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contributor authorJ. A. Tichy
date accessioned2017-05-08T23:16:28Z
date available2017-05-08T23:16:28Z
date copyrightMay, 1983
date issued1983
identifier issn0199-6231
identifier otherJSEEDO-28157#187_1.pdf
identifier urihttp://yetl.yabesh.ir/yetl/handle/yetl/97629
description abstractA 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.
publisherThe American Society of Mechanical Engineers (ASME)
titleThe Effect of Inlet and Exit Losses on Free Convective Laminar Flow in the Trombe Wall Channel
typeJournal Paper
journal volume105
journal issue2
journal titleJournal of Solar Energy Engineering
identifier doi10.1115/1.3266364
journal fristpage187
journal lastpage193
identifier eissn1528-8986
keywordsChannels (Hydraulic engineering)
keywordsLaminar flow
keywordsFlow (Dynamics)
keywordsTemperature
keywordsHeat transfer
keywordsVents
keywordsMomentum
keywordsHeat
keywordsApproximation
keywordsEquations AND Partial differential equations
treeJournal of Solar Energy Engineering:;1983:;volume( 105 ):;issue: 002
contenttypeFulltext


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