scholarly journals On Squeezed Flow of Jeffrey Nanofluid between Two Parallel Disks

2016 ◽  
Vol 6 (11) ◽  
pp. 346 ◽  
Author(s):  
Tasawar Hayat ◽  
Tehseen Abbas ◽  
Muhammad Ayub ◽  
Taseer Muhammad ◽  
Ahmed Alsaedi
2020 ◽  
Vol 142 (8) ◽  
Author(s):  
Ikram Ullah ◽  
Tasawar Hayat ◽  
Ahmed Alsaedi

Abstract This study explores the flow of magnetized nanomaterials between two parallel disks. Novel aspects of activation energy and nonlinear thermal radiation characterized the heat and mass transfer. Nonlinear system of ODEs is obtained via proper variables. Homotopic scheme determines the convergence interval of governing expressions. Plots have been interpreted in order to examine how the temperature and concentration are influenced by various physical variables. Further, surface drag forces and heat and mass transfer rates are computed numerically and analyzed. Our computed analysis depicts that the influence of squeezed and magnetic parameters have reverse effects on temperature.


2018 ◽  
Vol 135 (2) ◽  
pp. 1021-1030 ◽  
Author(s):  
Ikram Ullah ◽  
Muhammad Waqas ◽  
Tasawar Hayat ◽  
Ahmed Alsaedi ◽  
M. Ijaz Khan

2017 ◽  
Vol 24 (07) ◽  
pp. 1750098 ◽  
Author(s):  
ANUM SHAFIQ ◽  
SUMAIRA JABEEN ◽  
T. HAYAT ◽  
A. ALSAEDI

This paper addresses the squeezed flow of third grade fluid between two parallel disks. Heat transfer in present flow is characterized by Cattaneo–Christov theory. Thermal relaxation time effects on the boundary layer is examined. Suitable transformations are invoked for a system of ordinary differential equations. Convergent series solutions are thus obtained using homotopic approach. Influences of different parameters on the velocity and temperature profile are discussed.


2019 ◽  
Vol 139 (3) ◽  
pp. 2067-2077 ◽  
Author(s):  
Tasawar Hayat ◽  
Ikram Ullah ◽  
Taseer Muhammad ◽  
Ahmed Alsaedi

2018 ◽  
Vol 28 (12) ◽  
pp. 2784-2800 ◽  
Author(s):  
Tasawar Hayat ◽  
Tayyaba Ayub ◽  
Taseer Muhammad ◽  
Ahmed Alsaedi ◽  
M. Mustafa

Purpose The purpose of this paper is to construct mathematical model for squeezed flow of carbon-water nanofluid between parallel disks considering Darcy–Forchheimer porous medium. Thermal conductivity of carbon nanotubes is estimated through the well-known Xue model. Such research work is not carried out in the past even in the absence of Darcy–Forchheimer porous space. Forchheimer equation is preferred here to account for both low and high velocity inertial effects. Researchers also found that dispersion of carbon nanotubes in water elevates the thermal conductivity of resulting nanofluid by 100 per cent. Design/methodology/approach Homotopy analysis method (HAM) is used for the convergent series solutions of the governing system. Findings Nusselt number at the lower disk increases when squeezing parameter Sq enlarges. This illustrates that heat transfer rate at the lower wall can be enhanced by increasing the squeezing velocity of the lower disk. The results demonstrate a decreasing trend in temperature profile for increasing volume fraction of carbon nanotubes. Moreover, improvement in heat transfer rate because of existence of carbon nanotubes is also apparent. A significant enhancement in temperature profile is depicted when inertial permeability coefficient is enhanced. Skin friction coefficients at the lower and upper disks are higher for MWCNTs in comparison to the SWCNTs. Originality/value To the best of author’s knowledge, no such consideration has been given in the literature yet.


Author(s):  
Yu-Ming Chu ◽  
M. Ijaz Khan ◽  
Hassan Waqas ◽  
Umar Farooq ◽  
Sami Ullah Khan ◽  
...  

Abstract The utilization of nano-materials in a base fluid is a new dynamic technique to improve the thermal conductivity of base fluids. The suspension of tiny nanoparticles in base fluids is referred to the nano-materials. Nanofluids play a beneficial contribution in the field of nanotechnology, heat treatment enhancement, cooling facilities, biomedicine, bioengineering, radiation therapy and in military fields. The analysis of bioconvection characteristics for unsteady squeezing flow of non-Newtonian Jeffery nanofluid with swimming microorganisms over parallel disks with thermal radiation and activation energy has been studied in this continuation. The motivations for performing current analysis are to inspect the heat transfer enhancement in Jeffrey nanofluid in presence of multiple thermal features. The Jeffrey nanofluid contains motile microorganisms which convey dynamic applications in bio-technology and medical sciences and agricultural engineering. The system comprising differential equations of derivative is restricted to an ordinary one by means of a sufficient dimensionless similarity vector, and then implemented numerically by means of a famous shooting scheme with MATLAB tools. The effect of the significant parameters over the fluid flow is investigated from a physical point of view. The numerical findings of the modeled system are explored in detail using tabular data.


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