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Thermal contact conductance

About: Thermal contact conductance is a(n) research topic. Over the lifetime, 5613 publication(s) have been published within this topic receiving 134106 citation(s).
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Journal ArticleDOI
Abstract: This paper discusses the influence of surface energy on the contact between elastic solids. Equations are derived for its effect upon the contact size and the force of adhesion between two lightly loaded spherical solid surfaces. The theory is supported by experiments carried out on the contact of rubber and gelatine spheres.

6,441 citations


Journal ArticleDOI
Abstract: A flash method of measuring the thermal diffusivity, heat capacity, and thermal conductivity is described for the first time. A high‐intensity short‐duration light pulse is absorbed in the front surface of a thermally insulated specimen a few millimeters thick coated with camphor black, and the resulting temperature history of the rear surface is measured by a thermocouple and recorded with an oscilloscope and camera. The thermal diffusivity is determined by the shape of the temperature versus time curve at the rear surface, the heat capacity by the maximum temperature indicated by the thermocouple, and the thermal conductivity by the product of the heat capacity, thermal diffusivity, and the density. These three thermal properties are determined for copper, silver, iron, nickel, aluminum, tin, zinc, and some alloys at 22°C and 135°C and compared with previously reported values.

3,213 citations


Journal ArticleDOI
Philip Kim1, Li Shi1, Arun Majumdar1, Paul L. McEuen1  +1 moreInstitutions (2)
TL;DR: The thermal conductivity and thermoelectric power of a single carbon nanotube were measured using a microfabricated suspended device and shows linear temperature dependence with a value of 80 microV/K at room temperature.
Abstract: The thermal conductivity and thermoelectric power of a single carbon nanotube were measured using a microfabricated suspended device. The observed thermal conductivity is more than 3000 W/K m at room temperature, which is 2 orders of magnitude higher than the estimation from previous experiments that used macroscopic mat samples. The temperature dependence of the thermal conductivity of nanotubes exhibits a peak at 320 K due to the onset of umklapp phonon scattering. The measured thermoelectric power shows linear temperature dependence with a value of 80 microV/K at room temperature.

2,960 citations



Journal ArticleDOI
Abstract: We have produced nanotube-in-oil suspensions and measured their effective thermal conductivity. The measured thermal conductivity is anomalously greater than theoretical predictions and is nonlinear with nanotube loadings. The anomalous phenomena show the fundamental limits of conventional heat conduction models for solid/liquid suspensions. We have suggested physical concepts for understanding the anomalous thermal behavior of nanotube suspensions. In comparison with other nanostructured materials dispersed in fluids, the nanotubes provide the highest thermal conductivity enhancement, opening the door to a wide range of nanotube applications.

2,301 citations


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Performance
Metrics
No. of papers in the topic in previous years
YearPapers
20225
2021103
2020114
2019121
2018103
2017202

Top Attributes

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Topic's top 5 most impactful authors

Leroy S. Fletcher

69 papers, 1.3K citations

M. Michael Yovanovich

56 papers, 2.6K citations

Majid Bahrami

26 papers, 984 citations

Xing Zhang

17 papers, 697 citations

James Barber

15 papers, 557 citations