Utilize este identificador para referenciar este registo: http://hdl.handle.net/1822/17689

TítuloFriction factors of power-law fluids in chevron-type plate heat exchangers.
Autor(es)Fernandes, C. S.
Dias, R.
Nóbrega, J. M.
Maia, J. M.
Palavras-chaveplate heat exchangers
power-law fluids
generalised Reynolds number
friction factor
tortuosity
Data2008
EditoraElsevier
RevistaJournal of Food Engineering
Resumo(s)In the present work laminar flows of Newtonian and power-law fluids through cross-corrugated chevrontype plate heat exchangers (PHEs) are numerically studied in terms of the geometry of the channels. The plates area enlargement factor was a typical one (1.17), the corrugation angle, b, varied between 30 and 60 and the flow index behaviour, n, between 0.25 and 1. Single friction curves fReg = K for both Newtonian and non-Newtonian fluids are proposed for each b by developing an adequate definition of the generalised Reynolds number, Reg. The coefficient K compares well with experimental data, for all (seven) values of b, and depends on the tortuosity coefficient, s. It was found that, for each b, s decreases with the decrease of n. Food fluids are frequently processed in PHEs and usually behave as non-Newtonian fluids. This study can be useful in engineering applications as well as in the characterization of transport phenomena in PHEs.
Tipoarticle
URIhttp://hdl.handle.net/1822/17689
DOI10.1016/j.jfoodeng.2008.05.022
ISSN0260-8774
Arbitragem científicayes
AcessorestrictedAccess
Aparece nas coleções:IPC - Artigos em revistas científicas internacionais com arbitragem

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