Simultaneous effects of coagulation and variable magnetic field on peristaltically induced motion of Jeffrey nanofluid containing gyrotactic microorganism

• Published in: Microvascular research Vol. 110; pp. 32 - 42
• Main Authors: Bhatti, M.M., Zeeshan, A., Ellahi, R.
• Format: Journal Article
• Language: English
• Published: United States Elsevier Inc 01.03.2017
• Subjects: Bacteria - growth & development; Blood Coagulation; Blood flow; Coagulation; Computer Simulation; Endoscopes; Equipment Design; Friction; Hydrodynamics; Magnetic Fields; Magnetite Nanoparticles; Models, Theoretical; Motion; Nanofluid; Nonlinear Dynamics; Numerical Analysis, Computer-Assisted; Peristalsis; Peristaltic flow; Pressure; Rheology; Temperature; Variable magnetic field; Viscosity; Variable magnetic field; Peristaltic flow; Nanofluid; Coagulation; Blood flow
• ISSN: 0026-2862; 1095-9319
• DOI: 10.1016/j.mvr.2016.11.007

In this article, simultaneous effects of coagulation (blood clot) and variable magnetic field on peristaltically induced motion of non-Newtonian Jeffrey nanofluid containing gyrotactic microorganism through an annulus have been studied. The effects of an endoscope also taken into consideration in our study as a special case. The governing flow problem is simplified by taking the approximation of long wavelength and creeping flow regime. The resulting highly coupled differential equations are solved analytically with the help of perturbation method and series solution have been presented up to second order approximation. The impact of all the sundry parameters is discussed for velocity profile, temperature profile, nanoparticle concentration profile, motile microorganism density profile, pressure rise and friction forces. Moreover, numerical integration is also used to evaluate the expressions for pressure rise and friction forces for outer tube and inner tube. It is found that velocity of a fluid diminishes near the walls due to the increment in the height of clot. However, the influence of magnetic field depicts opposite behavior near the walls. •Coagulation and variable magnetic field effects are considered.•The fluid motion is considered as sinusoidal (peristaltic) in the presence of endoscopy.•The non-Newtonian fluid contains the nanoparticles and gyrotactic microorganism.•Homotopy perturbation method (HPM) is used to obtain the series for the resulting nonlinear coupled differential equations.•Numerical integration is used to obtain the expression for pressure rise and friction forces.