hart, J. Atmos. Sci. 29, 687 (1972)
G.Z. Gershuni, E.M. Zhukhovitskii, V.M. Myznikov, J. Appl. Mech. Tech. Phys. 15, 78 (1974)
E.M. Sparrow, R.B. Husar, J. Fluid Mech. 37, 251 (1969)
H. Shaukatullah, B. Gebhart, Int. J. Heat Mass Transfer 21, 1481 (1978)
P. Jeschke, H. Beer, J. Fluid Mech. 432, 313 (2001)
W.K.S. Chiu, C.J. Richards, Y. Jaluria, Phys. Fluids 12, 2128 (2000)
A. Benderradji, A. Haddad, R. Taher, M. Médale, C. Abid, F. Papini, Heat and Mass Transfer 44, 1465 (2008)
T.F. Lin, Int. J. Heat Fluid Flow 24, 299 (2003)
E. Schroder, K. Buhler, Int. J. Heat Mass Transfer 38, 1249 (1995)
X. Nicolas, A. Mojtabi, J.K. Platten, Phys. Fluids 9, 337 (1997)
J.M. Luijkx, J.K. Platten, J. Non-equilib. Thermodyn. 6, 141 (1981)
J.M. Luijkx, J.K. Platten, C.L. Legros, Int. J. Heat Mass Transfer 24, 1287 (1981)
J.R. Maughan, F.P. Incropera, Exp. Fluids 5, 334 (1987)
D. Etling, R.A. Brown, Boundary-Layer Meteor. 65, 215 (1993)
J. Wurman, J. Winslow, Science 280, 555 (1998)
I. Morrison, S. Businger, F. Marks, P. Dodge, J.A. Businger, J. Atmos. Sci. 62, 2662 (2005)
J.A. Zhang, K.B. Katsaros, P.G. Black, S. Lehner, J.R. French, W.M. Drennan, Boundary-Layer Meteor. 128, 173 (2008)
R.C. Foster, J. Atmos. Sci. 62, 2647 (2005)
I. Ginis, A.P. Khain, E. Morozovsky, J. Atmos. Sci. 61, 3049 (2004)
G.O. Hughes, R.W. Griffiths, Annu. Rev. Fluid Mech. 40, 185 (2008)
G.P. Bogatyrev, Sov. J. Exp. Theor. Phys. Lett. 51, 630 (1990)
V.G. Batalov, A.N. Sukhanovskii, P.G. Frik, Fluid Dyn. 42, 540 (2007)
J.C. Mullarney, R.W. Griffiths, G.O. Hughes, J. Fluid Mech. 516, 181 (2004)
G.Z. Gershuni, E.M. Zhukhovitskii, A.A. Nepomniashchii, (Moscow Izdatel Nauka, 1989)
M.C. Kim, J.S. Baik, I.G. Hwang, D.Y. Yoon, C.K. Choi, Chem. Eng. Sci. 54, 619 (1999)
Author information
Authors and Affiliations
Corresponding author
Rights and permissions
About this article
Cite this article
Sukhanovsky, A., Batalov, V., Teymurazov, A. et al. Horizontal rolls in convective flow above a partially heated surface. Eur. Phys. J. B 85, 9 (2012). https://doi.org/10.1140/epjb/e2011-20420-7
Received:
Revised:
Published:
DOI: https://doi.org/10.1140/epjb/e2011-20420-7