Journal ArticleDOI
Influence of T-semi attached rib on turbulent flow and heat transfer parameters of a silver-water nanofluid with different volume fractions in a three-dimensional trapezoidal microchannel
Habibollah Alipour,Arash Karimipour,Mohammad Reza Safaei,Davood Toghraie Semiromi,Omid Ali Akbari +4 more
Reads0
Chats0
TLDR
In this paper, the influence of T-semi attached rib on the turbulent flow and heat transfer parameters of a silver-water nanofluid with different volume fractions in a three-dimensional trapezoidal microchannel was explored.Abstract:
This study aimed at exploring influence of T-semi attached rib on the turbulent flow and heat transfer parameters of a silver-water nanofluid with different volume fractions in a three-dimensional trapezoidal microchannel. For this purpose, convection heat transfer of the silver-water nanofluid in a ribbed microchannel was numerically studied under a constant heat flux on upper and lower walls as well as isolated side walls. Calculations were done for a range of Reynolds numbers between 10,000 and 16,000, and in four different sorts of serrations with proportion of rib width to hole of serration width (R/W). The results of this research are presented as the coefficient of friction, Nusselt number, heat transfer coefficient and thermal efficiency, four different R/W microchannels. The results of numerical modeling showed that the fluid's convection heat transfer coefficient is increased as the Reynolds number and volume fraction of solid nanoparticle are increased. For R/W=0.5, it was also maximum for all the volume fractions of nanoparticle and different Reynolds numbers in comparison to other similar R/W situations. That's while friction coefficient, pressure drop and pumping power is maximum for serration with R/W=0 compared to other serration ratios which lead to decreased fluid-heat transfer performance.read more
Citations
More filters
Journal ArticleDOI
Numerical investigation of thermal performance augmentation of nanofluid flow in microchannel heat sinks by using of novel nozzle structure: sinusoidal cavities and rectangular ribs
Erfan Khodabandeh,Omid Ali Akbari,Davood Toghraie,Mohsen Saffari Pour,Mohsen Saffari Pour,Pär Jönsson,Mikael Ersson +6 more
TL;DR: In this paper, the authors present a numerical simulation of a laminar, steady and Newtonian flow of f-graphene nanoplatelet/water nanofluid in a new microchannel design with factors for increasing heat transfer such as presence of ribs, curves to enable satisfactory fluid mixing and changing fluid course at the inlet and exit sections.
Journal ArticleDOI
Numerical simulation of pressure drop for three-dimensional rectangular microchannels
TL;DR: In this paper, the authors numerically investigate the flow characteristics and extend the data of friction factor and Reynolds number product of hydrodynamically developing laminar flow in three-dimensional rectangular microchannels with different aspect ratios.
Proceedings ArticleDOI
Experimental Investigation of Thermal Performance of Nano-Enhanced Phase Change Materials for Thermal Management of Electronic Components
TL;DR: In this paper, Al2O3 nanoparticles are dispersed as thermal conductivity enhancer (TCE) in different weight fractions (φ) for improved performance in phase change material (PCM).
Journal ArticleDOI
Numerical simulation of the effect of using nanofluid in phase change process of cooling fluid
Farzad Pourfattah,Saeid Yousefi,Omid Ali Akbari,Mahsa Adhampour,Davood Toghraie,Maboud Hekmatifar +5 more
TL;DR: In this paper, the effect of adding volume fraction of CuO nanoparticles on the boiling process has been investigated and the results indicate that using nanofluid is very effective in postponement of boiling process.
Journal ArticleDOI
Transition simulation of two-phase intermittent slug flow characteristics in oil and gas pipelines
TL;DR: In this paper, a transition simulation of two-phase intermittent slug flow characteristics in oil and gas pipelines using CFD analysis was performed using two-fluid free pressure model and Riemann algorithm has been used to discretize the governing equations.
References
More filters
Book
Numerical heat transfer and fluid flow
TL;DR: In this article, the authors focus on heat and mass transfer, fluid flow, chemical reaction, and other related processes that occur in engineering equipment, the natural environment, and living organisms.
Journal ArticleDOI
Two-equation eddy-viscosity turbulence models for engineering applications
TL;DR: In this paper, two new two-equation eddy-viscosity turbulence models are presented, which combine different elements of existing models that are considered superior to their alternatives.
Journal ArticleDOI
Hydrodynamic and heat transfer study of dispersed fluids with submicron metallic oxide particles
Bock Choon Pak,Young I. Cho +1 more
TL;DR: In this article, the authors used a Brookfield rotating viscometer to measure the viscosities of the dispersed fluids with γ-alumina (Al2O3) and titanium dioxide (TiO2) particles at a 10% volume concentration.
Journal ArticleDOI
Alteration of thermal conductivity and viscosity of liquid by dispersing ultra-fine particles. dispersion of al2o3, sio2 and tio2 ultra-fine particles
TL;DR: In this paper, the authors proposed a new algorithm called Al2O3, which is based on the SiO2-2-SiO3 algorithm, and showed that it is more efficient than SiO3 and TiO2.