Journal
NUMERICAL HEAT TRANSFER PART A-APPLICATIONS
Volume -, Issue -, Pages -Publisher
TAYLOR & FRANCIS INC
DOI: 10.1080/10407782.2023.2243380
Keywords
CVFEM; electric field; nanofluid; natural convection; thermal radiation
Categories
Ask authors/readers for more resources
This study numerically investigates the heat transfer of electro-hydrodynamic natural convection in an enclosure with a wavy hot wall using Al2O3-water nanofluid as the working fluid. The effects of operational parameters on the stream function and the average Nusselt number are studied, and two new parameters are defined to evaluate the contribution of the electrical field and radiation effects on the fluid flow. The results show that Nuave increases by 7.95% when f increases from 0 to 0.05 at Ra=10^5; |?(max)| and Nuave increase by 27.6% and 37.2%, respectively, when ? goes up from 0 to 0.5 at R-d=1.0; |?(max)| and Nuave decrease by 48.7% and 27.1%, respectively, with decreasing the amplitude parameter (a(n)) from 0.1 to 0.3 at Ra=10^5.
One of the most crucial topics in the thermal sciences is the analysis of how an external electric field affects the natural convection flow. In this study, the heat transfer of electro-hydrodynamic natural convection in an enclosure with a wavy hot wall is numerically studied. Al2O3-water nanofluid is considered as the working fluid, and furthermore, the effect of thermal radiation on the characteristics of fluid flow is simulated. Non-dimensional forms of governing equations are numerically solved using control volume finite element method. The effects of operational parameters such as Rayleigh number, nanoparticles volume-fraction, Lorentz force number, Eckert number, charge diffusivity number, and electric field number on the maximum absolute value of stream function and the average Nusselt number are investigated. Two new parameters are defined to evaluate the contribution of the electrical field and radiation effects on the fluid flow. The results show that Nuave ascends 7.95% when f increases from 0 to 0.05 at Ra=10(5). Also, the values of |?(max)| and Nuave increase 27.6% and 37.2%, respectively, when ? goes up from 0 to 0.5 at R-d=1.0. The values of |?(max)| and Nuave decrease 48.7% and 27.1%, respectively, with decreasing the amplitude parameter (a(n)) from 0.1 to 0.3 at Ra=10(5).
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available