scholarly journals Unsteady transient slip flow of Williamson nanofluid containing gyrotactic microorganism and activation energy

2020 ◽  
Vol 59 (6) ◽  
pp. 4315-4328 ◽  
Author(s):  
A. Aldabesh ◽  
Sami Ullah Khan ◽  
Danial Habib ◽  
Hassan Waqas ◽  
Iskander Tlili ◽  
...  
Keyword(s):  
Activation Energy ◽  
Slip Flow ◽  
Gyrotactic Microorganism

scholarly journals Slip flow of Jeffrey nanofluid with activation energy and entropy generation applications

2021 ◽  
Vol 13 (3) ◽  
pp. 168781402110065
Author(s):  
Hu Ge-JiLe ◽  
Sumaira Qayyum ◽  
Faisal Shah ◽  
M Ijaz Khan ◽  
Sami Ullah Khan
Keyword(s):  
Activation Energy ◽  
Entropy Generation ◽  
Slip Flow ◽  
Graphical Analysis ◽  
Thermal Engineering ◽  
Bejan Number ◽  
Nano Technology ◽  
Flow Equations ◽  
Jeffrey Nanofluid ◽  
Buongiorno Model

The growing development in the thermal engineering and nano-technology, much attention has been paid on the thermal properties of nanoparticles which convey many applications in industrial, technological and medical era of sciences. The noteworthy applications of nano-materials included heat transfer enhancement, thermal energy, solar systems, cooling of electronics, controlling the heat mechanisms etc. Beside this, entropy generation is an optimized scheme which reflects significances in thermodynamics systems to control the higher energy efficiency. On this end, present work presents the slip flow of Jeffrey nanofluid over a stretching sheet with applications of activation energy and viscous dissipation. The entropy generation features along with Bejan number significance is also addressed in present analysis. Buongiorno model of nanofluid is used to discuss the heat and mass transfer. The formulated flow equations are attained into non-dimensional form. An appropriate ND MATHEMATICA built-in scheme is used to find the solution. The solution confirmation is verified by performing the error analysis. For developed flow model and impacted parameters, a comprehensive graphical analysis is performed. It is observed that slip phenomenon is used to decays the velocity profile. Temperature and concentration are in direct relation with Brownian motion parameter and activation energy respectively. Entropy and Bejan number have same results for greater diffusion parameter.

A higher order slip flow of generalized Micropolar nanofluid with applications of motile microorganisms, nonlinear thermal radiation and activation energy

2021 ◽  
pp. 2150095
Author(s):  
Usman ◽  
M. Ijaz Khan ◽  
Sami Ullah Khan ◽  
Abuzar Ghaffari ◽  
Yu-Ming Chu ◽  
...  
Keyword(s):  
Activation Energy ◽  
Thermal Radiation ◽  
Micropolar Fluid ◽  
Fluid Model ◽  
Slip Flow ◽  
Higher Order ◽  
Nonlinear Thermal Radiation ◽  
Coupled Equations ◽  
Flow Parameters ◽  
Micropolar Nanofluid

This communication aims to develop the thermal flow model for generalized micropolar nanofluid with insensitive applications of bioconvection, activation energy and nonlinear thermal radiation. The generalized micropolar fluid model is the extension of traditional micropolar fluid model with viscoelastic relations. The viscous nature of non-Newtonian micropolar material can be successfully predicted with help of this model. The motivating idea for considering the motile microorganisms is to control the nanoparticles suspension effectively. The higher order slip relations are incorporated to examine the bio-convective phenomenon. The simplified coupled equations in terms of non-dimensional variables are numerically treated with shooting scheme. The reliable graphical outcomes are presented for flow parameters governed to the transported problem. The flow pattern of each parameter is highlighted in view of viscous nature of micropolar fluid.

Modeling and theoretical investigation of curved parabolized surface of second-order velocity slip flow: Combined analysis of entropy generation and activation energy

2020 ◽  
Vol 34 (33) ◽  
pp. 2050383
Author(s):  
Sumaira Qayyum ◽  
M. Ijaz Khan ◽  
Wathek Chammam ◽  
W. A. Khan ◽  
Zulfiqar Ali ◽  
...  
Keyword(s):  
Activation Energy ◽  
Entropy Generation ◽  
Fluid Velocity ◽  
Slip Flow ◽  
Mhd Flow ◽  
Velocity Slip ◽  
Second Order ◽  
Bejan Number ◽  
Biot Numbers ◽  
Chemical Reaction Parameter

Here our purpose is to explore the entropy generation in nanofluid MHD flow by curved stretching sheet; second-order slip is considered. Additional effects of viscous dissipation, Joule heating, and activation energy are taken. Temperature and concentration boundary conditions are considered convectively. For convergence of series solution NDSolve MATHEMATICA is used. Velocity, Bejan number, concentration, temperature, and entropy generation graphs are sketched for important parameters. For greater estimations of first- and second-order velocity slip parameters fluid velocity reduces. The thermal and solutal Biot numbers enhance the temperature and concentration, respectively. The concentration also has direct relation with activation energy. Entropy generation reduces for chemical reaction parameter and first- and second-order slip parameters.

Analysis of Buongiorno’s nanofluid model in marangoni convective flow with gyrotactic microorganism and activation energy

2021 ◽  
pp. 2150072
Author(s):  
M. Ijaz Khan ◽  
Yu-Ming Chu ◽  
Faris Alzahrani ◽  
Aatef Hobiny
Keyword(s):  
Activation Energy ◽  
Nusselt Number ◽  
Heat Source ◽  
Marangoni Number ◽  
Marangoni Convection ◽  
Mhd Flow ◽  
Momentum Equation ◽  
Number Magnitude ◽  
Gyrotactic Microorganism ◽  
Source Sink

This communication is to analyze the Marangoni convection MHD flow of nanofluid. Marangoni convection is very useful physical phenomena in presence of microgravity conditions which is generated by gradient of surface tension at interface. We have also studied the swimming of migratory gyrotactic microorganisms in nanofluid. Flow is due to rotation of disk. Heat and mass transfer equations are examined in detail in the presence of heat source sink and Joule heating. Nonlinear mixed convection effect is inserted in momentum equation. Appropriate transformations are applied to find system of equation. HAM technique is used for convergence of equations. Radial and axial velocities, concentration, temperature, motile microorganism profile, Nusselt number and Sherwood number are sketched against important parameters. Marangoni ratio parameter and Marangoni number are increasing functions of axial and radial velocities. Temperature rises for Marangoni number and heat source sink parameter. Activation energy and chemical reaction rate parameter have opposite impact on concentration profile. Motile density profile decays via Peclet number and Schmidt number. Magnitude of Nusselt number enhances via Marangoni ratio parameter.

Joule heating, activation energy and modified diffusion analysis for 3D slip flow of tangent hyperbolic nanofluid with gyrotactic microorganisms

2021 ◽  
pp. 2150278
Author(s):  
Yu-Ming Chu ◽  
Hassan Waqas ◽  
Sajjad Hussain ◽  
Sumeira Yasmein ◽  
Sami Ullah Khan ◽  
...  
Keyword(s):  
Activation Energy ◽  
Joule Heating ◽  
Thermal Field ◽  
Current Model ◽  
Slip Flow ◽  
Three Dimensional ◽  
Local Heat ◽  
Porous Space ◽  
Local Skin ◽  
Similarity Transformations

Current communication aims to examine the novel thermal consequences of thermal radiation, Joule heating and activation energy in bioconvection flow of tangent hyperbolic nanofluid. The flow is developed by a three-dimensional (3D) extending surface in presence of porous space. The heat and mass transfer inspection in non-Newtonian fluid flow is inspected in laws of modified flux relations. The Brownian movement and thermophoresis diffusions are also accounted for current analysis. The governing formulated frameworks are simplified by appropriate similarity transformations. A familiar shooting scheme for obtaining the numerical outcomes to the nonlinear system is carried out. The graphical results are obtained with the aid of shooting technique. Flow of fluid, thermal field, concentration of species and microorganism’s field are conducted for tangent hyperbolic fluid. Furthermore, the significance of various noteworthy variables on velocity field, thermal field, solutal field of nanomaterials, microorganisms’ profile, local skin friction coefficients, local heat flux rate, local Sherwood number and local microorganisms density number is scrutinized in graphical and tabular structure. The importance of current model is in the field of nanotechnology and bioengineering.

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