contributor author | J. A. Tichy | |
date accessioned | 2017-05-08T23:16:28Z | |
date available | 2017-05-08T23:16:28Z | |
date copyright | May, 1983 | |
date issued | 1983 | |
identifier issn | 0199-6231 | |
identifier other | JSEEDO-28157#187_1.pdf | |
identifier uri | http://yetl.yabesh.ir/yetl/handle/yetl/97629 | |
description abstract | A numerical solution for two-dimensional free convective laminar flow in the Trombe wall channel has recently been presented by Akbari and Borgers [1 ]. Their analysis assumed no flow losses in the channel entrance and exit, other than the exit dynamic head (loss coefficient k = 1), however the actual coefficient for combined inlet and exit losses is probably 2 < k < 5. In the present study, the convective terms of the momentum and energy equations are linearized through an Oseen-type approximation. A closed-form series solution to the resulting partial differential equations is obtained. Results are presented for dimensionless temperature and velocity field, flow rate and heat transfer; in terms of loss coefficient, surface temperature ratio, and Grashof number. As expected, vent loss reduces flow rate significantly: for loss coefficient k = 5, flow rate is reduced by ∼70 percent relative to k = 1. Surprisingly, at high Grashof number, vent loss can cause a significant (∼60 percent) increase in heat transfer. Reduction in flow rate occurs entirely due to flow velocity decrease in the region near the channel center, which contributes negligibly to the total heat delivery. | |
publisher | The American Society of Mechanical Engineers (ASME) | |
title | The Effect of Inlet and Exit Losses on Free Convective Laminar Flow in the Trombe Wall Channel | |
type | Journal Paper | |
journal volume | 105 | |
journal issue | 2 | |
journal title | Journal of Solar Energy Engineering | |
identifier doi | 10.1115/1.3266364 | |
journal fristpage | 187 | |
journal lastpage | 193 | |
identifier eissn | 1528-8986 | |
keywords | Channels (Hydraulic engineering) | |
keywords | Laminar flow | |
keywords | Flow (Dynamics) | |
keywords | Temperature | |
keywords | Heat transfer | |
keywords | Vents | |
keywords | Momentum | |
keywords | Heat | |
keywords | Approximation | |
keywords | Equations AND Partial differential equations | |
tree | Journal of Solar Energy Engineering:;1983:;volume( 105 ):;issue: 002 | |
contenttype | Fulltext | |