Unsteady flow of a Maxwell hybrid nanofluid past a stretching/shrinking surface with thermal radiation effect

2021 ◽  
Vol 42 (10) ◽  
pp. 1511-1524
Author(s):  
N. A. Zainal ◽  
R. Nazar ◽  
K. Naganthran ◽  
I. Pop
Keyword(s):  
Unsteady Flow ◽  
Thermal Radiation ◽  
Radiation Effect ◽  
Hybrid Nanofluid ◽  
Shrinking Surface ◽  
Thermal Radiation Effect

scholarly journals MHD mixed convection flow of a hybrid nanofluid past a permeable vertical flat plate with thermal radiation effect

2021 ◽  
Author(s):  
Nur Syahirah Wahid ◽  
Norihan Md Arifin ◽  
Najiyah Safwa Khashi'ie ◽  
Ioan Pop ◽  
Norfifah Bachok ◽  
...  
Keyword(s):  
Mixed Convection ◽  
Thermal Radiation ◽  
Flat Plate ◽  
Radiation Effect ◽  
Convection Flow ◽  
Hybrid Nanofluid ◽  
Mixed Convection Flow ◽  
Thermal Radiation Effect ◽  
Vertical Flat Plate

scholarly journals Numerical Analysis of Cu + Al 2 O 3 / H 2 O Hybrid Nanofluid of Streamwise and Cross Flow with Thermal Radiation Effect: Duality and Stability

2021 ◽  
Vol 2021 ◽  
pp. 1-12
Author(s):  
Sumera Dero ◽  
Liaquat Ali Lund ◽  
Zahir Shah ◽  
Ebenezer Bonyah ◽  
Wejdan Deebani
Keyword(s):  
Differential Equations ◽  
Thermal Radiation ◽  
Radiation Effect ◽  
Nonlinear Partial Differential Equations ◽  
Upper And Lower Solutions ◽  
Temporal Stability ◽  
Cross Flow ◽  
Hybrid Nanofluid ◽  
Thermal Layer ◽  
Thermal Radiation Effect

The motion of water conveying copper and aluminum nanoparticles on a heated moving sheet when thermal radiation and stretching/shrinking surface is significant and is investigated in this study to announce the increasing effects of volume fractions, thermal radiation, and moving parameters on this transport phenomenon. Furthermore, the flow of a Cu − Al 2 O 3 /water hybrid nanofluid across a heated moving sheet has been studied in both cross and streamwise directions. Thermal radiation effect is also considered, as this effect along with cross flow has not yet been investigated for the hybrid nanofluid in the published literature. Two distinct types of nanoparticles, namely, Al 2 O 3 (alumina) and Cu (copper), have been used to prepare hybrid nanofluid where water is considered as a base fluid. The system of nonlinear partial differential equations (PDEs) has been transferred to ordinary differential equations (ODEs) by compatible transformations before solving them by employing the III-stage Lobatto-IIIa method in bvp4c solver in MATLAB 2017 software. Temporal stability analysis has been carried out in order to verify stable branch between two branches by obtaining the smallest eigenvalue values. The branches obtained are addressed in depth against every applied parameter using figures and tables. The results show that there are three ranges of branches, no solution exists when λ > λ c , dual branches exist when 0.23 ≤ λ ≤ λ c , and a single solution exists when λ > 0.23 . Moreover, thermal layer thickness declines initially and then enhances in the upper and lower solutions for the higher values of the thermal radiation parameter.

Thermal radiation effect on the flow field and heat transfer of Co3O4-diamond/EG hybrid nanofluid using experimental data: A numerical study

2019 ◽  
Vol 134 (1) ◽  
Author(s):  
Ali Akbar Abbasian Arani ◽  
Farhad Monfaredi ◽  
Alireza Aghaei ◽  
Masoud Afrand ◽  
Ali J. Chamkha ◽  
...  
Keyword(s):  
Heat Transfer ◽  
Experimental Data ◽  
Flow Field ◽  
Thermal Radiation ◽  
Radiation Effect ◽  
Numerical Study ◽  
Hybrid Nanofluid ◽  
Thermal Radiation Effect

Mixed convection flow of a hybrid nanofluid past a vertical wedge with thermal radiation effect

2021 ◽  
Vol ahead-of-print (ahead-of-print) ◽  
Author(s):  
Natalia C. Roșca ◽  
Alin V. Roșca ◽  
Ioan Pop
Keyword(s):  
Differential Equations ◽  
Mixed Convection ◽  
Thermal Radiation ◽  
Radiation Effect ◽  
Convection Flow ◽  
Hybrid Nanofluid ◽  
Mixed Convection Flow ◽  
Content Type ◽  
Thermal Radiation Effect ◽  
Vertical Wedge

Purpose The purpose of this paper is to numerically study the problem of mixed convection flow of a hybrid nanofluid past a vertical wedge with thermal radiation effect. Design/methodology/approach The governing nonlinear partial differential equations are transformed into a system of ordinary differential equations by a similarity transformation, which is then solved numerically through the function bvp4c from MATLAB for different values of the governing parameters. The solutions contain a mixed convection parameter λ that has a considerable impact on the flow fields. Findings It is found that the solutions of the ordinary (similarity) differential equations have two branches, upper and lower branch solutions, in a certain range of the mixed convection and several other parameters. To establish which of these solutions are stable and which are not, a stability analysis has been performed. The effects of the governing parameters on the fluid flow and heat transfer characteristics are illustrated in tables and figures. It is found that dual (upper and lower branch) solutions exist for both the cases of assisting and opposing flow situations. A stability analysis has also been conducted to determine the physical meaning and stability of the dual solutions. Practical implications This theoretical study is significantly relevant to the applications of the heat exchangers placed in a low-velocity environment and electronic devices cooled by fans. Originality/value The case of mixed convection flow of a hybrid nanofluid past a vertical wedge with thermal radiation effects has not been studied before, and hence all generated numerical results are claimed to be original and novel.

Thermal radiation effect on non-Darcy natural convection with lateral mass transfer

2001 ◽  
Vol 37 (2-3) ◽  
pp. 161-165 ◽  
Author(s):  
M. A. El-Hakiem ◽  
M. F. El-Amin
Keyword(s):  
Mass Transfer ◽  
Natural Convection ◽  
Thermal Radiation ◽  
Radiation Effect ◽  
Lateral Mass ◽  
Thermal Radiation Effect

Thermal radiation effect on thermal explosion in gas containing fuel droplets

1999 ◽  
Vol 3 (4) ◽  
pp. 769-787 ◽  
Author(s):  
Igor Goldfarb ◽  
Vladimir Gol'dshtein ◽  
Grigory Kuzmenko ◽  
Sergei Sazhin
Keyword(s):  
Thermal Radiation ◽  
Thermal Explosion ◽  
Radiation Effect ◽  
Fuel Droplets ◽  
Thermal Radiation Effect

Numerical Simulation of Heat Transfer Characteristics for Two Metallic TPS Structures

2010 ◽  
Vol 156-157 ◽  
pp. 1568-1573
Author(s):  
Hai Yong Liu ◽  
Hong Fu Qiang
Keyword(s):  
Heat Transfer ◽  
Thermal Radiation ◽  
Heat Conductivity ◽  
Radiation Effect ◽  
Thermal Protection ◽  
Heating Temperature ◽  
Three Dimensional ◽  
Metallic Layer ◽  
Internal Cooling ◽  
Thermal Radiation Effect

Two structures of metallic thermal protection system(TPS) for hypersonic vehicle were presented. One model was a multi-layer construction and the other has cavities in the metallic layer. Numerical simulations were conducted on the three-dimensional TPS models using CFD software of Gambit and Fluent. Two heating temperatures of 1073K and 773K with constant temperature and isothermal boundary conditions were considered. Heat transfer was treated as single conductivity and thermal radiation effect was not involved. The results of simulation investigation showed that: The metallic layer had poor capability to restrict the heat conductivity. Heat was easier to transfer across the bracket into the internal part of the TPS. The ability of cavities in metallic layer to resist heat conductivity was limited. The temperature-heating time variation pattern was similar for different external heating temperature. Internal cooling was important for the TPS. The thermal radiation effect on the TPS would be focused in further research.

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