Computation of Turbulent Forced Convection in Heat Exchangers Equipped with the Transverse Baffles
(*) Corresponding author
DOI's assignment:
the author of the article can submit here a request for assignment of a DOI number to this resource!
Cost of the service: euros 10,00 (for a DOI)
Abstract
In this paper, structure of the turbulent flow and heat transfer in tow-dimensional horizontal channel are investigated and analyzed numerically. The air circulates inside a channel of rectangular section, containing two rectangular baffle plates. Tube with baffle inserts can serve as an effective application for augmenting forced convection heat transfer. This is an important problem in the scope of heat exchangers where the characterization of the flow, pressure distribution, as well as the existence and the extension of possible recirculation need to be identified. The turbulent governing equations that describe the flow are solved by a control volumes based on the finite Volume Method, employing the TEAM code (Turbulent Elliptic Algorithm Manchester) with the k-ε turbulence model. The velocity and pressure terms of momentum equations are solved by SIMPLE (semi-implicit Method for pressure-linked equation) method. The mean velocity profiles, the velocity and temperature fields as well as the Nusselt number distribution are presented for a typical case and for the representative value of Reynolds Number. The numerical calculations of the flow field indicate that the flow patterns and the recirculating zone changes its orientation as the blockage ratio (e/H) and the Reynolds number (Re) increase. Concerning the heat transfer effects, the results shows that the Nusselt number on the channel walls are strongly increased by increasing the baffle height and the Reynolds number. Comparisons between numerical and experimental results in literature in the velocity fields show reasonable agreement
Copyright © 2014 Praise Worthy Prize - All rights reserved.
Keywords
Full Text:
PDFReferences
Demartini, L. C., Vielmo, H. A., and Möller, Q.V, Numeric and experimental analysis of turbulent flow through a channel with baffle plates, Journal of the Brazilian Society of Mechanical Sciences and Engineering, Vol. 26, n. 2, pp. 153-159, 2004.
http://dx.doi.org/10.1590/s1678-58782004000200006
Roetzel, W., Lee, D. , Experimental investigation of leakage in shell-and-tube heat exchangers with segmental baffles, International Journal of Heat & Mass Transfer, Vol. 36, pp. 3765-3771, 1993.
http://dx.doi.org/10.1016/0017-9310(93)90057-d
Berner C, Durst F, McEligot DM., Flow around Baffles, ASME Journal of Heat Transfer, Vol. 106, pp. 743-749, 1984.
http://dx.doi.org/10.1115/1.3246747
Habib, M.A., Mobarak, A.M., Sallak, M.A., Abdel Hadi, E.A., Affify, R.I., Experimental investigation of heat transfer and flow over baffles of different heights, Trans. ASME J. Heat Transfer, Vol. 116, pp.363-368, 1994.
http://dx.doi.org/10.1115/1.2911408
Kelkar, K. M., Patankar, S. V, Numerical prediction of flow and heat transfer in parallel plate channel with staggered fins, Journal of heat transfer, Vol. 109, pp. 25-30, 1987.
http://dx.doi.org/10.1115/1.3248058
Chen, C.H., Huang, W.H, Prediction for laminar forced convection in parallel-plate channels with transverse fin arrays, International Journal of Heat & Mass Transfer, Vol. 34, n. 11, pp. 145-152, 1991.
http://dx.doi.org/10.1016/0017-9310(91)90232-4
Webb, B.W., Ramadhyani, S., Conjugate heat transfer in a channel with staggered ribs, International Journal of Heat & Mass Transfer, Vol. 28, pp. 28:1679–1687, 1985.
http://dx.doi.org/10.1016/0017-9310(85)90142-5
Launder, B.E., Spalding, D. B., The numerical computation of turbulent flow, Computer Methods in Applied Mechanics and Engineering, Vol. 3, pp. 269-289, 1974.
http://dx.doi.org/10.1016/0045-7825(74)90029-2
Versteeg, H.K., and W., Malalasekera, An introduction to Computational Fluid Dynamics. The finite volume method, (Addison Wesley Longman Limited, England, 1995).
Patankar, S. V., Numerical heat transfer and fluid flow, Series in Computational Methods in Mechanics and Thermal Sciences (Hemisphere Publ. Corp., McGraw-Hill, 1980).
Korichi, A., Oufer, L., Numerical heat transfer in a rectangular channel with mounted obstacles on upper and lower walls, International Journal of Thermal Sciences, Vol. 44, pp. 644–655, 2005.
http://dx.doi.org/10.1016/j.ijthermalsci.2004.12.003
Refbacks
- There are currently no refbacks.
Please send any question about this web site to info@praiseworthyprize.com
Copyright © 2005-2024 Praise Worthy Prize