scholarly journals Magnetohydrodynamic stratified bioconvective flow of micropolar nanofluid due to gyrotactic microorganisms

AIP Advances ◽  
2019 ◽  
Vol 9 (2) ◽  
pp. 025208 ◽  
Author(s):  
S. M. Atif ◽  
S. Hussain ◽  
M. Sagheer
Keyword(s):  
Gyrotactic Microorganisms ◽  
Micropolar Nanofluid ◽  
Bioconvective Flow

Mixed Bioconvective Flow Over a Wedge in Porous Media Drenched with a Nanofluid

2019 ◽  
Vol 8 (8) ◽  
pp. 1692-1703 ◽  
Author(s):  
Ali J. Chamkha ◽  
Hossam A. Nabwey ◽  
Z.M.A. Abdelrahman ◽  
A.M. Rashad
Keyword(s):  
Mathematical Model ◽  
Volume Fraction ◽  
Wedge Angle ◽  
Nanoparticle Volume Fraction ◽  
Gyrotactic Microorganisms ◽  
Convection Regime ◽  
Convective Parameter ◽  
Implicit Finite Difference ◽  
Bioconvective Flow ◽  
Vertical Wedge

A mathematical model is accentuated the mixed bioconvective flow on a vertical wedge in a Darcy porous medium filled with a nanofluid containing both nanoparticles and gyrotactic microorganisms. Thermophoresis and Brownian motion impacts are addressed to consolidate energy and concentration equations with passivelycontrolled boundary conditions. A mixed convective parameter for the whole regime of the mixed convective is appointed. The system of governing partial differential equations is converted into a non-similar set, which are then solved by an implicit finite difference method. By taking the impacts of the varying pertinent parameters, namely, the bioconvection nanofluids and wedge angle parameters in the entire mixed convection regime, the numerical results are analyzed graphically for the dimensionless the velocity, temperature, nanoparticle volume fraction and the density motile microorganisms profiles as well as the local Nusselt and motile microorganism numbers.

scholarly journals Onset of gyrotactic microorganisms in MHD Micropolar nanofluid flow with partial slip and double stratification

2020 ◽  
Vol 32 (6) ◽  
pp. 2741-2751 ◽  
Author(s):  
Iskander Tlili ◽  
Muhammad Ramzan ◽  
Habib Un Nisa ◽  
Meshal Shutaywi ◽  
Zahir Shah ◽  
...  
Keyword(s):  
Partial Slip ◽  
Double Stratification ◽  
Nanofluid Flow ◽  
Gyrotactic Microorganisms ◽  
Micropolar Nanofluid

Magnetohydrodynamic (MHD) stratified bioconvective flow of nanofluid due to gyrotactic microorganisms

2017 ◽  
Vol 28 (1) ◽  
pp. 288-298 ◽  
Author(s):  
A. Alsaedi ◽  
M. Ijaz Khan ◽  
M. Farooq ◽  
Numra Gull ◽  
T. Hayat
Keyword(s):  
Gyrotactic Microorganisms ◽  
Bioconvective Flow

scholarly journals Electromagnetohydrodynamic bioconvective flow of binary fluid containing nanoparticles and gyrotactic microorganisms through a stratified stretching sheet

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Abdullah Dawar ◽  
Anwar Saeed ◽  
Saeed Islam ◽  
Zahir Shah ◽  
Wiyada Kumam ◽  
...  
Keyword(s):  
Rayleigh Number ◽  
Stretching Sheet ◽  
Stretching Surface ◽  
Gyrotactic Microorganisms ◽  
Binary Fluid ◽  
Electrically Conducting ◽  
Fluid Velocities ◽  
The Subject ◽  
Bioconvective Flow ◽  
Buoyancy Ratio

AbstractBioconvection has recently been the subject of dispute in a number of biotechnological fields that depend on fluids and their physical properties. When mixed nanofluids are subjected to heat and mass transmission, the process of bioconvection occurs. This attempt conveys the theoretical analysis of two-dimensional electrically conducting and magnetically susceptible binary fluid containing nanoparticles and gyrotactic microorganisms past a stratified stretching surface. Furthermore binary chemical reaction, thermal radiation, and activation energy are taken into assumptions. The analytical solution based on HAM has been performed. The convergence of HAM is presented with the help of figures. The present study is compared with previously published results and has established an excessive agreement which validate the present study. It is perceived that the presence and absence of an electric field influences the variations in fluid velocities due to presence of magnetic field. The micropolar constant heightens the velocity and microrotation of the fluid flow. The buoyancy parameter and bioconvection Rayleigh number diminish the velocity function while these parameters show dual impact on microrotation function. The skin friction and couple stress escalates with the increasing buoyancy ratio parameter and bioconvection Rayleigh number.

Mixed Bioconvective Flow Over a Wedge in Porous Media Drenched with a Nanofluid

2020 ◽  
Vol 9 (1) ◽  
pp. 24-35
Author(s):  
Ali J. Chamkha ◽  
Hossam A. Nabwey ◽  
Z. M. A. Abdelrahman ◽  
A. M. Rashad
Keyword(s):  
Mathematical Model ◽  
Volume Fraction ◽  
Wedge Angle ◽  
Nanoparticle Volume Fraction ◽  
Gyrotactic Microorganisms ◽  
Convection Regime ◽  
Convective Parameter ◽  
Implicit Finite Difference ◽  
Bioconvective Flow ◽  
Vertical Wedge

A mathematical model is accentuated the mixed bioconvective flow on a vertical wedge in a Darcy porous medium filled with a nanofluid containing both nanoparticles and gyrotactic microorganisms. Thermophoresis and Brownian motion impacts are addressed to consolidate energy and concentration equations with passivelycontrolled boundary conditions. A mixed convective parameter for the whole regime of the mixed convective is appointed. The system of governing partial differential equations is converted into a non-similar set, which are then solved by an implicit finite difference method. By taking the impacts of the varying pertinent parameters, namely, the bioconvection nanofluids and wedge angle parameters in the entire mixed convection regime, the numerical results are analyzed graphically for the dimensionless the velocity, temperature, nanoparticle volume fraction and the density motile microorganisms profiles as well as the local Nusselt and motile microorganism numbers.

scholarly journals Comparative Analysis MHD Bioconvective Flow of Micropolar Nanofluid in Porous Medium

2021 ◽  
Vol 39 (3) ◽  
pp. 727-736
Author(s):  
Mekonnen Shiferaw Ayano
Keyword(s):  
Mass Transfer ◽  
Porous Medium ◽  
Transfer Rate ◽  
Mass Transfer Rate ◽  
Slowing Down ◽  
Micropolar Nanofluid ◽  
Nanoparticles Concentration ◽  
Greenhouse Effects ◽  
Micro Organisms ◽  
Bioconvective Flow

The present study dealt with heat and mass transfer rate, and motile micro-organisms for convective micropolar nanofluid flow in a porous medium. The nanofluid contains the influence of both Brownian motion and thermodiffusion (thermophoresis). The problem considered finds applications in the areas of engineering such as reducing greenhouse effects and in the pharmaceutical applications enhancing mixing and slowing down settling particles can be mentioned. The numerical results are obtained and discussed. The results obtained suggest that micropolar fluids enhance the flow and decrease the temperature, nanoparticles concentration and gyrotactic microorganisms concentration profiles compared to viscous fluid. It is also noted that Hall parameter increases skin friction, the heat transfer rate, the mass transfer rate and density of the motile microorganisms.

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