Natural Convection and Entropy Generation in a Square Cavity with Variable Temperature Side Walls Filled with a Nanofluid: Buongiorno’s Mathematical Model

Entropy

卷:19

Teodor Grosan¹  Ioan Pop¹  Mikhail A. Sheremet² 

[1] Department of Mathematics, Babeş-Bolyai University, Cluj-Napoca 400084, Romania;

[2] Department of Theoretical Mechanics, Tomsk State University, Tomsk 634050, Russia;

关键词: natural convection;    square cavity;    sinusoidal wall temperature;    nanofluids;    Brownian diffusion;    thermophoresis;    numerical method;   

DOI  :  10.3390/e19070337

来源: DOAJ

【 摘 要 】

Natural convection heat transfer combined with entropy generation in a square cavity filled with a nanofluid under the effect of variable temperature distribution along left vertical wall has been studied numerically. Governing equations formulated in dimensionless non-primitive variables with corresponding boundary conditions taking into account the Brownian diffusion and thermophoresis effects have been solved by finite difference method. Distribution of streamlines, isotherms, local entropy generation as well as Nusselt number has been obtained for different values of key parameters. It has been found that a growth of the amplitude of the temperature distribution along the left wall and an increase of the wave number lead to an increase in the average entropy generation. While an increase in abovementioned parameters for low Rayleigh number illustrates a decrease in average Bejan number.

【 授权许可】

Unknown