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
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.
Arbitragem científicayes
Aparece nas coleções:IPC - Artigos em revistas científicas internacionais com arbitragem

Ficheiros deste registo:
Ficheiro Descrição TamanhoFormato 
22. Friction factors of power-law fluids in chevron-type plate heat exchangers.pdf429,9 kBAdobe PDFVer/Abrir  Solicitar cópia ao autor!

Partilhe no FacebookPartilhe no TwitterPartilhe no DeliciousPartilhe no LinkedInPartilhe no DiggAdicionar ao Google BookmarksPartilhe no MySpacePartilhe no Orkut
Exporte no formato BibTex mendeley Exporte no formato Endnote Adicione ao seu Currículo DeGóis