Transient and steady-state analysis of heat, mass, and momentum transfer in developing and fully-developed regions of homogeneous tubular reactors with non-Newtonian fluid flow

Molaei, E. Abbaszadeh; Amrei, S. M. H. Hashemi; Dehkordi, Asghar Molaei; Haghi, Majid

doi:10.1016/j.enconman.2012.07.026

Cited by 6 publications

(1 citation statement)

References 14 publications

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“…In addition, to solve the momentum equations of the liquid phase, the formulation of vorticity‐stream function was applied using regular grid discretization. Applying the formulation of vorticity‐stream function to solve the hydrodynamics of power‐law liquids was studied in recently published article by Abbaszadeh Molaei et al Besides, about the mass and heat transfers, due to reactive nature of the liquid phase, we had to use fine mesh size in the liquid phase to predict the concentration and temperature gradients in this region well. Grid size analysis of the numerical solution for the governing equations of liquid phase (i.e., heat and mass transfer) shows that the grid size sensitivity is so significant and we have to use significantly large mesh number in this region.…”

Section: Numerical Solutionmentioning

confidence: 99%

Comprehensive dynamic modelling and CFD simulation of heat and mass transfer in wetted wall absorption reactors

et al. 2014

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A comprehensive mathematical model has been developed to analyze transport phenomena in wetted wall absorption reactors. In this regard, a wetted wall reactor was modelled considering the entrance regions of momentum, heat and mass transfer, compressibility of the gas phase as a function of gas temperature, pressure, and composition, and also non‐Newtonian behaviour of the liquid phase. In the developed model, a gas mixture of two components, A and B, was considered as the gas phase (A as the diffusing component), while a binary liquid mixture of components C and D was taken as the liquid phase (C as the reactant component). CFD methods were applied to solve nonlinear governing equations simultaneously and the simulation results were validated against experimental data reported in the literature and excellent agreement was found. Moreover, distributions of velocity, temperature, and species concentrations of both phases were obtained and the effects of various operating conditions and physicochemical properties on these distributions were carefully studied. Furthermore, the open‐loop response of the reactor to some typical step and pulse inputs was examined. Moreover, the closed‐loop response of the reactor was also examined; in this regard, a PI controller was designed to control the reactor's output properly.

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Section: Numerical Solutionmentioning

confidence: 99%