Results 251 to 260 of about 40,425 (288)

Moisture diffusivity of wood

AIP Conference Proceedings, 2015
Moisture transport in four different types of wood is investigated. The specimens are subjected to one-sided water penetration in vertical direction and the moisture profiles are determined by the capacitance method. The calibration is done a posteriori using the last measured moisture profile by the gravimetric method. The moisture diffusivity is then
Miloš Jerman, Robert Černý
openaire   +1 more source

On Moisture Diffusion Modeling Using Thermal-Moisture Analogy

Journal of Electronic Packaging, 2007
Thermal-moisture analogy schemes for a moisture diffusion analysis are reviewed. Two schemes for practical applications are described using the governing equations of heat and mass diffusions: (1) direct analogy and (2) normalized analogy. The schemes are implemented to define valid domains of application.
Samson Yoon, Bongtae Han, Zhaoyang Wang
openaire   +1 more source

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
openaire   +1 more source

Simulating moisture diffusion in polymers using thermal-moisture analogy

2016 17th International Conference on Thermal, Mechanical and Multi-Physics Simulation and Experiments in Microelectronics and Microsystems (EuroSimE), 2016
The present paper illustrates moisture diffusion using advanced thermal-moisture analogy approach. Experimental procedure to measure the diffusivity and solubility of epoxy based encapsulation material to be implemented in simulation has been discussed. The moisture weight gain of the sample is measured till its saturated state over time at 5 different
Arun Sasi, Przemyslaw Gromala
openaire   +1 more source

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
openaire   +1 more source

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
openaire   +1 more source

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.
openaire   +1 more source

Moisture diffusion through bulk grain

Journal of Stored Products Research, 1981
Abstract Pixton and Griffiths (1971) describe the diffusion of moisture through bulk grain by means of a diffusion coefficient which is an empirically determined function of grain moisture content and temperature. This paper presents a general analysis of the diffusion mechanism based on the interstitial partial pressure of water vapour derived ...
openaire   +1 more source

Determination of moisture-dependent moisture diffusivity using smoothed experimental data

AIP Conference Proceedings, 2013
Application of large sets of experimental data containing measurement errors in computational analyses without any preprocessing can lead to distortion of results. Therefore, transformation of these data from point-wise given values to smooth curves is one of the key factors allowing their proper utilization.
Václav Kočí, Jan Kočí, Kamil Ďurana, Jiří Maděra, Robert Černý   +4 more
openaire   +1 more source

Advanced Thermal-Moisture Analogy Scheme for Anisothermal Moisture Diffusion Problem

ASME 2007 InterPACK Conference, Volume 2, 2007
We propose an advanced thermal-moisture analogy scheme to cope with the inherent limitations of the existing schemes. The new scheme is based on the experimentally-observed unique hygroscopic behavior of polymeric materials used in microelectronics; i.e., the saturated concentration is only a function of relative humidity regardless of temperature.
Changsoo Jang, Seungbae Park, Bongtae Han, Samson Yoon   +3 more
openaire   +1 more source