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Issue 113, 2016, Issue in Progress
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Rotation induced by uniform and non-uniform magnetic fields in a conducting fluid carrying an electric current

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Abstract

We study the dynamics of a conducting fluid carrying (i) a uniform current in the presence of a non-uniform magnetic field or (ii) carrying a non-uniform current in the presence of a uniform magnetic field, using particle image velocimetry (PIV). Our results show that the average angular velocity of the induced rotation has a power-law dependence on the electric current passing through the fluid with an exponent ≈2/3, in excellent agreement with our simulation results, for the same system. To explain the experimental observations we explore all possibilities for inducing rotation in a fluid carrying an electric current. Our theoretical discussion indicates two scenarios wherein applying electric/magnetic field on a current-carrying fluid produces rotational vortices: (i) applying a non-uniform magnetic field in the presence of an electric current and, (ii) applying a magnetic field in the presence of a non-uniform electric current. These two theoretical scenarios for inducing rotation by applying external fields agree well with our experimental observations and simulation results.

Graphical abstract: Rotation induced by uniform and non-uniform magnetic fields in a conducting fluid carrying an electric current

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Publication details

The article was received on 30 Sep 2016, accepted on 24 Nov 2016 and first published on 24 Nov 2016


Article type: Paper
DOI: 10.1039/C6RA24346K
Citation: RSC Adv., 2016,6, 112641-112645
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    Rotation induced by uniform and non-uniform magnetic fields in a conducting fluid carrying an electric current

    R. Shirsavar, M. Nasiri, A. Amjadi, A. Nejati, S. O. Sobhani and M. Habibi, RSC Adv., 2016, 6, 112641
    DOI: 10.1039/C6RA24346K

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