Published 12 issues per year
ISSN Print: 1091-028X
ISSN Online: 1934-0508
Indexed in
Flow and Heat Transfer Within Segregated Beds of Solid Particles
ABSTRACT
A model for the transient fluid flow and heat transfer within an axially symmetrical circular cylindrical packed bed of solids containing two different layers of porous matrices is described. The system relates to a cylindrical packed bed fitted with an axial core of a porous matrix that is different from the surrounding cylindrical shell. The influence of permeability ratio (0.0625−16) and Reynolds number (1000 and 2000) on the thermal wave propagation is described. A hot stream of dry air is forced to flow axially at the inlet to the bed. The numerically predicted results are validated against experimental data obtained in a small laboratory test rig 63 mm in diameter and 120 mm in length that is packed with uniform diameter spherical glass beads (3−12 mm in diameter). An analytical model was also developed to estimate the velocity in the bed and compared with the value obtained from the numerical solution of the volume-averaged Navier-Stokes equation. The results are presented for Reynolds numbers of 1000 and 2000. It is found that for a highly fractured core, the heat diffuses radially, while for a low permeability core the heat transfer takes place by advection and diffusion. In the latter case, the Reynolds number has a significant effect on the rate of heat transfer.
-
Khadrawi A. F., Tahat M. S., Al-Nimr M. A., Validation of the Thermal Equilibrium Assumption in Periodic Natural Convection in Porous Domains, International Journal of Thermophysics, 26, 5, 2005. Crossref
-
Kumari M., Pop I., Mixed Convection Boundary Layer Flow Past a Horizontal Circular Cylinder Embedded in a Bidisperse Porous Medium, Transport in Porous Media, 77, 2, 2009. Crossref
-
Saeid N. H., Maximum density effects on natural convection in a porous cavity under thermal non-equilibrium conditions, Acta Mechanica, 188, 1-2, 2007. Crossref
-
Morosuk T.V., Entropy generation in conduits filled with porous medium totally and partially, International Journal of Heat and Mass Transfer, 48, 12, 2005. Crossref
-
Aboelsoud W., Wu W., Chow L.C., Saarloos B.A., Rini D.P., Analysis of thermal and hydraulic performance of V-shape corrugated carbon foam, International Journal of Heat and Mass Transfer, 78, 2014. Crossref
-
Goldstein R.J, Eckert E.R.G, Ibele W.E, Patankar S.V, Simon T.W, Kuehn T.H, Strykowski P.J, Tamma K.K, Heberlein J.V.R, Davidson J.H, Bischof J, Kulacki F.A, Kortshagen U, Garrick S, Heat transfer––a review of 2001 literature, International Journal of Heat and Mass Transfer, 46, 11, 2003. Crossref
-
Mohamad A.A., Heat transfer enhancements in heat exchangers fitted with porous media Part I: constant wall temperature, International Journal of Thermal Sciences, 42, 4, 2003. Crossref
-
Kamal M. M., Mohamad A. A., Combustion in Porous Media, Proceedings of the Institution of Mechanical Engineers, Part A: Journal of Power and Energy, 220, 5, 2006. Crossref
-
Nield Donald A., Bejan Adrian, External Natural Convection, in Convection in Porous Media, 2017. Crossref
-
Nield Donald A., Bejan Adrian, Forced Convection, in Convection in Porous Media, 2017. Crossref
-
Nield Donald A., Bejan Adrian, External Natural Convection, in Convection in Porous Media, 2013. Crossref
-
Maerefat Mehdi, Mahmoudi S. Yasser, Mazaheri Kiumars, Numerical Simulation of Forced Convection Enhancement in a Pipe by Porous Inserts, Heat Transfer Engineering, 32, 1, 2011. Crossref
-
Li Chuanchang, Cui Guohua, Zhai Jianguang, Chen Saixuan, Hu Zhi, Enhanced heat transfer and flow analysis in a backward-facing step using a porous baffle, Journal of Thermal Analysis and Calorimetry, 141, 5, 2020. Crossref
-
Alfellag Mohanad A., Ahmed Hamdi E., Jehad Mohammed Gh., Hameed Marwan, Assessment of heat transfer and pressure drop of metal foam-pin-fin heat sink, International Journal of Thermal Sciences, 170, 2021. Crossref