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a finite volume study on the effects of electro-hydro-dynamic fluid acceleration on airflow around a cylinder at low reynolds numbers
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نویسنده
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tathiri g. ,parishani h. ,esmaeilzadeh e.
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منبع
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journal of applied fluid mechanics - 2017 - دوره : 10 - شماره : 3 - صفحه:889 -897
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چکیده
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Applying a high-voltage electric field in a flow (electr-ohydrodynamics or ehd) is a highly effective approach to locally accelerate a fluid to a desired speed. in this paper, a finite volume implementation is used to study the fluid flow around a fixed cylinder at a low reynolds number. two pairs of wireplate electrodes are used to generate the electric field for fluid acceleration. two reynolds numbers are considered: re=40, 100. we show that by increasing the reynolds number, the relative effect of ehd is decreased. further, we study the change in drag force due to ehd actuation. finally, we showed that under certain voltage, electrode placement and reynolds number the ehd fluid acceleration does not increase the total drag on the cylinder and yet leads to an increase in the total streamwise momentum transfer by augmenting the velocity at the top of the boundary layer.
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کلیدواژه
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drag force ,laminar boundary layer ,electro-hydro-dynamic fluid acceleration
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آدرس
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islamic azad university, zanjan branch, department of engineering, ایران, university of california irvine, department of earth system science, usa, university of tabriz, department of mechanical engineering, ایران
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پست الکترونیکی
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esmzadeh@tabrizu.ac.ir
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Authors
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