Journal ArticleDOI
Evaluation of steady flow profiles in rectangular and circular packed beds by a variational method
D. Vortmeyer,J. Schuster +1 more
TLDR
In this paper, the Brinkman-equation is solved by an equivalent variational problem in order to obtain steady flow profiles which satisfy the conditions w = 0 and e = 1 at the container wall of a packed bed.About:
This article is published in Chemical Engineering Science.The article was published on 1983-01-01. It has received 290 citations till now. The article focuses on the topics: Isothermal flow & Variational method.read more
Citations
More filters
Journal ArticleDOI
Thermal dispersion in a porous medium
C.T. Hsu,Ping Cheng +1 more
TL;DR: The thermal dispersion conductivity tensor for convection in a porous medium is derived based on the method of volume averaging of the velocity and temperature deviations in the pores.
Journal ArticleDOI
A critical review of dispersion in packed beds
TL;DR: In this paper, the authors summarized and reviewed a great deal of information from the literature on dispersion in packed beds, and provided empirical correlations for the prediction of the dispersion coefficients (D T and D L) over the entire range of practical values of Sc and Pem.
Journal ArticleDOI
A review of correlations to model the packing structure and effective thermal conductivity in packed beds of mono-sized spherical particles
TL;DR: In this article, a review of the literature describing the packing structure and effective thermal conductivity of randomly packed beds consisting of mono-sized particles is presented, with particular attention paid to the packing structures (porosity, coordination number, and contact angles) and heat transfer.
Journal ArticleDOI
Voidage variation in packed beds at small column to particle diameter ratio
TL;DR: In this article, a new radial bed porosity model was proposed and experimental data and a radial bed voidage model was presented, which is used to predict the radial bed's voidage and average bed's porosity.
Journal ArticleDOI
Axial and radial dispersion in fixed beds
TL;DR: In this paper, the dependence of axial and radial Peclet groups for dispersion of mass upon the Schmidt and Reynolds groups is correlated throughout the range of Reynolds number by fundamentally-based equations for beds of spherical and cylindrical particles.
References
More filters
Journal ArticleDOI
Velocity, temperature and conversion profiles in fixed bed catalytic reactors
J.J. Lerou,Gilbert F. Froment +1 more
TL;DR: In this paper, the simulation of a reactor for a strongly exothermic process based on a model accounting for radial void, velocity and temperature profiles is compared with the predictions based upon a less refined model which does not consider the effect of radial void and velocity profiles.
Journal ArticleDOI
Flow model for velocity distribution in fixed porous beds under isothermal conditions
TL;DR: Using the generalized Ergun equation a one-dimensional formulation for flow of fluids through packed beds taking into account the variation of porosity along the radial direction is presented in this article, where it is found that there is a reasonable agreement between the numerical and the experimental results.
Journal ArticleDOI
Ignition/extinction phenomena in a wall cooled fixed bed reactor
O. Kalthoff,D. Vortmeyer +1 more
TL;DR: In this paper, measured ignition/extinction temperatures and temperature profiles in a wall cooled exothermic fixed bed reactor are compared with the solutions of the two dimensional pseudohomogeneous model.