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About 10,000 papers for “Thermal diffusivity”

THERMAL DIFFUSIVITY

T. W. Davies · A-to-Z Guide to Thermodynamics Heat and Mass Transfer and Fluids Engineering · 2011

Cited by 0

thermal diffusivity

2024

Citation: 'thermal diffusivity' in the IUPAC Compendium of Chemical Terminology, 5th ed.; International Union of Pure and Applied Chemistry; 2025. Online version 5.0.0, 2025. 10.1351/goldbook.08697 • License: The IUPAC Gold Book is licensed under Creative Commons Attribution-ShareAlike CC BY-SA 4.0 International for individual terms. Requests for commercial usage of the compendium should be directed to IUPAC.

Cited by 0

Thermal Diffusivity

Masahide Terazima, Noboru Hirota, Silvia E. Braslavsky et al. · IUPAC Standards Online · 2016

This paper presents quantities, terminology, and symbols of terms related to photothermal phenomena and used in photothermal and related spectroscopies. The terms used in the literature to describe photothermal phenomena and methods are reviewed, and a glossary of terms is given. The origins of photothermal phenomena, as well as the relations among various photothermal effects, are summarized. The listed terms cover the terminology in transient grating, transient lens, photoacoustic spectroscopy, photothermal radiometry, calorimetry, interferometry, deflection, reflection, and other related spectroscopies, which use or are related to photothermal effects.

Cited by 0

Thermal diffusivity imaging

Tim Gfroerer, Ryan Phillips, Peter Rossi · American Journal of Physics · 2015

The tip of a rod is heated with a torch and brought into contact with the center of a metal sheet. A thermal camera is then used to image the temperature profile of the surface as a function of time. The infrared camera is capable of recording radiometric data with 1 mK resolution in nearly 105 pixels, so thermal diffusion can be monitored with unprecedented precision. With a frame rate of approximately 10 Hz, the pace of the data acquisition minimizes the loss of accuracy due to inevitable cooling mechanisms. We report diffusivity constants equal to 1.23 ± 0.06 cm2/s in copper and 0.70 ± 0.05 cm2/s in aluminum. The behavior is modeled with a straightforward but oddly under-utilized one-dimensional finite difference method.

Cited by 18

Thermal diffusivity of

D. M. Todorović, Dana Vasiljević-Radović, A. I. Bojičić et al. · Proceedings of the 10th international conference on photoacoustic and photothermal phenomena · 1999

The thermophysical properties of BaTiO3-based ferroelectric ceramics were investigated using the photoacoustic frequency transmission method. The photoacoustic amplitude signals as a function of modulating frequency, for various sample thicknesses, were measured and fitted with theoretically calculated spectra. Obtained data show the presence of thermal wave diffraction within the sample. The change of the thermal diffusivity vs the modulating frequency is also discussed.

Cited by 4

5.4 Soil Thermal Diffusivity

Robert Horton · Soil Science Society of America book series · 2002

Soil thermal diffusivity is the parameter that describes the rate of transmission of temperature change within the soil. This chapter describes a laboratory method and a field method for determining the thermal diffusivity from transient soil temperature. In order to determine the thermal diffusivity from temperature observations it uses appropriate solutions to the transient conduction heat transfer equation. Steady conduction heat transfer is described by the Fourier equation. The laboratory method of determining the thermal diffusivity requires temperature measurements at known depths and times as heat is being removed from or added to the surface of a soil column. The method requires uniform initial soil column temperature and a step function surface temperature change at the beginning of the experiment (time equal to zero). The real thermal diffusivity involves conduction heat transfer alone, while the apparent thermal diffusivity includes convection heat transfer in addition to conduction heat transfer.

Cited by 5

Thermal Conductivity and Diffusivity

Ray D. Jackson, Sterling A. Taylor · Soil Science Society of America book series · 1986

Steady-state methods are sufficiently accurate for measuring the diffusivity and conductivity of dry soils. Methods using transient heat flow are generally considered to be most useful for soils work. The advantages of transient methods are that water movement in response to temperature gradients is minimized, and a long wait for thermal gradients to become constant is not required. The transient-state cylindrical-probe method at present offers one of the better means of measuring the thermal conductivity of soil in situ. The probe can be placed horizontally or vertically at various depths in the soil, and the method can be adapted for laboratory use. The possible contact resistance and the effect of the conductivity and heat capacity of the probe material were treated theoretically by De Vries and Peck. They concluded that in many cases the simple theory is sufficient.

Cited by 52