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ISSN Online: 2688-7231

ISBN Online: 978-1-56700-524-0

Proceedings of the 26thNational and 4th International ISHMT-ASTFE Heat and Mass Transfer Conference December 17-20, 2021, IIT Madras, Chennai-600036, Tamil Nadu, India
December, 17-20, 2021, IIT Madras, Chennai, India

Electro-Magneto-Hydrodynamics of Shear Driven Microscale Flows

Get access (open in a dialog) DOI: 10.1615/IHMTC-2021.1710
pages 1127-1131

Аннотация

Electromagnetic field actuated flows within microchannels is of significant importance in the field of microfluidics. In the present work, a mathematical model is derived for the micro scale electroosmotic Couette flow under the influence of combined electromagnetic field. Combined effects of longitudinal and lateral electric fields along with vertical magnetic field are taken into account while solving the governing equations of fluid flow. Velocity profiles under the varying influence of parameters like electromagnetic force and electroviscous number are shown. The overall flow rate enhancement in the presence of electromagnetic effect is noted up to the value of Hartmann number (Ha) = 1.5, beyond which the flow rate is observed to decrease. Hence, the magnetic field effect proves to be beneficial only up to a certain magnitude. The flow is noted to augment always with increase in the transverse electric field. It is also observed that after a certain value of the upper plate velocity, the shear force plays the dominant role and there is no enhancement in the flow rate due to the electromagnetic field. The findings may prove significant for design and development of microscale shear flow actuation technologies.