Results 251 to 260 of about 441,728 (305)

Micromixing effects on a parallel reaction in flow reactors

Chemical Engineering & Technology, 1993
AbstractUsing the micromixing concepts of Danckwerts and Zwietering, the Peclet number Pe has been correlated mathematically to the degree of segregation J for the axial dispersion model. The results were applied to compare the micromixing effects on a model, mixed‐order parallel reaction system in continuous flow reactors.
Muhammad Atiqullah, Mirza M. Hassan, Shafkat A. Beg   +2 more
openaire   +1 more source

Turbulence effects on chemical reactions in smog chamber flows

Atmospheric Environment (1967), 1987
Abstract Turbulent mixing effects on the reaction rate of a non-premixed flow are presented for a moderately slow second-order irreversible chemical reaction. The turbulent mixing process leads to inhomogeneities in the concentration of the reactants.
S.S. Ibrahim, R.W. Bilger, N.R. Mudford
openaire   +1 more source

Fast Reactions in Bubbly Flows: Film Model and Micromixing Effects

Industrial & Engineering Chemistry Research, 2010
In our work, we focus on the Euler-Lagrange strategy to simulate bubbly flows and fast chemical reactions. We propose a film model to account for fast, multistep chemical reactions near the gas liquid interface. A combination of such a film model with Euler-Lagrange simulations for bubbly flows has not been used before. Also, we account for micromixing
Stefan Radl, Daniele Suzzi, Johannes G. Khinast   +2 more
openaire   +1 more source

Mutual effect of vibrational relaxation and chemical reactions in viscous multitemperature flows

Physical Review E, 2016
We study coupling of vibrational relaxation and chemical reactions in nonequilibrium viscous multitemperature flows. A general theoretical model is proposed on the basis of the Chapman-Enskog method modified for strongly nonequilibrium reacting flows; the model differs from models commonly used in computational fluid dynamics since it is able to ...
E V, Kustova, G P, Oblapenko
openaire   +2 more sources

Chemical Reaction Effects in Maxwell Fluid Flow Over Permeable Surface: Dual Solutions

International Journal of Nonlinear Sciences and Numerical Simulation, 2015
AbstractThis communication addresses the chemical reaction effects in two-dimensional boundary layer flow of an upper convected Maxwell (UCM) fluid over a shrinking surface. Mathematical modeling has been performed and the adequate transformations have been utilized for the conversion of partial differential system into coupled nonlinear ordinary ...
Awais, M., Muhammad, N., Hayat, T., Alsaedi, A.   +3 more
openaire   +1 more source

Crowding, Intermolecular Interactions, and Shear Flow Effects in the Diffusion Model of Chemical Reactions

The Journal of Physical Chemistry B, 2011
In the diffusion model of chemical reactions, the encounter (reaction) rate between reactant particles is governed by the Smoluchowski equation, which is a diffusion equation in a field of forces. We consider crowded environments where the particles diffuse through a "liquid" of like particles. Assuming that the liquid-like short-range structure around
Zaccone, A., Dorsaz, N., Piazza, F., De Michele, C., Morbidelli, M., Foffi, G.   +5 more
openaire   +7 more sources

Effects of homogeneous-heterogeneous reactions in flow of Powell-Eyring fluid

Journal of Central South University, 2015
The steady two-dimensional flow of Powell-Eyring fluid is investigated. The flow is caused by a stretching surface with homogeneous-heterogeneous reactions. The governing nonlinear differential equations are reduced to the ordinary differential equations by similarity transformations.
T. Hayat, M. Imtiaz, A. Alsaedi
openaire   +1 more source

Effect of laminar chaos on reaction and dispersion in eccentric annular flow

Journal of Fluid Mechanics, 1996
Generalized Taylor dispersion theory is used to study the chaotic laminar transport of a reactive solute between eccentric rotating cylinders in the presence of an inhomogeneous chemical reaction. The circumstance considered is that of laminar axial ‘Poiseuille’ flow in the annular region between the two non-concentric cylinders, accompanied by a ...
Bryden, Michelle D., Brenner, Howard
openaire   +2 more sources

Steam flow effects on hydrolysis reaction kinetics in the Cu–Cl cycle

International Journal of Hydrogen Energy, 2012
Abstract In this paper, the effects of an inert carrier gas and steam flow on the reaction kinetics of a CuCl2 hydrolysis reactor are examined for the thermochemical copper-chlorine (Cu–Cl) cycle of hydrogen production. Experimental data from two packed bed reactors, at three separate vapour pressures of H2O in the gaseous input stream, are ...
K. Pope, G.F. Naterer, Z.L. Wang
openaire   +1 more source

The jet mixing effect on reaction flow in a bluff-body burner

International Journal of Heat and Mass Transfer, 1994
Abstract This study investigates the mixing effects of primary and secondary jets on flame stability as fuel/air is injected into a bluff-body burner. A two-dimensional spray combustion model, based upon a SIMPLER method, is used for numerical studies of combusting flow.
Ma, H.K., Harn, J.S.
openaire   +1 more source