Investigating the diameter of solid particles effects on a laminar nanofluid flow in a curved tube using a two phase approach

Akbarinia, A.; Laur, R.

doi:10.1016/j.ijheatfluidflow.2009.03.002

Cited by 146 publications

(38 citation statements)

References 28 publications

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“…They showed the higher accuracy of mixture model with respect to the single phase model and the agreement with experimental correlation proposed by Xuan and Li [10]. Mirmasoumi and Behazadmehr [23] and Akbarinia and Laur [24] numerically studied nanofluids laminar convection. The former analyzed laminar mixed convection in a horizontal tube, while the latter studied the effect of particles diameter on the laminar flow in a curved circular tube.…”

Section: Introductionsupporting

confidence: 69%

Numerical investigation on nanofluids turbulent convection heat transfer inside a circular tube

Bianco¹,

Manca²,

Nardini³

2011

International Journal of Thermal Sciences

216

107

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Section: Introductionsupporting

confidence: 69%

Numerical investigation on nanofluids turbulent convection heat transfer inside a circular tube

Bianco¹,

Manca²,

Nardini³

2011

International Journal of Thermal Sciences

216

107

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“…A single-phase numerical study carried out by Akbarinia and Behzadmehr [7] shows that increasing the concentration of the particles increases the heat transfer rate and pressure drop for laminar mixed convection flow of nano-fluid in the horizontal curved pipe. Akbarinia and Laur [8] using a 2-phase approach numerically investigated the effect of the particle diameter on the flow and heat transfer. They stated that increasing the diameter of nano-particles decreases the Nu number, and for nanoscale particles increasing the particle diameter does not change the flow pattern.…”

Section: Introductionmentioning

confidence: 99%

Experimental and numerical investigations of turbulent forced convection flow of nano-fluid in helical coiled tubes at constant surface temperature

et al. 2015

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“…This may be attributed to reduction of nanoparticles sedimentation rate and cross-sectional mixing enhancement, due to the secondary flow. It should be noted that the nanoparticles volume fraction does not have a direct effect on the secondary flow, also the cross-sectional distribution of solid nanoparticles is uniform because of the small size of the nanoparticles [44][45][46][47]. Figure 8 depicts the variation of relative average total heat transfer coefficient versus Womersly number for different flow rates of the base fluid (deionized water).…”

Section: Heat Transfer In Steady Flow Of Nanofluidmentioning

confidence: 99%

Characteristics of heat transfer and flow of Al2O3/water nanofluid in a spiral-coil tube for turbulent pulsating flow

et al. 2015

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K Thermal conductivity (W/m K) L Length of tube (m) m Mass flow rate (kg/s) N Revolution per minute of the rotating valve spindle (rpm) Pe Peclet number Pr Prandtl number Q Heat transfer rate (W) r Inner radius of tube (m) R Radius of spiral coil (m) Re Reynolds number T Temperature (K) U Average overall heat transfer coefficient (W/m 2 K) V Average velocity of mean flow (m/s) Wo Womersly number, Wo = D i 2 υ ω Greek letters α Thermal diffusivity (m 2 /s) µ Dynamic viscosity (kg/m s) ρ Density (kg/m 3 ) υ Kinematic viscosity (m 2 /s) ω Angular pulsation frequency (1/s) ∞ Ambient medium ϕ Nanoparticle volumetric fraction Superscript -Average Subscripts ave Average i Inlet m Mean o Outlet pu Pulsated st SteadyAbstract In the past two decades, enhancement of heat transfer characteristics of original fluid using nanofluids has been proposed by a large number of researchers. In this paper, an experimental study was carried out to investigate effect of pulsation on heat transfer of fluid flow inside a spiral-coil tube. In order to perform the experiments, a hot water reservoir tank was prepared and the spiral-coil was immersed horizontally inside the tank. Average temperature of the hot water bath was kept constant at 60 °C to establish a quiescent region of uniform temperature. The experiments were conducted in turbulent flow regime using distilled water and Al 2 O 3 /water nanofluid at 0.5, 1, and 1.5 % particle volume concentration. Results showed that overall heat transfer coefficient of the base fluid flow increases by using nanofluid or pulsation into the base fluid flow up to 14 %. Heat transfer results also indicated that combination of the nanofluid and the pulsation into the fluid flow can increase significantly the overall heat transfer coefficient up to 23 %. List of symbolsA Inside heat transfer area (m 2 ) C p Specific heat capacity (J/kg K) D i Inner diameter of tube (m) f Frequency (Hz)

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Investigating the diameter of solid particles effects on a laminar nanofluid flow in a curved tube using a two phase approach

Cited by 146 publications

References 28 publications

Numerical investigation on nanofluids turbulent convection heat transfer inside a circular tube

Numerical investigation on nanofluids turbulent convection heat transfer inside a circular tube

Experimental and numerical investigations of turbulent forced convection flow of nano-fluid in helical coiled tubes at constant surface temperature

Characteristics of heat transfer and flow of Al2O3/water nanofluid in a spiral-coil tube for turbulent pulsating flow

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