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Hussein A.M.,Universiti Malaysia Pahang | Hussein A.M.,Al Haweeja Institute | Sharma K.V.,JNTUH College of Engineering | Bakar R.A.,Universiti Malaysia Pahang | Kadirgama K.,Universiti Malaysia Pahang
Renewable and Sustainable Energy Reviews | Year: 2014

The low thermal properties of liquids have led to investigations into additives of small size (less than 100 nm solid particles) to enhance their heat transfer properties and hydrodynamic flow. To summarise the experimental and numerical studies, this paper reviews these computational simulations and finds that most of them are in agreement with the results of experimental work. Many of the studies report enhancements in the heat transfer coefficient with an increase in the concentration of solid particles. Certain studies with a smaller particle size indicated an increase in the heat transfer enhancement when compared to values obtained with a larger size. Additionally, the effect of the shape of the flow area on the heat transfer enhancement has been explored by a number of studies. All of the studies showed a nominal increase in pressure drop. The significant applications in the engineering field explain why so many investigators have studied heat transfer with augmentation by a nanofluid in the heat exchanger. This article presents a review of the heat transfer applications of nanofluids to develop directions for future work. The high volume fraction of various nanofluids will be useful in car radiators to enhance the heat transfer numerically and experimentally. Correlation equations can expose relationships between the Nusselt number, the Reynolds number, the concentration and the diameter of the nanoparticles. On the other hand, more work is needed to compare the shapes (e.g., circular, elliptical and flat tube) that might enhance the heat transfer with a minimal pressure drop. © 2013 Elsevier Ltd. All rights reserved. Source


Hussein A.M.,Universiti Malaysia Pahang | Hussein A.M.,Al Haweeja Institute | Sharma K.V.,JNTUH College of Engineering | Bakar R.A.,Universiti Malaysia Pahang | Kadirgama K.,Universiti Malaysia Pahang
International Communications in Heat and Mass Transfer | Year: 2013

The effects of the tube specifications on the heat transfer in car radiator are significant to improve cooling system performance. Friction factor and heat transfer enhancement of three types of nanofluids flow through horizontal three shapes of tubes has been evaluated numerically. CFD model by using FLUENT software depending on finite volume method was conducted. TiO2 nanoparticles with volume fractions (1%, 1.5%, 2% and 2.5%) are suspended in water as a base fluid to be nanofluids is used in this study. On the other hand, three types of tubes (circular, elliptical and flat tube) are chosen with 3mm hydraulic diameter and 500mm length. Numerical results show that the increase in volume fraction of nanofluid due to increase in fluid flow characteristics and heat transfer enhancement as compared with base fluid. The results of CFD model are compared with experimental data available in literature, and there is a good agreement with deviation 2%. © 2013 Elsevier Ltd. Source


Hussein A.M.,Universiti Malaysia Pahang | Hussein A.M.,Al Haweeja Institute | Bakar R.A.,Universiti Malaysia Pahang | Kadirgama K.,Universiti Malaysia Pahang | Sharma K.V.,JNTUH College of Engineering
International Communications in Heat and Mass Transfer | Year: 2014

The increasing demand of nanofluids in industrial applications has led to increased attention from many researchers. In this paper, heat transfer enhancement using TiO2 and SiO2 nanopowders suspended in pure water is presented. The test setup includes a car radiator, and the effects on heat transfer enhancement under the operating conditions are analyzed under laminar flow conditions. The volume flow rate, inlet temperature and nanofluid volume concentration are in the range of 2-8 LPM, 60-80°C and 1-2% respectively. The results showed that the Nusselt number increased with volume flow rate and slightly increased with inlet temperature and nanofluid volume concentration. The regression equation for input (volume flow rate, inlet temperature and nanofluid volume concentration) and response (Nusselt number) was found. The results of the analysis indicated that significant input parameters to enhance heat transfer with car radiator. These experimental results were found to be in good agreement with other researchers' data, with a deviation of only approximately 4%. © 2014 Elsevier Ltd. Source


Hussein A.M.,Universiti Malaysia Pahang | Hussein A.M.,Al Haweeja Institute | Bakar R.A.,Universiti Malaysia Pahang | Kadirgama K.,Universiti Malaysia Pahang | Sharma K.V.,JNTUH College of Engineering
Heat and Mass Transfer/Waerme- und Stoffuebertragung | Year: 2014

The car radiator heat transfer enhancement by using TiO2and SiO2nanoparticles dispersed in water as a base fluid was studied experimentally. The test rig is setup as a car radiator with tubes and container. The range of Reynolds number and volume fraction are (250–1,750) and (1.0–2.5 %) respectively. Results showed that the heat transfer increases with increasing of nanofluid volume fraction. The experimental data is agreed with other investigator. © 2014, Springer-Verlag Berlin Heidelberg. Source


Hussein A.M.,Universiti Malaysia Pahang | Hussein A.M.,Al Haweeja Institute | Bakar R.A.,Universiti Malaysia Pahang | Kadirgama K.,Universiti Malaysia Pahang | Sharma K.V.,JNTUH College of Engineering
International Journal of Automotive and Mechanical Engineering | Year: 2013

Solid particles dispersed in a liquid with sizes no larger than 100nm, known as nanofluids, are used to enhance Thermophysical properties compared to the base fluid. Preparations of alumina (Al2O3), titania (TiO2) and silica (SiO2) in water have been experimentally conducted in volume concentrations ranging between 1 and 2.5%. Thermal conductivity is measured by the hot wire method and viscosity with viscometer equipment. The results of thermal conductivity and viscosity showed an enhancement (0.5-20% and 0.5-60% respectively) compared with the base fluid. The data measured agreed with experimental data of other researchers with deviation of less than 5%. The study showed that alumina has the highest thermal conductivity, followed silica and titania, on the other hand silica has the highest viscosity followed alumina and titania. © Universiti Malaysia Pahang. Source

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