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Titolo:
A numerical study of fluid flow and heat/mass transfer over a stack of planks
Autore:
Esfahanian, AH; Dost, S; Tabarrok, B;
Indirizzi:
Univ Victoria, Dept Mech Engn, Victoria, BC V8W 2Y2, Canada Univ VictoriaVictoria BC Canada V8W 2Y2 gn, Victoria, BC V8W 2Y2, Canada
Titolo Testata:
DRYING TECHNOLOGY
fascicolo: 7-8, volume: 17, anno: 1999,
pagine: 1495 - 1510
SICI:
0737-3937(1999)17:7-8<1495:ANSOFF>2.0.ZU;2-1
Fonte:
ISI
Lingua:
ENG
Keywords:
western hemlock; wood drying; convection in kilns;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Engineering, Computing & Technology
Citazioni:
4
Recensione:
Indirizzi per estratti:
Indirizzo: Esfahanian, AH Univ Victoria, Dept Mech Engn, Victoria, BC V8W 2Y2, CanadaUniv Victoria Victoria BC Canada V8W 2Y2 C V8W 2Y2, Canada
Citazione:
A.H. Esfahanian et al., "A numerical study of fluid flow and heat/mass transfer over a stack of planks", DRY TECHNOL, 17(7-8), 1999, pp. 1495-1510

Abstract

Heat/mass transfer by air flow over a sample stack of planks ic; studied numerically. For the simulations, the low Re k-epsilon turbulence model and bounded QUICK scheme are used. The calculated Nusselt numbers are in good agreement with the experimental data. The results of our study show that the low Re turbulence models have advantages over the conventional high Re models for this type of industrial application. This is mainly due to the small height of separation bubbles resulting from the selected large blockage ratios (more than 50 percent) occurring in such flows. Numerical simulations were carried out to study the effect of the verticalair gap due to shrinkage and non uniform sawing as well as the non uniformity in the height of boards on the flow field and heat/mass transfer characteristics. The results show that the selected gap size significantly affects the local and average Nu numbers across the stack. We have suggested optimum gap sizes for maximum heat/mass for different flow velocities (Re numbers).

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 04/07/20 alle ore 14:09:06