Numerical and experimental study of forced convection in graphite foams of different configurations

K. C. Leong, Hongyu Li, L. W. Jin, J. C. Chai

Research output: Contribution to journalArticle

29 Citations (Scopus)

Abstract

Forced convection heat transfer in a channel with different configurations of graphite foams is experimentally and numerically studied in this paper. The physical properties of graphite foams such as the porosity, pore diameter, density, permeability and Forchheimer coefficient are determined experimentally. The local temperatures at the surface of the heat source and the pressure drops across different configurations of graphite foams are measured. In the numerical simulations, the Navier-Stokes and Brinkman-Forchheimer equations are used to model the fluid flow in the open and porous regions, respectively. The local thermal non-equilibrium model is adopted in the energy equations to evaluate the solid and fluid temperatures. Comparisons are made between the experimental and simulation results. The results showed that the solid block foam has the best heat transfer performance at the expense of high pressure drop. However, the proposed configurations can achieve relatively good enhancement of heat transfer at moderate pressure drop.

LanguageEnglish
Pages520-532
Number of pages13
JournalApplied Thermal Engineering
Volume30
Issue number5
Early online date20 Oct 2009
DOIs
Publication statusPublished - Apr 2010
Externally publishedYes

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Forced convection
Foams
Graphite
Pressure drop
Heat transfer
Density (specific gravity)
Flow of fluids
Physical properties
Porosity
Temperature
Fluids
Computer simulation
Hot Temperature

Cite this

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abstract = "Forced convection heat transfer in a channel with different configurations of graphite foams is experimentally and numerically studied in this paper. The physical properties of graphite foams such as the porosity, pore diameter, density, permeability and Forchheimer coefficient are determined experimentally. The local temperatures at the surface of the heat source and the pressure drops across different configurations of graphite foams are measured. In the numerical simulations, the Navier-Stokes and Brinkman-Forchheimer equations are used to model the fluid flow in the open and porous regions, respectively. The local thermal non-equilibrium model is adopted in the energy equations to evaluate the solid and fluid temperatures. Comparisons are made between the experimental and simulation results. The results showed that the solid block foam has the best heat transfer performance at the expense of high pressure drop. However, the proposed configurations can achieve relatively good enhancement of heat transfer at moderate pressure drop.",
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Numerical and experimental study of forced convection in graphite foams of different configurations. / Leong, K. C.; Li, Hongyu; Jin, L. W.; Chai, J. C.

In: Applied Thermal Engineering, Vol. 30, No. 5, 04.2010, p. 520-532.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Numerical and experimental study of forced convection in graphite foams of different configurations

AU - Leong, K. C.

AU - Li, Hongyu

AU - Jin, L. W.

AU - Chai, J. C.

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AB - Forced convection heat transfer in a channel with different configurations of graphite foams is experimentally and numerically studied in this paper. The physical properties of graphite foams such as the porosity, pore diameter, density, permeability and Forchheimer coefficient are determined experimentally. The local temperatures at the surface of the heat source and the pressure drops across different configurations of graphite foams are measured. In the numerical simulations, the Navier-Stokes and Brinkman-Forchheimer equations are used to model the fluid flow in the open and porous regions, respectively. The local thermal non-equilibrium model is adopted in the energy equations to evaluate the solid and fluid temperatures. Comparisons are made between the experimental and simulation results. The results showed that the solid block foam has the best heat transfer performance at the expense of high pressure drop. However, the proposed configurations can achieve relatively good enhancement of heat transfer at moderate pressure drop.

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KW - Graphite foams

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