Ammar Alsabery and Habibis Saleh and Norazam Arbin and Ishak Hashim Unsteady Natural Convection in a Square Cavity Partially Filled with Porous Media Using a Thermal NonEquilibrium Model
2 - 7
2015
9
1
International Journal of Mathematical and Computational Sciences http://waset.org/publications/10000072
http://waset.org/publications/97
World Academy of Science, Engineering and Technology
Unsteady natural convection and heat transfer in a square cavity partially filled with porous media using a thermal
nonequilibrium model is studied in this paper. The left vertical wall is
maintained at a constant hot temperature Th and the right vertical wall
is maintained at a constant cold temperature Tc, while the horizontal
walls are adiabatic. The governing equations are obtained by applying
the Darcy model and Boussinesq approximation. COMSOL’s finite
element method is used to solve the nondimensional governing
equations together with specified boundary conditions. The governing
parameters of this study are the Rayleigh number (Ra 105, and Ra 106 ), Darcy namber (Da 10−2, and Da 10−3),
the modified thermal conductivity ratio (10−1 ≤ γ ≤ 104), the interphase heat transfer coefficien (10−1 ≤ H ≤ 103) and the
time dependent (0.001 ≤ τ ≤ 0.2). The results presented for
values of the governing parameters in terms of streamlines in both
fluidporouslayer, isotherms of fluid in fluidporouslayer, isotherms
of solid in porous layer, and average Nusselt number.
International Science Index 97, 2015