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research-article

Free convection in an open triangular cavity filled with a nanofluid under the effects of Brownian diffusion, thermophoresis and local heater

[+] Author and Article Information
Nadezhda S. Bondareva

Laboratory on Convective Heat and Mass Transfer, Tomsk State University, 634050, Tomsk, Russia
r0dniki@mail.ru

Mikhail A. Sheremet

Laboratory on Convective Heat and Mass Transfer, Tomsk State University, 634050, Tomsk, RussiaDepartment of Nuclear and Thermal Power Plants, Tomsk Polytechnic University, 634050, Tomsk, Russia
michael-sher@ya.ru

Hakan F. Oztop

Department of Mechanical Engineering, Technology Faculty, Fırat University, Elazig, TurkeyDepartment of Mechanical Engineering, King Abdulaziz University, Jeddah, Saudi Arabia
hfoztop1@gmail.com

Nidal Abu-Hamdeh

Department of Mechanical Engineering, King Abdulaziz University, Jeddah, Saudi Arabia
nidal@just.edu.jo

1Corresponding author.

ASME doi:10.1115/1.4038192 History: Received September 30, 2016; Revised August 18, 2017

Abstract

Natural convection of a water-based nanofluid in a partially open triangular cavity with a local heat source of constant temperature under the effect of Brownian diffusion and thermophoresis has been analyzed numerically. Governing equations formulated in dimensionless stream function and vorticity variables on the basis of two-phase nanofluid model with corresponding initial and boundary conditions have been solved by finite difference method. Detailed study of the effect of Rayleigh number, buoyancy-ratio parameter and local heater location on fluid flow and heat transfer has been carried out. It has been revealed that an increase in buoyancy-ratio parameter leads to the heat transfer enhancement.

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