Results 261 to 270 of about 7,105,157 (297)

Calculation of the transport and relaxation properties of dilute water vapor

The Journal of Chemical Physics, 2009
Transport properties of dilute water vapor have been calculated in the rigid-rotor approximation using four different potential energy hypersurfaces and the classical-trajectory method. Results are reported for shear viscosity, self-diffusion, thermal conductivity, and volume viscosity in the dilute-gas limit for the temperature range of 250–2500 K. Of
Hellmann R, Bich E, Vogel E, Dickinson AS, Vesovic V   +4 more
openaire   +3 more sources

Water vapor transport in structurally varied polyurethans

Journal of Macromolecular Science, Part B, 1969
Abstract A study has been made on four chain-extended polyurethan (PU) elastomers differing only in the nature of the flexible segment, namely, poly(butylene adipate) (PBA), poly(tetramethvlene oxide) (PTMO), poly(propylene oxide) (PPO), and poly(ethylene oxide) (PEO).
N. S. Schneider, L. V. Dusablon, E. W. Snell, R. A. Prosser   +3 more
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Water Vapor Transport in Hydrophilic Polyurethanes

1974
Water uptake and water vapor transmission rates have been obtained on two series of hydrophilic segmented polyurethanes based on MDI, butanediol, and several block copolymer polyethers with varying proportions of poly(ethylene oxide) PEO and poly(propyleneoxide) PPO. In series I the ratio of PEO to PPO is varied at fixed hard segment concentration.
J. L. Illinger, N. S. Schneider, F. E. Karasz   +2 more
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Water vapor transport in a series of polyarylates

Journal of Membrane Science, 2001
Abstract Water vapor sorption and transport properties are presented for a series of polyarylates. The effect of making various structural changes in the polymer backbone has been studied, by comparing the transport properties to those of the base polymer bisphenol A isophthalate.
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Diffusion Transport of Water and Methanol Vapors in Polyvinyltrimethylsilane

Membranes and Membrane Technologies, 2019
The specifics of diffusion of water and methanol vapors in nonporous polymer films based on polyvinyltrimethylsilane (PVTMS) have been studied. The vapor diffusion coefficients have been determined by measuring the kinetics of unsteady flow through the membrane (differential method) and subsequent processing the results by functional scaling .
M. G. Shalygin, A. A. Kozlova, D. A. Syrtsova, S. Yu. Markova, O. R. Ryabova, V. V. Teplyakov   +5 more
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Water Vapor Transport Measurement across PEMs

ECS Transactions, 2014
Water vapor transport through the PEM is one of the key parameters that can help achieve high performance and low-cost fuel cell system. Ex-situ water vapor transport rate (WVTR) measurement is extremely difficult and expensive to measure. This transport depends on many parameters such as ionomer equivalent weight, ionomer type, thickness ...
Ramesh Yadav, Greg DiLeo, Nilesh Dale, Kenzo Oshihara   +3 more
openaire   +1 more source

Transport and Sorption of Water Vapor in Activated Carbon

Journal of Environmental Engineering, 1996
Control of organic vapors by adsorption on activated carbon can be impacted by the presence of water vapor in the gas stream. As a foundation to better understand this issue, the transport and sorption of water vapor within activated carbon grains were studied.
Tsair-Fuh Lin, William W. Nazaroff
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Transport coefficients for electrons in water vapor: Definition, measurement, and calculation

The Journal of Chemical Physics, 2011
Comparison of experimental and theoretical transport data for electron swarms in water vapour over a wide range of fields provides a rigorous test of (e−, H2O) scattering cross sections over a correspondingly broad range of energies. That like should be compared with like is axiomatic, but the definition of transport coefficients at high fields, when ...
Robson, R.E., White, R.D., Ness, K.F.
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Data for TRansport Of water VApor (TROVA) software test

2022
Necessary data for carrying out the tests using TRANSPORT OF WATER VApor (TROVA) software for forward and backward in time. The TROVA software, was developed in Python and Fortran for the study of moisture sources and sinks.
José C. Fernández‐Alvarez, Albenis Pérez‐Alarcón, Raquel Nieto, Luis Gimeno   +3 more
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Water Vapor Movement on Mass and Heat Transport in the Perspective of Water Vapor Buoyancy: A Review

Journal of Advanced Research in Numerical Heat Transfer
In 1957, the governing equation of mass and heat transport in the soil or porous media was popularised, now commonly referred to as PdV theory. This governing equation helps to quantify and simulate the water, vapor and heat in porous media. But at the same time, due to the fundamental uncertainty parameter in the equation, it was continuously updated.
null Khairul Ikhwan Mohd Jamalludin, null Sunny Goh Eng Giap, null Mohammad Fadhli Ahmad, null Hanhan Maulana, null Senny Luckyardi   +4 more
openaire   +1 more source