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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Journal ArticleDOI
The effect of rib shape on the behavior of laminar flow of oil/MWCNT nanofluid in a rectangular microchannel
Mohammad Reza Gholami,Omid Ali Akbari,Ali Marzban,Davood Toghraie,Gholamreza Ahmadi Sheikh Shabani,Majid Zarringhalam +5 more
TL;DR: In this paper, the effect of using rectangular, oval, parabolic, triangular and trapezoidal rib shapes on behavior and heat transfer of nanofluid flow in a rectangular microchannel has been numerically investigated.
Journal ArticleDOI
Mixed convection of Water-Aluminum oxide nanofluid in an inclined lid-driven cavity containing a hot elliptical centric cylinder
TL;DR: In this paper, the mixed convection in a lid-driven cavity containing a hot elliptical centric cylinder was studied by using of Water-Aluminum oxide (Al2O3) nanofluid.
Journal ArticleDOI
Nanoparticle shape effects on thermal-hydraulic performance of boehmite alumina nanofluids in a sinusoidal–wavy mini-channel with phase shift and variable wavelength
TL;DR: In this paper, the authors studied the thermal-hydraulic performance of a sinusoidal-wavy wall mini-channel with wall phase shift and variable wavelength, and found that the shape of nanoparticles can greatly influence the performance of the mini channel.
Journal ArticleDOI
The effect of using water/CuO nanofluid and L-shaped porous ribs on the performance evaluation criterion of microchannels
TL;DR: In this paper, the effect of porous media properties on the performance evaluation criterion (PEC) of the fluid was numerically investigated in a microchannel with L-shaped porous ribs and the results indicated that with the existence of porous ribs, the nanofluid does not have significant effect on heat transfer increase.
Journal ArticleDOI
Effects of magnetic field on micro cross jet injection of dispersed nanoparticles in a microchannel
Seyed Amin Bagherzadeh,Esmaeil Jalali,Mohammad Mohsen Sarafraz,Omid Ali Akbari,Arash Karimipour,Marjan Goodarzi,Quang-Vu Bach +6 more
TL;DR: In this article, a rectangular microchannel was used to enhance the heat transfer under a homogeneous magnetic field with the strengths of Ha'= 0, 20 and 40, and both slip velocity and no-slip boundary conditions were used.
References
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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.
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Two-equation eddy-viscosity turbulence models for engineering applications
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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.
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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.