Ferrofluid magnetoviscous control of wall flow channeling in porous media

作     者：Faal Larachi Damien Desvigne 

作者机构：Department of Chemical Engineering Laval University Que. G1K 7P4 Canada 

出 版 物：《China Particuology》 (中国颗粒学报)

年 卷 期：2007年第5卷第1期

页      面：50-60页

核心收录：

学科分类：080801[工学-电机与电器] 0808[工学-电气工程] 08[工学] 0805[工学-材料科学与工程（可授工学、理学学位）] 080502[工学-材料学] 

基　　金：The authors gratefully acknowledge Laval University and Total S.A. for their fellowship supports 

主　　题：Ferrofluid Magnetosviscosity Porous medium Volume-average ferrohydrodynamic model Kelvin body force Spin-vorticity coupling 

摘      要：We analyzed the phenomenon of ferrofiuid magnetoviscosity in high-permeability wall-region non-magnetic porous media of the Müller kind. After upscaling the pore-level ferrohydrodynamic model, we obtained a simplified volume-average zero-order axisymmetric model for non-Darcy non-turbulent flow of steady-state isothermal incompressible Newtonian ferrofluids through a porous medium experiencing external constant bulk-flow oriented gradient magnetic field, ferrofluid self-consistent demagnetizing field and induced magnetic field in the solid. The model was explored in contexts plagued by wall flow maldistribution due to low column-to-particle diameter ratios. It was shown that for proper magnetic field arrangement, wall channeling can be reduced by inflating wall flow resistance through magnetovisco-thickening and Kelvin body force density which reroute a fraction of wall flow towards bed core.