Enhancing thermal conductivity of fluids with nano-particles
01 Jan 1995-Vol. 231, pp 99-105
About: The article was published on 1995-01-01 and is currently open access. It has received 7263 citations till now. The article focuses on the topics: Thermal conductivity & Nanoparticle.
Citations
More filters
TL;DR: In this article, the MHD stagnation point flow of a viscoelastic nanofluid towards a stretching surface with nonlinear radiative effects is studied by employing convective condition at the stretching surface.
291 citations
TL;DR: In this article, a three-dimensional flow of couple stress nanofluid in the presence of thermophoresis and Brownian motion effects is analyzed and the energy equation subject to nonlinear thermal radiation is taken into account.
289 citations
TL;DR: In this paper, a brief review on theoretical models is presented precisely, and the effects of nanoparticles' shape and size, temperature, volume concentration, pH, etc. are organized together and reviewed.
Abstract: Since the past decade, rapid development in nanotechnology has produced several aspects for the scientists and technologists to look into. Nanofluid is one of the incredible outcomes of such advancement. Nanofluids (colloidal suspensions of metallic and nonmetallic nanoparticles in conventional base fluids) are best known for their remarkable change to enhanced heat transfer abilities. Earlier research work has already acutely focused on thermal conductivity of nanofluids. However, viscosity is another important property that needs the same attention due to its very crucial impact on heat transfer. Therefore, viscosity of nanofluids should be thoroughly investigated before use for practical heat transfer applications. In this contribution, a brief review on theoretical models is presented precisely. Furthermore, the effects of nanoparticles’ shape and size, temperature, volume concentration, pH, etc. are organized together and reviewed.
288 citations
Cites background or methods from "Enhancing thermal conductivity of f..."
...[1] of Argonne Laboratory proposed heat transfer fluids which are the colloidal suspension of nanoparticles (Al, Cu, Al2O3, CuO, SiC, CNT, etc....
[...]
...In 2007, Avsec and Oblac [16] derived a viscosity model with the help of the proposed formula of Ward model [14] and Einstein model [1]....
[...]
TL;DR: In this paper, a numerical method based on the control volume approach was used to solve the system of nonlinear and coupled governing equations of a turbulent flow of nanofluids, which are composed of saturated water and Al2O3 nanoparticles at various concentrations, flowing inside a tube submitted to uniform wall heat flux boundary condition.
Abstract: Purpose – To study the hydrodynamic and thermal behaviors of a turbulent flow of nanofluids, which are composed of saturated water and Al2O3 nanoparticles at various concentrations, flowing inside a tube submitted to a uniform wall heat flux boundary condition.Design/methodology/approach – A numerical method based on the “control‐volume” approach was used to solve the system of non‐linear and coupled governing equations. The classical κ‐e model was employed in order to model the turbulence, together with staggered non‐uniform grid system. The computer model, satisfactorily validated, was used to perform an extended parametric study covering wide ranges of the governing parameters. Information regarding the hydrodynamic and thermal behaviors of nanofluid flow are presented.Findings – Numerical results show that the inclusion of nanoparticles into the base fluid has produced an augmentation of the heat transfer coefficient, which has been found to increase appreciably with an increase of particles volume co...
285 citations
TL;DR: In this article, the authors present the results of a numerical study on natural convection heat transfer in an inclined enclosure filled with a water-CuO nanofluid, where two opposite walls of the enclosure are insulated and the other two walls are kept at different temperatures.
Abstract: This article presents the results of a numerical study on natural convection heat transfer in an inclined enclosure filled with a water-CuO nanofluid. Two opposite walls of the enclosure are insulated and the other two walls are kept at different temperatures. The transport equations for a Newtonian fluid are solved numerically with a finite volume approach using the SIMPLE algorithm. The influence of pertinent parameters such as Rayleigh number, inclination angle, and solid volume fraction on the heat transfer characteristics of natural convection is studied. The results indicate that adding nanoparticles into pure water improves its heat transfer performance; however, there is an optimum solid volume fraction which maximises the heat transfer rate. The results also show that the inclination angle has a significant impact on the flow and temperature fields and the heat transfer performance at high Rayleigh numbers. In fact, the heat transfer rate is maximised at a specific inclination angle depending on ...
282 citations