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
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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
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Heat transfer efficiency of Al2O3-MWCNT/thermal oil hybrid nanofluid as a cooling fluid in thermal and energy management applications: An experimental and theoretical investigation
Amin Asadi,Meisam Asadi,Alireza Rezaniakolaei,Lasse Rosendahl,Masoud Afrand,Somchai Wongwises +5 more
TL;DR: In this paper, the authors evaluated the heat transfer efficiency of Al2O3-MWCNT/thermal oil hybrid nanofluid over different temperatures (25-50°C) and solid concentrations (0.125% −1.5%).
Journal ArticleDOI
Investigation of turbulent heat transfer and nanofluid flow in a double pipe heat exchanger
Mohammad Hussein Bahmani,Ghanbar Ali Sheikhzadeh,Majid Zarringhalam,Omid Ali Akbari,Abdullah A.A.A. Al-Rashed,Gholamreza Ahmadi Sheikh Shabani,Marjan Goodarzi +6 more
TL;DR: In this paper, the effects of nanoparticles volume fraction, flow direction and Reynolds number on base fluid, nanofluid and wall temperatures, thermal efficiency, Nusselt number and convection heat transfer coefficient have been studied.
Journal ArticleDOI
Heat transfer improvement of water/single-wall carbon nanotubes (SWCNT) nanofluid in a novel design of a truncated double-layered microchannel heat sink
Ali Akbar Abbasian Arani,Omid Ali Akbari,Mohammad Reza Safaei,Ali Marzban,Abdullah A.A.A. Al-Rashed,Gholamreza Ahmadi,Truong Khang Nguyen +6 more
TL;DR: In this article, double layered micro-channel heat sink (MCHS) was used to transfer heat from nanofluid water/single-wall carbon nanotubes.
Journal ArticleDOI
A new correlation for predicting the thermal conductivity of ZnO–Ag (50%–50%)/water hybrid nanofluid: An experimental study
TL;DR: In this paper, the effect of volume fraction (0.125-2%) and temperature (25-50°C) on thermal conductivity of a hybrid nanofluid was examined.
Journal ArticleDOI
Developing a new correlation to estimate the thermal conductivity of MWCNT-CuO/water hybrid nanofluid via an experimental investigation
TL;DR: In this paper, the enhancement of thermal conductivities of water in the presence of copper oxide and multiwalled carbon nanotubes is investigated for the first time, and the results show that the thermal conductivity of the nanofluid increases at more solid concentration.
References
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Journal ArticleDOI
Simulation of copper-water nanofluid in a microchannel in slip flow regime using the lattice Boltzmann method
Arash Karimipour,Alireza Hossein Nezhad,Annunziata D’Orazio,Mohammad Hemmat Esfe,Mohammad Reza Safaei,Ebrahim Shirani +5 more
TL;DR: In this article, the effects of wall slip velocity and temperature jump of the nanofluid were studied for the first time by using lattice Boltzmann method, and the results indicated that LBM can be used to simulate forced convection for the nano-fluid micro flows.
Journal ArticleDOI
Investigation of Heat Transfer Enhancement in a Forward-Facing Contracting Channel Using FMWCNT Nanofluids
TL;DR: In this article, the turbulent forced convection heat transfer of water/functionalized multi-walled carbon nanotube (FMWCNT) nanofluids over a forward-facing step was studied.
Journal ArticleDOI
Investigation of rib's height effect on heat transfer and flow parameters of laminar water-Al2O3 nanofluid in a rib-microchannel
Omid Ali Akbari,Davood Toghraie,Arash Karimipour,Mohammad Reza Safaei,Marjan Goodarzi,Habibollah Alipour,Mahidzal Dahari +6 more
TL;DR: The results indicate that the normal internal ribs or turbulators, can significantly enhance the convective heat transfer within a microchannel and illustrate that by increasing the rib's heights and volume fraction of nanoparticles, friction coefficient, heat transfer rate and average Nusselt number of the ribbed-microchannels tend to augment.
Journal ArticleDOI
Numerical study of developing laminar forced convection of a nanofluid in an annulus
TL;DR: In this article, the axial evolution of temperature, convective heat transfer coefficient and the friction coefficient at the inner and outer walls' region are shown and discussed, and it is shown that the dimensionless axial velocity profile does not significantly change with the nanoparticle volume fraction.
Journal ArticleDOI
Investigation of heat transfer and pressure drop of a counter flow corrugated plate heat exchanger using MWCNT based nanofluids
Marjan Goodarzi,Ahmad Amiri,Mohammad Shahab Goodarzi,Mohammad Reza Safaei,Arash Karimipour,Ehsan Mohseni Languri,Mahidzal Dahari +6 more
TL;DR: In this article, the influence of functional covalent groups on the thermophysical properties of carbon nanotube base fluid was investigated experimentally, and it was found that increasing Reynolds number, Peclet number or fraction of nanomaterial would improve the heat transfer characteristics of the nanofluid.