Convective Instability in Packed Beds with Internal Heat Sources and Throughflow

Yoon DY; Kim DS; Choi CK

Korean Journal of Chemical Engineering, Vol.15, No.3, 341-344, May, 1998

This article focuses on convective instabilities of throughflow in packed beds with internal heat sources. When a packed bed is heated with internal heat sources, the effects of throughflow on the onset conditions of convection have been examined numerically under the linear stability theory. The resulting conditions show that stationary instabilities occur at higher values of Darcy-Rayleigh number than the critical values as the amount of throughflow increases. The effects of free and rigid boundaries on the onset condition are also obtained for the Brinkman porous media with throughflow.

Keywords:Convective Instabilities;Throughflow;Packed Bed;Internal Heat Source;Brinkman Porous Media

[References]

Gasser RD, Kazimi MS, ASME J. Heat Transfer., 98, 49 (1976)
Gershuni GZ, Zhukhovitskii EM, "Convective Stability of Incompressible Fluids," Keter Publishing, Jerusalem (1976)
Homsy GM, Sherwood AE, AIChE J., 22, 168 (1976)
Horton CW, Rogers FT, J. Appl. Phys., 16, 367 (1945)
Jones MC, Persichetti JM, AIChE J., 32, 1555 (1986)
Lapwood ER, Process Camb. Phil. Soc., 44, 508 (1984)
Nield DA, AIChE J., 33, 1222 (1987)
Rudraiah N, Veerappa B, Balachandra RS, Int. J. Heat Mass Transf., 25, 1147 (1982)
Wooding RA, J. Fluid Mech., 9, 183 (1960)

[Referenced By]

[1] Gasser RD, Kazimi MS, ASME J. Heat Transfer., 98, 49 (1976)

[2] Gershuni GZ, Zhukhovitskii EM, "Convective Stability of Incompressible Fluids," Keter Publishing, Jerusalem (1976)

[3] Homsy GM, Sherwood AE, AIChE J., 22, 168 (1976)

[4] Horton CW, Rogers FT, J. Appl. Phys., 16, 367 (1945)

[5] Jones MC, Persichetti JM, AIChE J., 32, 1555 (1986)

[6] Lapwood ER, Process Camb. Phil. Soc., 44, 508 (1984)

[7] Nield DA, AIChE J., 33, 1222 (1987)

[8] Rudraiah N, Veerappa B, Balachandra RS, Int. J. Heat Mass Transf., 25, 1147 (1982)

[9] Wooding RA, J. Fluid Mech., 9, 183 (1960)