Numerical Study of the Effect of the Nanofluids Type and The Size of the Heating Sections on Heat Transfer for Cooling Electronic Components

Abstract

The present work consists of analysing heat exchange by natural convection. The intensification of these exchanges and the improvement of efficiency have become a major issue in the industrial world today. This paper is part of this framework, and is particularly concerned with problems related to the intensification of heat exchanges in electronic components. Our objective is to understand the effect of the nanofluid on the mechanism of natural laminar convection in a three-dimensional cavity. In this context, we have developed our own computational code and conducted a parametric study looking at thermomechanical and geometrical parameters. The fluid flow and heat transfer in the cavity are studied for different sets of the governing parameters, namely the Rayleigh number Ra = 10 3 ,10 4 ,10 5 and 10 6 , volume fraction Ф varying between Ф = 0% and 10% and nanofluid type. The obtained results show a positive effect of the volume fraction and the Rayleigh number on the heat transfer improvement. It should also be noted that the increase of the heating section size and Ra results in increased amount of heat removed by the same nanofluid. Similarly, increasing the volume fraction causes the intensification of the flow and an increase of the heat exchange.

The natural convection inside a 3D triangular cross section cavity filled with nanofluid and included cylinder with different arrangements

“…On the other hand, the validation of this study was approved by satisfying the results of the previous studies and getting a very close results with them as presented in Table 5. Also, the results for the stream lines and the isotherm lines configurations were validated with that performed by Sannad et al [31] at (Ra = 10 4 and φ = 0.04) as presented in Fig. 4.…”

“…The cavity filled with (Cu, Al2O3, Ag, TiO2) water based nanofluids. Sannad et al [31][32] uses two different heat sources inside the cavity. The first was the partially heated left side wall [31] while the second was by using a hot partition [32].…”

“…Sannad et al [31][32] uses two different heat sources inside the cavity. The first was the partially heated left side wall [31] while the second was by using a hot partition [32]. In order to understand the effect of the (Al2O3, Cu and TiO2) water based nanofluids.…”

Three-Dimensional Analysis of the Thermal Behavior of Alumina-Water Nanofluid Inside Hexagonal and Octagonal Enclosed Domain

“…It is heated by three parallel and identical elements for different inclinations. As like as others, Sannad et al, [52] cavity is designed also to understand the effect of the same water based nanofluids but for only three type of nanoparticles (Al2O3, Cu and TiO2) nanoparticles. Then examine other heating manner of cavity using a hot partition of uniform temperature instead of partially manner [53].…”

Stability Solution of Unsteady Stagnation-Point Flow and Heat Transfer over a Stretching/Shrinking Sheet in Nanofluid with Slip Velocity Effect

“…The Tiwari-Das model was applied by Devi and Andrews [24], Bachok et al, [5], Srinivasacharya et al, [25], Malvandi et al, [26], Jafar et al, [27], and Ferdows et al, [28]. More interesting studies in nanofluid can be found in the previous researches [29][30][31][32][33][34][35][36][37].…”