lorentz forces
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2022 ◽  
Vol 12 (1) ◽  
Author(s):  
Adnan ◽  
Waqas Ashraf ◽  
Umar Khan ◽  
Amnah S. Al-Johani ◽  
Naveed Ahmed ◽  
...  

AbstractThe dynamics of nanofluid by considering the role of imposed Lorentz forces, thermal radiations and velocity slip effects over a vertically convectively heated surface is a topic of huge interest. Therefore, the said study is conducted for Al2O3-H2O nanofluid. Mathematical modelling of the problem is done via nanofluid effective correlations comprising the influences of freezing temperature, molecular diameter and similarity transformations. The results for multiple parameters are plotted and provide comprehensive discussion. From the analysis, it is examined that Al2O3-H2O nanofluid motion drops by strengthening Lorentz forces. The temperature in the nanofluid (Al2O3-H2O) is improved by inducing viscous dissipation effects (Ec number), surface convection (Biot number) and thermal radiations (Rd). Moreover, the shear stresses at the surface decreased due to higher magnetic field effects and rises due to velocity slip. A significant rise in Local Nusselt number is observed due to thermal radiations and Biot effects. Finally, enhanced heat transport mechanism in Al2O3-H2O is examined than a conventional liquid. Therefore, nanofluids are better for industrial applications and the uses of conventional liquids are limited due to low thermal conductivity.


Author(s):  
Assad Ayub ◽  
Zulqurnain Sabir ◽  
Syed Zahir Hussain Shah ◽  
Hafiz A. Wahab ◽  
R. Sadat ◽  
...  

2021 ◽  
Vol 33 (12) ◽  
pp. 127115
Author(s):  
Raúl Rechtman ◽  
Guadalupe Huelsz ◽  
Joel Román ◽  
Aldo Figueroa

Heat Transfer ◽  
2021 ◽  
Author(s):  
Hussain Basha ◽  
Naresh Kumar Nedunuri ◽  
Gudala Janardhana Reddy ◽  
Sreenivasulu Ballem

PLoS ONE ◽  
2021 ◽  
Vol 16 (7) ◽  
pp. e0251744
Author(s):  
Zahir Shah ◽  
Anwar Saeed ◽  
Imran Khan ◽  
Mahmoud M. Selim ◽  
Ikramullah ◽  
...  

The free convective hybrid nanofluid (Fe3O4+MWCNT/H2O) magnetized non-Darcy flow over a porous cylinder is examined by considering the effects constant heat source and uniform ambient magnetic field. The developed coupled PDEs (partial differential equations) are numerically solved using the innovative computational technique of control volume finite element method (CVFEM). The impact of increasing strength of medium porousness and Lorentz forces on the hybrid nanofluid flow are presented through contour plots. The variation of the average Nusselt number (Nuave) with the growing medium porosity, buoyancy forces, radiation parameter, and the magnetic field strength is presented through 3-D plots. It is concluded that the enhancing medium porosity, buoyancy forces and radiation parameter augmented the free convective thermal energy flow. The rising magnetic field rises the temperature of the inner wall more drastically at a smaller Darcy number. An analytical expression for Nusselt number (Nuave) is obtained which shows its functional dependence on the pertinent physical parameters. The augmenting Lorentz forces due to the higher estimations of Hartmann retard the hybrid nanoliquid flow and hence enhance the conduction.


Author(s):  
Zahir Shah ◽  
Ikramullah ◽  
Poom Kumam ◽  
Mahmoud M. Selim ◽  
Ahmed Alshehri
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