| Ferrofluid magnetoviscous control of wall flow channeling in oorous media |
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| 作者姓名： | Faical Larachi Damien Desvigne |
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| 作者单位： | Department of Chemical Engineering, Laval University, Que. G1K 7P4, Canada |
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| 基金项目： | Acknowledgements The authors gratefully acknowledge Laval University and Total S.A. for their fellowship supports. |
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| 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.
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| 关 键 词： | 多孔介质 铁磁流体 磁粘性控制 壁流 沟道效应 |
| 修稿时间： | 2006-04-182006-12-05 |
Ferrofluid magnetoviscous control of wall flow channeling in oorous media |
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| Faical Larachi Damien Desvigne.Ferrofluid magnetoviscous control of wall flow channeling in oorous media[J].China Particuology,2007,5(1):50-60. |
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| Abstract: | |
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| Keywords: | Ferrofluid Magnetosviscosity Porous medium Volume-average ferrohydrodynamic model Kelvin body force Spin-vorticity coupling |
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