Magnetic-fluid flow under DC and AC magnetic fields

Article type: Research Article

Authors: Itahashi, Yuta^a | Hirano, Ryutaro^a | Sawada, Tatsuo^a;

Affiliations: [a] Department of Mechanical Engineering, Keio University, Kohoku–ku, Yokohama, Japan

Correspondence: [*] Corresponding author: Tatsuo Sawada, Department of Mechanical Engineering, Keio University, 3–14–1 Hiyoshi, Kohoku–ku, Yokohama 223–8522, Japan. E-mail: [email protected]

Abstract: This study reports magnetic-fluid flow in a square duct under DC, AC, and DC+AC magnetic fields. We measure the pressure drop under application of different magnetic fields to the flow. Under all magnetic fields, flow resistance increased by forming a cluster, causing the pressure drop and friction factor to also increase. From an FFT analysis of the pressure drop, we obtained different power spectra for AC and DC+AC magnetic fields.

Keywords: Magnetic fluid, oscillating magnetic fields, pressure drop, square duct

DOI: 10.3233/JAE-171105

Journal: International Journal of Applied Electromagnetics and Mechanics, vol. 59, no. 1, pp. 335-340, 2019