Transient conjugate natural convection heat transfer along a vertical plate fin in a high-porosity medium

Journal Article · Sun Jan 01 00:00:00 EST 1989 · Numer. Heat Transfer; (United States)

DOI:https://doi.org/10.1080/10407788908944681· OSTI ID:5996369

Huang, C I; Chen, C K; Cheng, P

The non-Darcian effects on transient conjugate natural convection-conduction heat transfer from a two-dimensional vertical plate fin embedded in a high-porosity medium are studied numerically. The coupled nonlinear partial differential equations for transient natural convection in the porous medium and transient heat conduction in the fin are solved numerically with a cubic spline collocation method. Numerical results for the heat transfer characteristics are presented for water and air at selected values of the convection-conduction parameter at different times. It is shown that the inertial effect on heat transfer characteristics is negligible at short times; its effect, however, becomes increasingly important at longer times. The time taken to reach steady state is longer for a fluid with a smaller Prandtl number and for a system with a smaller value of the convection-conduction parameter.

• Research Organization: Dept. of Mechanical Engineering, National Cheng-Kung Univ., Tainan (TW); Dept. of Mechanical Engineering, Univ. of Hawaii at Manoa, Honolulu, HI (US)
• OSTI ID: 5996369
• Journal Information: Numer. Heat Transfer; (United States), Vol. 15:1
• Country of Publication: United States
• Language: English

Related Subjects

42 ENGINEERING
POROUS MATERIALS
HEAT TRANSFER
AIR
CALCULATION METHODS
NATURAL CONVECTION
NONLINEAR PROBLEMS
NUMERICAL SOLUTION
PARTIAL DIFFERENTIAL EQUATIONS
POROSITY
PRANDTL NUMBER
TWO-DIMENSIONAL CALCULATIONS
WATER
CONVECTION
DIFFERENTIAL EQUATIONS
ENERGY TRANSFER
EQUATIONS
FLUIDS
GASES
HYDROGEN COMPOUNDS
MASS TRANSFER
MATERIALS
OXYGEN COMPOUNDS
420400* - Engineering- Heat Transfer & Fluid Flow