نتایج جستجو برای: thermal analysis

تعداد نتایج: 2999304  

Journal: :The Journal of General Physiology 1962
Eric Ponder

A method for measuring K, the coefficient of thermal conductivity, for a variety of dog tissues is described. The values of K for muscle and liver are larger than that for water, the value of K for lung is smaller than that for water and the values of K for brain, plasma, and blood are about the same as that of water. The values found for K are given in a table.

2003
D. KOVAČEVIĆ

Samples of surimi were prepared in laboratory conditions from Adriatic pilchard (Sardina pilchardus). Water content in surimi was 81.5% before mixing with NaCl and κ-carrageenan, which were added in the range of mass fraction from 0 to 10%. Relative apparent specific enthalpy !, initial freezing point Ti, density ρ, and thermal conductivity k of surimi in the temperature range from -25 C to 10 ...

2016
Wei Lv Asegun Henry

Thermal conductivity is important for almost all applications involving heat transfer. The theory and modeling of crystalline materials is in some sense a solved problem, where one can now calculate their thermal conductivity from first principles using expressions based on the phonon gas model (PGM). However, modeling of amorphous materials still has many open questions, because the PGM itself...

2013
Hosain Darvishi Mohammad Zarein

The thermal conductivity of sunflower seed was determined as a function of moisture content, bulk density and temperature which varies from 0.1 to 30.48% (w.b.) and 437.14 to 352.5 kg/m and 22 to 46°C, 3 respectively. The slope of the linear portion ( T versus ln(t)) method was used to analyze the line source heating data for thermal conductivity determination. Bulk density of sunflower seeds f...

Journal: :Science and technology of advanced materials 2010
Chunlei Wan Yifeng Wang Ning Wang Wataru Norimatsu Michiko Kusunoki Kunihito Koumoto

Thermal conductivity is one of the key parameters in the figure of merit of thermoelectric materials. Over the past decade, most progress in thermoelectric materials has been made by reducing their thermal conductivity while preserving their electrical properties. The phonon scattering mechanisms involved in these strategies are reviewed here and divided into three groups, including (i) disorde...

2001
J. V. Sengers

This paper reviews the experimental information on the behavior of the viscosity and thermal conductivity of fluids near the critical point. Section 2 presents some general remarks on experimental complications associated with the measurement of these properties in the critical region. Experimental work on the viscosity of one component fluids near the liquid-vapor critical point is rev...

2009
Jonathan A. O’Donnell Vladimir E. Romanovsky Jennifer W. Harden David McGuire

Organic soil horizons function as important controls on the thermal state of near-surface soil and permafrost in high-latitude ecosystems. The thermal conductivity of organic horizons is typically lower than mineral soils and is closely linked to moisture content, bulk density, and water phase. In this study, we examined the relationship between thermal conductivity and soil moisture for differ...

2017
Yaron Amouyal

Modelling of the effects of materials' microstructure on thermal transport is an essential tool for materials design, and is particularly relevant for thermoelectric (TE) materials converting heat into electrical energy. Precipitates dispersed in a TE matrix act as phonon-scattering centers, thereby reducing thermal conductivity. We introduce a practical approach to tailor a definite precipitat...

2016
Gaohua Zhu Jun Liu Qiye Zheng Ruigang Zhang Dongyao Li Debasish Banerjee David G. Cahill

Thermal conductivity of two-dimensional (2D) materials is of interest for energy storage, nanoelectronics and optoelectronics. Here, we report that the thermal conductivity of molybdenum disulfide can be modified by electrochemical intercalation. We observe distinct behaviour for thin films with vertically aligned basal planes and natural bulk crystals with basal planes aligned parallel to the ...

2015
Hang Zhang Austin J. Minnich

Which sizes of nanoparticles embedded in a crystalline solid yield the lowest thermal conductivity? Nanoparticles have long been demonstrated to reduce the thermal conductivity of crystals by scattering phonons, but most previous works assumed the nanoparticles to have a single size. Here, we use optimization methods to show that the best nanoparticle size distribution to scatter the broad ther...

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