Numerical study of laminar mixed convection of a nanofluid in horizontal curved tubes

Akbarinia, A.; Behzadmehr, A.

doi:10.1016/j.applthermaleng.2006.10.034

Cited by 243 publications

(83 citation statements)

References 29 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Many recent studies have shown that the low particle volumetric concentration of the nanoparticles in the base fluid makes it behave like a single-phase fluid [15,22]. Lee and Mudawar [23] suggested that nanoparticles should not be used in two-phase CHE.…”

Section: Thermophysical Properties Of Nanofluids and Nanofluidsmentioning

confidence: 99%

Numerical Study of Fluid Dynamic and Heat Transfer in a Compact Heat Exchanger Using Nanofluids

Gunnasegaran

Shuaib

Jalal

et al. 2012

ISRN Mechanical Engineering

View full text Add to dashboard Cite

Compact heat exchangers (CHEs) are characterized by a high surface area per unit volume, which can result in a higher efficiency than conventional heat exchangers. They are widely used in various applications in thermal fluid systems including automotive thermal fluid systems such as radiators for engine cooling systems. Recent development of nanotechnology brings out a new heat transfer coolant called "nanofluids," which exhibit larger thermal properties than conventional coolants due to the presence of suspended nanosized composite particles in a base fluid. In this study, a numerical investigation using different types of nanoparticles in ethylene glycol-base fluid namely copper (Cu), diamond (DM), and silicon dioxide (SiO 2 ) on automobile flat tube plate-fin cross-flow CHE is explored. The nanoparticles volume fraction of 2% is considered for all types of nanofluids examined in this study. The three-dimensional (3D) governing equations for both liquid flow and heat transfer are solved using a standard finite volume method (FVM) for the range of Reynolds number between 4000 and 7000. The standard κ-ε turbulence model with wall function is employed. The computational model is used to study the variations of shear stress, skin friction, and convective heat transfer coefficient. All parameters are found to yield higher magnitudes in the developing and developed regions along the flat tubes with the nanofluid flow than base fluid. The pressure drop is slightly larger for nanofluids but insignificant at outlet region of the tube. Hence, the usage of nanofluids in CHEs transfers more energy in a cost-effective manner than using conventional coolants.

show abstract

Section: Thermophysical Properties Of Nanofluids and Nanofluidsmentioning

confidence: 99%

Numerical Study of Fluid Dynamic and Heat Transfer in a Compact Heat Exchanger Using Nanofluids

Gunnasegaran

Shuaib

Jalal

et al. 2012

ISRN Mechanical Engineering

View full text Add to dashboard Cite

show abstract

“…The heat transfer coefficient was found to increase with an increase in the Reynolds s number and volume fractions, and at the same time the pressure drop along the pipe depended on the nanoparticle size suspended in the base fluid 14 . The alumina-water nanofluids flowing in a horizontal and an inclined tube was studied 15 , where by the maximum heat transfer enhancement of the nanofluid obtained was 15 . Researchers Balla et al studied the enhancement of heat transfer for different metallic oxide nanoparticles.…”

mentioning

confidence: 99%

Numerical Study of the Enhancement of Heat Transfer for Hybrid CuO-Cu Nanofluids Flowing in a Circular Pipe

et al. 2013

View full text Add to dashboard Cite

“…The effects of nanoparticle concentrations, nanoparticle diameter, nanoparticle materials and Reynolds number in various flows in rectangular duct and circular pipe in two/three dimensions are described by various authors by simulation. In this regard some literatures are: Akbarinia and Behzadmehr (2007;Heris et al, 2007;Namburu et al, 2009;Fard et al, 2010;Lai and Yang, 2011;Demir et al, 2011;Sasmito et al, 2011;Sarkar et al, 2012;Tahir and Mital, 2012;Akhtari et al, 2013;Sheikholeslami et al, 2013;Celen et al, 2014;Azmi et al, 2014;Zhao et al, 2014;Om and Mohammed, 2014;Beheshti et al, 2015). They studied the effects of nanofluids type, nanoparticle volume fraction of nanofluids and the effect of aspect ratio on the thermal fields.…”

Section: Introductionmentioning

confidence: 99%

Behaviour of Rheology of Nanofluid During Convection in Pipe

Yadav

Majumder

2016

American Journal of Nanotechnology

View full text Add to dashboard Cite

Abstract:In this article, the simulation of nanofluid flow in pipe and the behavior of different variables on nanofluid flow are presented. Al 2 O 3 -water of volume fraction of Al 2 O 3 2 to 8% was considered as nanofluid for simulation. For the simulation the single phase approach is used to calculate viscosity, temperature difference on wall, Reynolds number, thermal conductivity and temperature throughout the pipe. The MATLAB code is employed to solve the flow in pipe using finite difference method. Finally a conclusion is made based on simulation, how the temperature of the nanofluid flow changed with the radial direction and its axial direction is reported. How thermal conductivity, temperature difference on wall, Reynolds number and the viscosity of the nanofluid changed with the length of the pipe is explained based on the present simulation. Also effects of volume fraction of nanoparticle, radius of pipe, outside temperature of wall, Reynolds number and turbulent flow on the heat flow through pipe.

show abstract

Numerical study of laminar mixed convection of a nanofluid in horizontal curved tubes

Cited by 243 publications

References 29 publications

Numerical Study of Fluid Dynamic and Heat Transfer in a Compact Heat Exchanger Using Nanofluids

Numerical Study of Fluid Dynamic and Heat Transfer in a Compact Heat Exchanger Using Nanofluids

Numerical Study of the Enhancement of Heat Transfer for Hybrid CuO-Cu Nanofluids Flowing in a Circular Pipe

Behaviour of Rheology of Nanofluid During Convection in Pipe

Contact Info

Product

Resources

About