Convective nonlinear thermally developed flow of thixotropic nanoliquid configured by Riga surface with gyrotactic microorganism and activation energy: A bio-technology and thermal extrusion model

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.

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Maxwell time-dependent nanofluid flow over a wedge covered with gyrotactic microorganism: An activation energy process

International Journal of Ambient Energy ◽

10.1080/01430750.2021.1969274 ◽

2021 ◽

pp. 1-23

Author(s):

Hassan Waqas ◽

Umair Manzoor ◽

Sajjad Hussain ◽

M. M. Bhatti

Keyword(s):

Activation Energy ◽

Time Dependent ◽

Nanofluid Flow ◽

Energy Process ◽

Gyrotactic Microorganism

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To promote radiation electrical MHD activation energy thermal extrusion manufacturing system efficiency by using Carreau-Nanofluid with parameters control method

Energy ◽

10.1016/j.energy.2017.05.004 ◽

2017 ◽

Vol 130 ◽

pp. 486-499 ◽

Cited By ~ 203

Author(s):

Kai-Long Hsiao

Keyword(s):

Activation Energy ◽

Manufacturing System ◽

Control Method ◽

System Efficiency ◽

Carreau Nanofluid ◽

Thermal Extrusion

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Bioconvection in Cross Nano-Materials with Magnetic Dipole Impacted by Activation Energy, Thermal Radiation, and Second Order Slip

Symmetry ◽

10.3390/sym12061019 ◽

2020 ◽

Vol 12 (6) ◽

pp. 1019

Author(s):

Zahra Abdelmalek ◽

Kamel Al-Khaled ◽

Hassan Waqas ◽

A. Aldabesh ◽

Sami Ullah Khan ◽

...

Keyword(s):

Activation Energy ◽

Thermal Radiation ◽

Magnetic Dipole ◽

Second Order ◽

Nonlinear Thermal Radiation ◽

Nano Materials ◽

Flow Equations ◽

Radiation Activation ◽

Magnetic Nanomaterial ◽

Gyrotactic Microorganism

Ferro liquids derive their magneto–viscous behavior from the suspended magnetic nanomaterial that enables tunable changes in temperature, as well as nano-structured fluid characteristics. A theoretical model that depicts the bioconvection flow of cross nanofluid with a magnetic dipole subjected to a cylindrical surface was developed and numerically solved. The model encountered nonlinear thermal radiation, activation energy, and second order slip. The flow equations were reduced and are presented in dimensionless forms, and they were solved numerically using the shooting technique, which is a built-in feature of MatLab. The model encountered symmetrical constraints for predicting velocity, temperature, concentration, and gyrotactic microorganism distribution and profiles. Moreover, the numerical values were computed for local Nusselt number, local Sherwood number, and motile density number against each physical parameter.

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Bioconvection flow in accelerated couple stress nanoparticles with activation energy: bio-fuel applications

Scientific Reports ◽

10.1038/s41598-021-82209-0 ◽

2021 ◽

Vol 11 (1) ◽

Author(s):

Sami Ullah Khan ◽

Kamel Al-Khaled ◽

A. Aldabesh ◽

Muhammad Awais ◽

Iskander Tlili

Keyword(s):

Activation Energy ◽

Couple Stress ◽

Fluid Model ◽

Flow Characteristics ◽

Periodic Oscillation ◽

Buongiorno’S Model ◽

Nanoparticles Concentration ◽

Flow Domain ◽

Gyrotactic Microorganism ◽

Accelerated Flow

AbstractOn the account of significance of bioconvection in biotechnology and several biological systems, valuable contributions have been performed by scientists in current decade. In current framework, a theoretical bioconvection model is constituted to examine the analyzed the thermally developed magnetized couple stress nanoparticles flow by involving narrative flow characteristics namely activation energy, chemical reaction and radiation features. The accelerated flow is organized on the periodically porous stretched configuration. The heat performances are evaluated via famous Buongiorno’s model which successfully reflects the important features of thermophoretic and Brownian motion. The composed fluid model is based on the governing equations of momentum, energy, nanoparticles concentration and motile microorganisms. The dimensionless problem has been solved analytically via homotopic procedure where the convergence of results is carefully examined. The interesting graphical description for the distribution of velocity, heat transfer of nanoparticles, concentration pattern and gyrotactic microorganism significance are presented with relevant physical significance. The variation in wall shear stress is also graphically underlined which shows an interesting periodic oscillation near the flow domain. The numerical interpretation for examining the heat mass and motile density transfer rate is presented in tubular form.

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