Control of flow and suppression of separation for Couette-Poiseuille hydrodynamics of ferrofluids using tunable magnetic fields

Ghosh Dibyendu; Das Prasanta K.

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Control of flow and suppression of separation for Couette-Poiseuille hydrodynamics of ferrofluids using tunable magnetic fields

机译：使用可调谐磁场控制煤矸石水动力学分离的流动和抑制

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The present study reports unidirectional laminar flow of ferrofluids between parallel plate channels under the action of a homogeneous magnetic field. The applied field is found to uniquely modify the local velocity distribution and to reduce the effect of both adverse and favorable pressure gradients. We find that it is possible to control the flow separation by varying the magnetic field strength within a certain range of adverse pressure gradients. We also discuss the effect of the magnetization relaxation time scale and volume fraction of the solid magnetic particles on the flow phenomenon. Finally, we propose an analytical solution which provides closed form expressions for velocity and spin field that are in good agreement with the numerically obtained results. Published under license by AIP Publishing.

机译：本研究报告了在均匀磁场的作用下平行板通道之间的铁磁流体的单向层流。发现所施加的字段唯一地修改局部速度分布，并减少不利和有利的压力梯度的效果。我们发现，通过在一定范围的不利压力梯度内改变磁场强度，可以控制流动分离。我们还讨论了磁化松弛时间尺度和固体磁性颗粒体积分数对流动现象的影响。最后，我们提出了一种分析解决方案，其为速度和旋转场提供闭合形式的表达，与数值获得的结果吻合良好。通过AIP发布在许可证下发布。

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来源
《Physics of fluids》 |2019年第8期|共11页
作者
Ghosh Dibyendu; Das Prasanta K.;
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Indian Inst Technol Kharagpur Dept Mech Engn Kharagpur 721302 W Bengal India;

Indian Inst Technol Kharagpur Dept Mech Engn Kharagpur 721302 W Bengal India;

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正文语种 eng
中图分类流体力学;
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1. 静态磁场对分离结晶中熔体流动的影响 [J] . 彭岚, 龚欢中国有色金属学报（英文版） . 2015,第003期
2. 静态磁场对分离结晶中熔体流动的影响（英文） [J] . 彭岚, 龚欢中国有色金属学报：英文版 . 2015,第003期
3. Control of flow and suppression of separation for Couette-Poiseuille hydrodynamics of ferrofluids using tunable magnetic fields [J] . Ghosh Dibyendu, Das Prasanta K. Physics of fluids . 2019,第8期

机译：使用可调谐磁场控制煤矸石水动力学分离的流动和抑制
4. Investigation into the thermo-hydrodynamics of ferrofluid flow under the influence of constant and alternating magnetic field by InfraRed Thermography [J] . Shyam Sudip, Mehta Balkrishna, Mondal Pranab K., International Journal of Heat and Mass Transfer . 2019,第JUNa期

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6. Control of Flow Separation over a Circular Cylinder with Electro-Magnetic Fields: Numerical Simulation [C] . Brian H. Dennis, George S. Dulikravich, Shinobu Yoshimura Computational Mechanics . 2004

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7. Nonmagnetic particle separation using ferrofluids controlled by magnetic fields. [D] . Forte, James Andrew. 2009

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Control of flow and suppression of separation for Couette-Poiseuille hydrodynamics of ferrofluids using tunable magnetic fields

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