Experimental determination of turbulent forced convection heat transfer and friction factor with SiO2 nanofluid

Azmi, W.H.; Sharma, K.V.; Sarma, P. K.; Mamat, Rizalman; Anuar, Shahrani; Rao, V. Dharma

doi:10.1016/j.expthermflusci.2013.07.006

Cited by 215 publications

(109 citation statements)

References 21 publications

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“…Azmi et al [20,21] undertook experiments to determine turbulent heat transfer coefficients for flow of SiO 2 and TiO 2 nanofluids in a tube at a mean bulk temperature of 30 8C. They observed the friction factor to increase with concentration for Re < 15 000, and heat transfer coefficients to decrease for SiO 2 and TiO 2 at 30 mL/L (3.0 vol %) and 10 mL/L (1.0 vol %), respectively.…”

Section: Experiments With Nanofluidsmentioning

confidence: 95%

“…[7,22,42,49] Equation (4) for viscosity is in satisfactory agreement with the experimental data of various investigators. [7,12,13,20,22,49] Nanofluid Friction Factor Experiments are conducted in the turbulent Reynolds number range [8,15,[18][19][20][21] for a wide range of operating conditions with water-based nanofluids. The experimental friction factor is determined by employing the Darcy friction factor:…”

Section: Nanofluid Propertiesmentioning

confidence: 99%

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Theoretical analysis of heat transfer and friction factor for turbulent flow of nanofluids through pipes

et al. 2016

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A numerical model for determining the turbulent characteristics of fluid flow and heat transfer is presented, treating certain constants in the van Driest eddy diffusivity equation of momentum and heat as variables. The viscosity and thermal conductivity of nanofluids are estimated using regression equations. It was observed that the turbulent characteristics of nanofluids are different from those of water. The numerical results indicate a higher velocity of SiO 2 nanofluid and lower eddy diffusivity compared to Cu under similar operating conditions. The nanofluid temperature gradient increases with concentration and decreases with temperature. However, the temperature gradient is significantly influenced by the particle density. Equations for estimating the coefficient and the Prandtl index in the eddy diffusivity equations of momentum and heat, respectively, are developed as a function of Reynolds number, concentration, and nanofluid properties. The Prandtl index value decreases with increasing concentration, reflecting the reduction in heat transfer coefficients observed at lower operating temperatures.

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Section: Experiments With Nanofluidsmentioning

confidence: 95%

Section: Nanofluid Propertiesmentioning

confidence: 99%

Theoretical analysis of heat transfer and friction factor for turbulent flow of nanofluids through pipes

et al. 2016

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“…The detailed step of preparation was shown by Azmi et al [13]. The volume concentrations between 0.2 to 1.0%of nanolubricant was prepared in this experiment.…”

Section: Preparation Of Nanolubricantmentioning

confidence: 99%

Preparation and stability of silicone dioxide dispersed in polyalkylene glycol based nanolubricants

et al. 2016

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Abstract. Nanolubricant is one of the efforts introduced by researchers to increase efficiency in many mechanical application, especially in refrigeration. Two-step method is the most common method used in the process of adding nanoparticles dispersed in base lubricant because of the simplicity of the process to prepare a stable solution. In this work, the SiO 2 /PAG nanolubricants were prepared using two-steps method without the use of surfactant. The stability of SiO 2 /PAG nanolubricant was observed trough sedimentation photograph capturing technique and UVVis spectrophotometric test. The results shown that there are minimum sedimentation observed over one month. This result also confirmed via the UV-Vis test; the nanolubricant relative concentration was maintained at over 70 % compared to the initial concentration.

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“…After the complete study they found for same pumping power heat removal of MCHSs gives better performance PFHSs at medium and high pumping power and PFHSs gives slightly better performance then MCHSs for small pumping power. [16] they are determined experimentally the heat transfer coefficient and friction factor using of SiO 2 nanofluid flow in a circular tube under constant heat flux boundary condition in the turbulent region and take partical volumetric concentration up to 4%, reynold number in the range 5000-27000 at a bulk temperature 30 0 Cand they determined the pressure drop increase with partical concentration up to 3% and decrease thereafter and SiO 2 nanofluid friction factor decrease with increase in reynold at any concentration. Baharanchi (2013) [17] he reviewed on potential applications of Nanofluid technology in heat transfer enhancement.…”

Section: K Hamid Rezaseyf and Mortezafeizbakhshi (2012)mentioning

confidence: 99%

Improvement of Thermal Hydraulic Characteristics of MPFHS with Nanofluids –A Review

Lilhare¹

2017

IJRASET

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Absract: Today's several new techniques have to be compelled to be explored for the developments of recent electronic devices for dissipating high heat flux for ensure stable and optimum operation. Like micro-channel heat sinks because of their tiny mass and volume still as larger space for cooling of high heat flux chips with using pin fins with different shapes and different arrangements. So as to more optimize the small heat sink performance, the various kinds of nano-fluids are used as a cooling agent. The most aim of this work is to review numerous researches tired past to boost heat transfer rate and hydraulic behaviour of small pin fins heat sink by either changing its geometry, climate condition and material, spacing between the fins and its configuration with differing kinds of nano-fluids, additionally with completely different size and concentration of nano particle . Keywords-heat transfer, fins, nano fluid, computational fluid dynamic. I.INTRODUCTION Fins are used as associate extended surface to extend the heat transfer rate in a very big selection of engineering applications, and provide a sensible approach while not use of an excessive quantity of primary area for achieving a large heat transfer area. It's normally used for heat management in electrical appliances, cooling of combustion engine, like fins in an exceedingly automobile radiator. Therefore its vital issue to analysis the behavior of the fin in relation to temperature distribution for optimize the effectiveness. currently the present approach for enhance the heat transfer rate Nano-fluid is employed as a medium, containing nanoparticles (1-100 nm) of metal or metal compound that are uniformly and stably distributed in a base fluid for increase the thermal conductivity of base fluid. So that heat transfer from fin arrays has been studied extensively, both analytically and through an experiment.

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Experimental determination of turbulent forced convection heat transfer and friction factor with SiO2 nanofluid

Cited by 215 publications

References 21 publications

Theoretical analysis of heat transfer and friction factor for turbulent flow of nanofluids through pipes

Theoretical analysis of heat transfer and friction factor for turbulent flow of nanofluids through pipes

Preparation and stability of silicone dioxide dispersed in polyalkylene glycol based nanolubricants

Improvement of Thermal Hydraulic Characteristics of MPFHS with Nanofluids –A Review

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