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A study on the unsteady flow of two immiscible micropolar and Newtonian fluids through a horizontal channel: A numerical approach

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Abstract.

The unsteady flow of two immiscible micropolar and Newtonian fluids through a horizontal channel is considered. In addition to the classical no-slip and hyper-stick conditions at the boundary, it is assumed that the fluid velocities and shear stresses are continuous across the fluid-fluid interface. Three cases for the applied pressure gradient are considered to study the problem: one with constant pressure gradient and the other two cases with time-dependent pressure gradients, viz. periodic and decaying pressure gradient. The Crank-Nicolson approach has been used to obtain numerical solutions for fluid velocity and microrotation for diverse sets of fluid parameters. The nature of fluid velocities and microrotation with various values of pressure gradient, Reynolds number, ratio of viscosities, micropolarity parameter and time is illustrated through graphs. It has been observed that micropolarity parameter and ratio of viscosities reduce the fluid velocities.

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Authors and Affiliations

  1. Department of Mathematics, Visvesvaraya National Institute of Technology, 440010, Nagpur, India

    M. Devakar & Ankush Raje

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  1. M. Devakar
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  2. Ankush Raje
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Correspondence to M. Devakar.

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Devakar, M., Raje, A. A study on the unsteady flow of two immiscible micropolar and Newtonian fluids through a horizontal channel: A numerical approach. Eur. Phys. J. Plus 133, 180 (2018). https://doi.org/10.1140/epjp/i2018-12011-5

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