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A review of experimental investigations on thermal phenomena in nanofluids.

Thomas S, Balakrishna Panicker Sobhan C - Nanoscale Res Lett (2011)

Bottom Line: Nanoparticle suspensions (nanofluids) have been recommended as a promising option for various engineering applications, due to the observed enhancement of thermophysical properties and improvement in the effectiveness of thermal phenomena.A number of investigations have been reported in the recent past, in order to quantify the thermo-fluidic behavior of nanofluids.This review is focused on examining and comparing the measurements of convective heat transfer and phase change in nanofluids, with an emphasis on the experimental techniques employed to measure the effective thermal conductivity, as well as to characterize the thermal performance of systems involving nanofluids.

View Article: PubMed Central - HTML - PubMed

Affiliation: School of Nano Science and Technology, NIT Calicut, Kerala, India. csobhan@nitc.ac.in.

ABSTRACT
Nanoparticle suspensions (nanofluids) have been recommended as a promising option for various engineering applications, due to the observed enhancement of thermophysical properties and improvement in the effectiveness of thermal phenomena. A number of investigations have been reported in the recent past, in order to quantify the thermo-fluidic behavior of nanofluids. This review is focused on examining and comparing the measurements of convective heat transfer and phase change in nanofluids, with an emphasis on the experimental techniques employed to measure the effective thermal conductivity, as well as to characterize the thermal performance of systems involving nanofluids.

No MeSH data available.


Related in: MedlinePlus

Short hot wire probe apparatus of Xie et al. [9].
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Figure 1: Short hot wire probe apparatus of Xie et al. [9].

Mentions: The experimental apparatus consists of a SHW probe and a teflon cell of 30 cm3 volume. The dimensions of the SHW probe are shown in Figure 1. The SHW probe is mounted on the teflon cap of the cell. A short platinum wire of length 14.5 mm and 20 μm diameter is welded at both ends to platinum lead wires of 1.5 mm in diameter. The platinum probe is coated with a thin layer (1 μm) of alumina for insulation, thus preventing electrical leakage. Before and after the application of the Al2O3 film coating, the effective length and radius of the hot wire and the thickness of the Al2O3 insulation film are calibrated. Figure 1b shows the dimensions of the Teflon cell used for measurements in nanofluids. Two thermocouples located at the same height, at the upper and lower welding spots of the hot wire and lead wires, respectively, monitor the temperature homogeneity. The temperature fluctuations are minimized by placing the hot wire cell in a thermostatic bath at the measurement temperature.


A review of experimental investigations on thermal phenomena in nanofluids.

Thomas S, Balakrishna Panicker Sobhan C - Nanoscale Res Lett (2011)

Short hot wire probe apparatus of Xie et al. [9].
© Copyright Policy - open-access
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC3211470&req=5

Figure 1: Short hot wire probe apparatus of Xie et al. [9].
Mentions: The experimental apparatus consists of a SHW probe and a teflon cell of 30 cm3 volume. The dimensions of the SHW probe are shown in Figure 1. The SHW probe is mounted on the teflon cap of the cell. A short platinum wire of length 14.5 mm and 20 μm diameter is welded at both ends to platinum lead wires of 1.5 mm in diameter. The platinum probe is coated with a thin layer (1 μm) of alumina for insulation, thus preventing electrical leakage. Before and after the application of the Al2O3 film coating, the effective length and radius of the hot wire and the thickness of the Al2O3 insulation film are calibrated. Figure 1b shows the dimensions of the Teflon cell used for measurements in nanofluids. Two thermocouples located at the same height, at the upper and lower welding spots of the hot wire and lead wires, respectively, monitor the temperature homogeneity. The temperature fluctuations are minimized by placing the hot wire cell in a thermostatic bath at the measurement temperature.

Bottom Line: Nanoparticle suspensions (nanofluids) have been recommended as a promising option for various engineering applications, due to the observed enhancement of thermophysical properties and improvement in the effectiveness of thermal phenomena.A number of investigations have been reported in the recent past, in order to quantify the thermo-fluidic behavior of nanofluids.This review is focused on examining and comparing the measurements of convective heat transfer and phase change in nanofluids, with an emphasis on the experimental techniques employed to measure the effective thermal conductivity, as well as to characterize the thermal performance of systems involving nanofluids.

View Article: PubMed Central - HTML - PubMed

Affiliation: School of Nano Science and Technology, NIT Calicut, Kerala, India. csobhan@nitc.ac.in.

ABSTRACT
Nanoparticle suspensions (nanofluids) have been recommended as a promising option for various engineering applications, due to the observed enhancement of thermophysical properties and improvement in the effectiveness of thermal phenomena. A number of investigations have been reported in the recent past, in order to quantify the thermo-fluidic behavior of nanofluids. This review is focused on examining and comparing the measurements of convective heat transfer and phase change in nanofluids, with an emphasis on the experimental techniques employed to measure the effective thermal conductivity, as well as to characterize the thermal performance of systems involving nanofluids.

No MeSH data available.


Related in: MedlinePlus