Asymptotic solutions for the asymmetric flow in a channel with porous retractable walls under a transverse magnetic field

doi:10.1007/s10483-018-2355-6

Abstract

Abstract:

The self-similarity solutions of the Navier-Stokes equations are constructed for an incompressible laminar flow through a uniformly porous channel with retractable walls under a transverse magnetic field. The flow is driven by the expanding or contracting walls with different permeability. The velocities of the asymmetric flow at the upper and lower walls are different in not only the magnitude but also the direction. The asymptotic solutions are well constructed with the method of boundary layer correction in two cases with large Reynolds numbers, i.e., both walls of the channel are with suction, and one of the walls is with injection while the other one is with suction. For small Reynolds number cases, the double perturbation method is used to construct the asymptotic solution. All the asymptotic results are finally verified by numerical results.

Key words: porous and retractable channel, Stokes flow, filtration, atherosclerosis, asymptotic solution, asymmetric flow, magnetic field, laminar flow

2010 MSC Number:

76M45
76D10

Hongxia GUO, Ping LIN, Lin LI. Asymptotic solutions for the asymmetric flow in a channel with porous retractable walls under a transverse magnetic field. Applied Mathematics and Mechanics (English Edition), 2018, 39(8): 1147-1164.

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References

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