Laminar natural convection in a pitched roof of triangular cross-section: summer day boundary conditions

作者: H Asan , L Namli

DOI: 10.1016/S0378-7788(00)00066-9

关键词:

摘要: A numerical study has been carried out for the two-dimensional laminar natural convection in a pitched roof of triangular cross-section under summer day boundary conditions. Stream function-vorticity formulation was applied and control volume integration solution technique is adopted this study. Solutions are obtained up to Rayleigh number 106. Steady-state solutions have height–base ratios 0.125≤L∗≤1. The effects ratio on flow structure heat transfer investigated. It found that considerable proportion across base wall region takes place near intersection cold horizontal hot inclined wall. relationship between mean Nusselt number, Nub, Ra, ratio, L∗, such equivalent changes influence higher factor. Comparisons with earlier works were also made.

参考文章(12)
Sadik Kakac, Ramesh K. Shah, Win Aung, Handbook of single-phase convective heat transfer : Wiley. ,(1987)
Ejup N. Ganić, Warren M. Rohsenow, J. P. Hartnett, Handbook of Heat Transfer Fundamentals ,(1985)
David Young, Iterative methods for solving partial difference equations of elliptic type Transactions of the American Mathematical Society. ,vol. 76, pp. 92- 111 ,(1954) , 10.1090/S0002-9947-1954-0059635-7
Toru Fusegi, Jae Min Hyun, Laminar and transitional natural convection in an enclosure with complex and realistic conditions International Journal of Heat and Fluid Flow. ,vol. 15, pp. 258- 268 ,(1994) , 10.1016/0142-727X(94)90011-6
M. R. Ravi, R. A. W. M. Henkes, C. J. Hoogendoorn, On the high-Rayleigh-number structure of steady laminar natural-convection flow in a square enclosure Journal of Fluid Mechanics. ,vol. 262, pp. 325- 351 ,(1994) , 10.1017/S0022112094000522
V.A. Akinsete, T.A. Coleman, Heat transfer by steady laminar free convection in triangular enclosures International Journal of Heat and Mass Transfer. ,vol. 25, pp. 991- 998 ,(1982) , 10.1016/0017-9310(82)90074-6
H Asan, Natural convection in an annulus between two isothermal concentric square ducts International Communications in Heat and Mass Transfer. ,vol. 27, pp. 367- 376 ,(2000) , 10.1016/S0735-1933(00)00117-2
E. Evren-Selamet, V S. Arpaci, C. Borgnakke, SIMULATION OF LAMINAR BUOYANCY-DRIVEN FLOWS IN AN ENCLOSURE Numerical Heat Transfer Part A-applications. ,vol. 22, pp. 401- 420 ,(1992) , 10.1080/10407789208944775
Jae Heon Lee, Taik Sik Lee, Natural convection in the annuli between horizontal confocal elliptic cylinders International Journal of Heat and Mass Transfer. ,vol. 24, pp. 1739- 1742 ,(1981) , 10.1016/0017-9310(81)90082-X
S. M. ElSherbiny, G. D. Raithby, K. G. T. Hollands, Heat Transfer by Natural Convection Across Vertical and Inclined Air Layers Journal of Heat Transfer. ,vol. 104, pp. 96- 102 ,(1982) , 10.1115/1.3245075