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A mathematical model for heat transfer in a packed bed and a simplified solution thereof
Author(s) -
Kim D. S.,
Gates L. E.,
Brodkey Robert S.
Publication year - 1972
Publication title -
aiche journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.958
H-Index - 167
eISSN - 1547-5905
pISSN - 0001-1541
DOI - 10.1002/aic.690180324
Subject(s) - heat transfer , thermal conduction , thermodynamics , logarithm , packed bed , mechanics , porous medium , porosity , linearity , mixing (physics) , algebraic equation , dispersion (optics) , mass transfer , materials science , chemistry , mathematics , physics , mathematical analysis , chromatography , nonlinear system , composite material , optics , quantum mechanics
Abstract Heat transfer in packed beds can be mathematically modeled to account for the heat transfer between the particles and the gas phase, the conduction through the solid phase of particles, and the mixing or dispersion within the gas phase in the void structure of the porous media. To solve the resulting differential equations numerically is not easy. The solution for sinusoidal gas temperature input assumes linearity of the logarithm of the temperature with time. If, in addition, linearity with distance can be assumed, then the solution can be vastly simplified to finding the real root of a fourth‐order algebraic equation.