Results 251 to 260 of about 40,950 (298)

Diffusion of moisture through grain

Journal of Stored Products Research, 1971
Abstract Small parcels (120 g) of wet wheat were embedded in 550 g lots of dry wheat and observed to take 65 days at 22·5°C and more than 140 days at 5°C to reach equilibrium. A difference in moisture content of 0·5 per cent remained after 140 days at 22·5°C due to hysteresis.
S.W. Pixton, H.J. Griffiths
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In-Plane Diffusivity of Moisture in Paper

Drying Technology, 1997
ABSTRACT Any nonuniformity in local moisture content of paper which develops during drying because of locally nonuniform drying rates provides a driving force for in-plane diffusion of moisture, which in turn acts to reduce this moisture nonuniformity.
S.J. Hashemi, V.G. Comes, R.H. Crotogino, W.J.M. Douglas   +3 more
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Moisture Diffusivity of Unidirectional Composites

Journal of Composite Materials, 1982
The moisture diffusion in unidirectional fiber-reinforced composite materials is formulated in terms of relative moisture concentration which cor responds to the temperature for the heat conduction problem. And the effec tive transverse moisture diffusivity of the composite materials with random array packing of fibers is predicted based on the ...
Kyohei Kondo, Toshimi Taki
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Influence of moisture on the diffusion of ultrasound in concrete

Ultrasonics
This study aimed to investigate the effects of internal moisture migration and subsequent drying-shrinkage-induced micro-cracking in concrete on diffuse ultrasound, through a series of experiments that comprised multiple drying and rewetting cycles carried out over the long-term.
Eunjong, Ahn, Homin, Song, Myoungsu, Shin, John S, Popovics   +3 more
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Moisture diffusion in epoxy systems

Journal of Applied Polymer Science, 1999
The moisture diffusion process of an epoxy system is studied as a function of epoxy-amine stoichiometry and the resulting microstructure. Differences in diffusion behavior are related to the relative importance of diffusion through the low-density and high-density microstructural phases for different stoichiometries.
M. R. Vanlandingham, R. F. Eduljee, J. W. Gillespie   +2 more
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Diffusivity of Moisture in Thin Films

20th International Reliability Physics Symposium, 1982
Absorption of moisture by thin films produces a volume increase which changes the film stress toward compression. This effect is the basis of a new technique for measuring water diffusivity. The diffusion coefficient is determined by a least squares fit of the stress data to the diffusion equation, with appropriate boundary conditions.
Edward J. McInerney, Paul A. Flinn
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Determiination of moisture diffusivity in porous media using moisture concentration profiles

International Journal of Heat and Mass Transfer, 1996
A procedure is presented to determine the moisture diffusivity for drying from measured moisture concentration profiles. From error analysis it is shown that the applied space grid for scanning and the one-dimensional resolution of the NMR (nuclear magnetic resonance) method used for the measurements had a minor influence on the accuracy of the ...
Pel, L., Brocken, H.J.P., Kopinga, K.
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The Measurement of Soil Moisture Diffusivity

Soil Science Society of America Journal, 1956
Abstract The solution of the differential equation describing the flow of moisture in unsaturated porous media is difficult because of the dependence of the permeability on moisture content. In the case of horizontal flow this equation can be written in a form similar to the non‐linear diffusion equation.
R. R. Bruce, A. Klute
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Moisture Diffusivity in Forest Fuels

International Journal of Wildland Fire, 1992
Abstract. Apracticalmeans of quanmingthe diffusivities of forest fuels from fielddata is presented. The mathematics of this method is explored for four fuel shapes: a litter layer, a hardwood leaf, a twig and a square fuel moisture analogue stick, which are represented geometrically by a semi-infinite solid, a slab, a cylinder and a square prism ...
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Description of moisture dependence of diffusion coefficient by moisture diffusion equation considering Coulomb friction

Holz als Roh- und Werkstoff, 1998
The diffusion model based on Fick's second law has been used to predict the moisture movement in nonsteady state. However, the diffusion coefficient generally is not a constant. The diffusion equation origins from well-known heat transfer theory. In the case of moisture movement, moisture below fiber saturation point should be considered to have some ...
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