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Titolo:
Enhancement of heat transfer from a flat surface in a channel flow by attachment of rectangular blocks
Autore:
Sara, ON; Pekdemir, T; Yapici, S; Yilmaz, M;
Indirizzi:
Ataturk Univ, Fac Engn, TR-25240 Erzurum, Turkey Ataturk Univ Erzurum Turkey TR-25240 Fac Engn, TR-25240 Erzurum, Turkey
Titolo Testata:
INTERNATIONAL JOURNAL OF ENERGY RESEARCH
fascicolo: 7, volume: 25, anno: 2001,
pagine: 563 - 576
SICI:
0363-907X(20010610)25:7<563:EOHTFA>2.0.ZU;2-R
Fonte:
ISI
Lingua:
ENG
Soggetto:
PIN-FIN ARRAYS; FRICTION; RIBS; DUCTS; WALLS;
Keywords:
heat transfer enhancement; heat transfer augmentation; channel flow; heat transfer; rectangular blocks; forced convection; heat exchangers;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Engineering, Computing & Technology
Citazioni:
23
Recensione:
Indirizzi per estratti:
Indirizzo: Sara, ON Ataturk Univ, Fac Engn, TR-25240 Erzurum, Turkey Ataturk Univ Erzurum Turkey TR-25240 , TR-25240 Erzurum, Turkey
Citazione:
O.N. Sara et al., "Enhancement of heat transfer from a flat surface in a channel flow by attachment of rectangular blocks", INT J ENERG, 25(7), 2001, pp. 563-576

Abstract

Enhancement of the heat transfer from a flat surface in a channel flow by attachment of rectangular cross-sectional blocks has been investigated as afunction of Reynolds number (Re), arrangement of the blocks with respect to the main flow direction as well as each other, and the numbers (spacing) of the blocks. The channel had a cross-sectional area of 80 x 160 mm(2) (i.e. an aspect (width-to-height) ratio of 2). Re, based on the hydraulic diameter of the channel (D-e) and bulk mean velocity (u), changed in the range of 6670-40000. The blocks were positioned both transverse and parallel withrespect to the main flow direction. The parallel blocks were arranged in both in-line and staggered orientation with respect to each other. The effect of the blocks on the flow pressure drop was also measured. The results indicated that the heat transfer could be enhanced or reduced depending on the spacing between the blocks and their positioning and arrangement. For a given pressure drop, the best heat transfer enhancement by the blocks over that from a smooth surface (without blocks) was obtained when the blocks were positioned parallel to the flow and arranged in a staggered manner with respect to each other. Copyright (C) 2001 John Wiley & Sons, Ltd.

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Documento generato il 15/07/20 alle ore 08:50:31