On the Flow of a Ferromagnetic Fluid in a Circular Pipe : Report 1, Flow in a Uniform Magnetic Field

概要

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To clarify the effects of a longitudinal magnetic field on the ferromagnetic fluid low in a circular pipe, the pressure drop was measured in the range of Reynolds numbers Re=300~8000 and the magnetic fields H=0~0.796×105(A/m) by using a ferricolloid W-35. It is clearly shown that the coefficient of frictional resistance increases with the magnetic field, but the increasing rate decreases with an increase of Re in laminar flow regime and remains at nearly constant values in turbulent flow regime. An approximate analysis of laminar flow is also developed by using the Shliomis basic equations. The results of the analysis explain the experimental results in the laminar flow regime qualitatively by correcting the effect of adhesion layer of the surfactant.
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