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Open AccessArticle

Effect of the Variable Viscosity on the Peristaltic Flow of Newtonian Fluid Coated with Magnetic Field: Application of Adomian Decomposition Method for Endoscope

1
MCS, National University of Sciences and Technology, Islamabad 44000, Pakistan
2
Department of Mathematics, Faculty of Science, University of Jeddah, Jeddah 21589, Saudi Arabia
3
Department of Mathematics, Faculty of Education, Ain Shams University, Roxy, Cairo 11757, Egypt
4
Department of Mathematics, Quaid-i-Azam University 45320, Islamabad 44000, Pakistan
*
Author to whom correspondence should be addressed.
Coatings 2019, 9(8), 524; https://doi.org/10.3390/coatings9080524
Received: 20 July 2019 / Revised: 10 August 2019 / Accepted: 13 August 2019 / Published: 16 August 2019
(This article belongs to the Special Issue Recent Trends in Coatings and Thin Film–Modeling and Application)
In the present analysis, peristaltic flow was discussed for MHD Newtonian fluid through the gap between two coaxial tubes, where the viscosity of the fluid is treated as variable. In addition, the inner tube was considered to be at rest, while the outer tube had the sinusoidal wave traveling down its motion. Further, the assumptions of long wave length and low Reynolds number were taken into account for the formulation of the problem. A closed form solution is presented for general viscosity using the Adomian decomposition method. Numerical illustrations that show the physical effects and pertinent features were investigated for different physical included phenomenon. It was found that the pressure rise increases with an increase in Hartmann number, and frictional forces for the outer and inner tube decrease with an increase in Hartmann number when the viscosity is constant. It was also observed that the size of the trapping bolus decreases with an increase in Hartmann number, and increases with an increase in amplitude ratio when the viscosity is parameter. View Full-Text
Keywords: peristaltic flow; an endoscope; variable viscosity; Adomian solutions; different wave forms peristaltic flow; an endoscope; variable viscosity; Adomian solutions; different wave forms
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Akram, S.; H. Aly, E.; Afzal, F.; Nadeem, S. Effect of the Variable Viscosity on the Peristaltic Flow of Newtonian Fluid Coated with Magnetic Field: Application of Adomian Decomposition Method for Endoscope. Coatings 2019, 9, 524.

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