Design & Construction of An Experimental Setup for Measuring Thermal Conductivity of Versatile Range of Solid Materials

2021 ◽  
Author(s):  
Aljunaid Azme ◽  
Saqibul Islam ◽  
Ali Kawser Masum ◽  
Mohammad Mobarak Hossain Majumder ◽  
Tariq Mahbub
Keyword(s):  
Thermal Conductivity ◽  
Experimental Setup ◽  
Solid Materials ◽  
Design Construction

Evaluation of the Temperature Oscillation Technique to Calculate Thermal Conductivity of Water and Systematic Measurement of the Thermal Conductivity of Aluminum Oxide – Water Nanofluid

2004 ◽  
Author(s):  
P. Bhattacharya ◽  
S. Nara ◽  
P. Vijayan ◽  
T. Tang ◽  
W. Lai ◽  
...  
Keyword(s):  
Thermal Conductivity ◽  
Aluminum Oxide ◽  
Effective Thermal Conductivity ◽  
Base Fluid ◽  
Suspended Solid ◽  
Temperature Oscillation ◽  
Solid Particles ◽  
Systematic Measurement ◽  
Experimental Setup ◽  
Suspended Solid Particles

A nanofluid is a fluid containing suspended solid particles, with sizes of the order of nanometers. The nanofluids are better conductors of heat than the base fluid itself. Therefore it is of interest to measure the effective thermal conductivity of such a nanofluid. We use temperature oscillation technique to measure the thermal conductivity of the nanofluid. However, first we evaluate the temperature oscillation technique as a tool to measure thermal conductivity of water. Then we validate our experimental setup by measuring the thermal conductivity of the aluminum oxide-water nanofluid and comparing our results with previously published work. Finally, we do a systematic series of measurements of the thermal conductivities of aluminum oxide-water nanofluids at various temperatures and explain the reasons behind the dependence of the enhancement in thermal conductivity of the nanofluid on temperature.

Static thermal conductivity methods for solid materials

Measurement ◽  
1983 ◽  
Vol 1 (4) ◽  
pp. 167-171
Author(s):  
Ir J-P. Issi ◽  
Ir B. Poulaert ◽  
Ir J. Heremans
Keyword(s):  
Thermal Conductivity ◽  
Solid Materials

Chemical-Vapor-Deposited Materials for High Thermal Conductivity Applications

MRS Bulletin ◽  
2001 ◽  
Vol 26 (6) ◽  
pp. 458-463 ◽  
Author(s):  
Jitendra S. Goela ◽  
Nathaniel E. Brese ◽  
Michael A. Pickering ◽  
John E. Graebner
Keyword(s):  
Thin Film ◽  
Thermal Conductivity ◽  
Chemical Vapor Deposition ◽  
Vapor Deposition ◽  
Chemical Vapor ◽  
High Thermal Conductivity ◽  
Solid Materials ◽  
Chemical Vapor Deposited

Chemical vapor deposition (CVD) is an attractive method for producing bulk and thin-film materials for a variety of applications. In this method, gaseous reagents condense onto a substrate and then react to produce solid materials. The materials produced by CVD are theoretically dense, highly pure, and have other superior properties.

An apparatus for measuring the thermal conductivity and diffusivity of solid materials

1972 ◽  
Vol 22 (6) ◽  
pp. 728-731
Author(s):  
V. Ya. Chekhovskoi ◽  
R. A. Belyaev ◽  
Yu. V. Vavilov
Keyword(s):  
Thermal Conductivity ◽  
Solid Materials

scholarly journals Titania Nanofluids Based on Natural Ester: Cooling and Insulation Properties Assessment

Nanomaterials ◽  
2020 ◽  
Vol 10 (4) ◽  
pp. 603 ◽  
Author(s):  
Cristian Olmo ◽  
Cristina Méndez ◽  
Félix Ortiz ◽  
Fernando Delgado ◽  
Alfredo Ortiz
Keyword(s):  
Thermal Conductivity ◽  
Breakdown Voltage ◽  
Base Fluid ◽  
Thermal Characterization ◽  
Experimental Setup ◽  
Buoyancy Forces ◽  
And Behavior ◽  
Natural Ester

The assessment of a TiO2 vegetal-based dielectric nanofluid has been carried out, and its characteristics and behavior have been tested and compared with a previously tested maghemite nanofluid. The results obtained reflect a similar affectation of the main properties, with a maximal improvement of the breakdown voltage of 33% at 0.5 kg/m3, keeping the thermal conductivity and the viscosity almost constant, especially the first one. This thermal characterization agrees with the results obtained when applying the TiO2 optimal nanofluid in the cooling of an experimental setup, with a slightly worse performance than the base fluid. Nevertheless, this performance is the opposite to that noticed with the ferrofluid, which was capable of improving the cooling of the transformer and decreasing its temperature. The similarities between the characterizations of both nanofluids, the differences in their cooling performances and their different magnetic natures seem to point out the presence of additional thermomagnetic buoyancy forces to support the improvement of the cooling.

PHOTOACOUSTIC MEASUREMENT AND MOLECULAR DYNAMICS SIMULATION FOR THERMAL CONDUCTIVITY OF Al0.3Ga0.7As

2003 ◽  
Vol 14 (01) ◽  
pp. 61-72 ◽  
Author(s):  
S. CHITRA ◽  
A. JALAL ◽  
K. RAMACHANDRAN ◽  
S. RAJAGOPAL
Keyword(s):  
Thermal Conductivity ◽  
Molecular Dynamics ◽  
Molecular Dynamics Simulation ◽  
Thermal Property ◽  
Dynamics Simulation ◽  
Experimental Setup ◽  
Photoacoustic Technique ◽  
Photoacoustic Measurement ◽  
First Time

The thermal conductivity of Al 0.3 Ga 0.7 As is studied using photoacoustic technique and molecular dynamics simulation. Tersoff's potential is used for the simulation, for the first time, to this alloy. Thermal conductivity, determined experimentally by photoacoustic technique using our experimental setup, agrees well with the molecular dynamics simulation and literature values. The results are compared with the host GaAs and the role of DX centers in thermal property is discussed.

Variation of the Expansion Coefficient of Nanofluids With Temperature: A Correction for Conductivity Data

2012 ◽  
Vol 3 (4) ◽  
Author(s):  
Efstathios E. Michaelides
Keyword(s):  
Thermal Conductivity ◽  
Thermal Expansion ◽  
Conductivity Data ◽  
Volumetric Fraction ◽  
Solid Materials ◽  
Strong Function ◽  
Temperature Changes ◽  
Thermal Expansion Coefficients ◽  
High Thermal Expansion ◽  
Expansion Coefficients

The two constituent phases of the nanofluids have thermal expansion coefficients that are significantly different. Moreover, the variability of the thermal expansion coefficients of fluids with temperature is significantly higher than that of solid materials. The mismatch of the thermal expansion coefficients creates changes of the volumetric fraction of solids with temperature changes. The changes can be significant with fluids that have high thermal expansion coefficients, such as refrigerants and fluids that operate close to their critical points. Since the thermal conductivity of nanofluids is a very strong function of the volumetric fraction of the nanoparticles, these changes of the volumetric fraction may cause significant effects on the thermal conductivity of the nanofluids, which must be accounted for in any design process.

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