2018
DOI: 10.1115/1.4040972
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Starting Poiseuille Flow in a Circular Tube With Two Immiscible Fluids

Abstract: Starting flow due to a suddenly applied pressure gradient in a circular tube containing two immiscible fluids is solved using eigenfunction expansions. The orthogonality of the eigenfunctions is developed for the first time for circular composite regions. The problem, which is pertinent to flow lubricated by a less viscous near-wall fluid, depends on the ratio of the radius of the core region to that of the tube, and the ratios of dynamic and kinematic viscosities of the two fluids. In general, a higher lubric… Show more

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Cited by 5 publications
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