Results 231 to 240 of about 8,142,189 (281)

Heat conduction in solids: Temperature-dependent thermal conductivity

International Journal of Heat and Mass Transfer, 1968
Abstract A variational formulation is derived and applied to problems in heat conduction through solids. This formulation has, as its Euler-Lagrange equation, the general heat equation where the thermal conductivity, density, and specific heat may be temperature-dependent.
Hays, D. F., Curd, H. N.
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Morphology and Temperature Dependence of the Thermal Conductivity of Nanoporous SiGe

Nano Letters, 2011
Using molecular dynamics simulations, we show that the thermal conductivity (κ) of Si(0.5)Ge(0.5) can be reduced by more than one order of magnitude by etching nanometer-sized holes in the material, and it becomes almost constant as a function of temperature between 300 and 1100 K for samples with 1 nm wide pores. In nanoporous SiGe, thermal conduction
He, Y., Donadio, D., Galli, G.
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Temperature Dependence of the Thermal Conductivity of Thin Silicon Nanowires

Nano Letters, 2010
We compute the lattice thermal conductivity (kappa) of silicon nanowires as a function of temperature by molecular dynamics simulations. In wires with amorphous surfaces kappa may reach values close to that of amorphous silicon and is nearly constant between 200 and 600 K; this behavior is determined by the presence of a majority of nonpropagating ...
Davide, Donadio, Giulia, Galli
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Temperature-dependence of the thermal conductivity of polymers

Journal of Engineering Physics, 1973
A method is proposed for the generalization of test data pertaining to the thermal conductivity of polymers.
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Temperature-dependent thermal conductivity of porous silicon

Journal of Physics D: Applied Physics, 1997
The thermal conductivity of electrochemically etched porous silicon (PS) layers was determined over a wide temperature range (T = 35 - 320 K) using the dynamic technique. Both the doping level of the silicon wafers (p and ) and the porosity P of the porous layers (P = 64 - 89%) were varied.
G Gesele, J Linsmeier, V Drach, J Fricke, R Arens-Fischer   +4 more
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Thermal conductivity of liquids and its temperature dependence

Journal of Physics D: Applied Physics, 1970
The temperature dependence of thermal conductivity of liquids as given by Horrocks and McLaughlin is re-examined and useful relations to estimate thermal conductivity are presented. In the case of the 12 homologous series considered the maximum deviation is about 5%.
Viswanath, DS, Bhagwant, Rao M
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Heat conduction with a temperature-dependent thermal conductivity coefficient

Journal of engineering physics, 1970
A variational method is employed to solve stationary and nonstationary heat conduction problems when the thermal conductivity coefficient is temperature-dependent and the heat generation function of the medium is arbitrary.
openaire   +1 more source

Temperature Dependence of Thermal Conductivity for Silicon Dioxide

ASME 2008 First International Conference on Micro/Nanoscale Heat Transfer, Parts A and B, 2008
Heat transport of dielectric thin films in 30–300 nm thick is characterized in the temperature range of 74–300 K using the 3ω method, which is a simple method to measure the cross-plane thermal conductivity of dielectric thin films. Dielectric film samples of two kinds, deposited on Si substrates using plasma enhanced chemical vapor deposition (PECVD ...
Da-Jeng Yao, Wei-Chih Lai, Heng-Chieh Chien   +2 more
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Temperature Dependence of Thermal Conductivity Enhancement for Nanofluids

Journal of Heat Transfer, 2003
Usual heat transfer fluids with suspended ultra fine particles of nanometer size are named as nanofluids, which have opened a new dimension in heat transfer processes. The recent investigations confirm the potential of nanofluids in enhancing heat transfer required for present age technology.
Sarit Kumar Das, Nandy Putra, Peter Thiesen, Wilfried Roetzel   +3 more
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Modulating temperature dependence of thermal conductivity by nanostructuring

Japanese Journal of Applied Physics, 2018
Abstract At around room temperature and higher, thermal conductivity of single crystal commonly decreases as temperature increases and shows negative temperature dependence. Crystals with positive temperature dependence, which is often preferred in thermal management, requires high Debye temperature.
Takuma Shiga, Junichiro Shiomi
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