نتایج جستجو برای: gaseous diffusion

تعداد نتایج: 175966  

2004
C. S. WANG X. H. WANG

Thermodynamic parameters of the hydriding reaction of a hydride electrode can be obtained by two different methods. The results show that the change of enthalpy AH, change of entropy AS and hydrogen pressure calculated from e-c-T curves of electrochemical reactions have much larger inherent errors compared with those obtained from p-c-T curves of alloys in hydriding reactions with hydrogen gas ...

Journal: :Optics express 2007
Adriaan van Brakel Christos Grivas Marco N Petrovich David J Richardson

Micro-channels were fabricated in hollow-core photonic bandgap fiber (HC-PBGF) and suspended-core holey fiber (SC-HF) by femtosecond Ti:sapphire laser irradiation. Gaseous access was demonstrated via these engineered ports to the core of HC-PBGF and the hollow cladding of SC-HF. Femtosecond laser micro-machining caused no additional transmission loss in HC-PBGFs. This allowed a novel gas cell t...

Journal: :International Journal of Occupational Medicine and Environmental Health 2010

Journal: :Journal of Research of the National Bureau of Standards Section A: Physics and Chemistry 1969

2000
D. Elstner K. Otmianowska-Mazur S. von Linden M. Urbanik

We investigate the evolution of three-dimensional (3D), large-scale galactic magnetic fields under the influence of time dependent gas flows in spiral arms and excited by a turbulent dynamo. Our principal goal is to check how the enhanced turbulent diffusion in spiral arms affects the global magnetic field structure evolving under the influence of the dynamically changing gaseous spiral arms. S...

2017
Bohao Wu Xingbo Li Ying Teng Pengfei Lv Yu Liu Tingting Luo Jianan Zheng Dayong Wang Lanlan Jiang

The CO2-brine dissolution homogenizes the distribution of residual CO2 and reduces the leakage risk in the saline aquifer. As a key parameter to immobilize the free CO2, the dissolution rate of CO2-brine could be accelerated through mechanisms like diffusion and dispersion, which are affected by the subsurface condition, pore structure, and background hydrological flow. This study contributed t...

2017
Laurent Boudin Bérénice Grec Francesco Salvarani LAURENT BOUDIN FRANCESCO SALVARANI

We consider the non-reactive elastic Boltzmann equation for multicomponent gaseous mixtures. We deduce, under the standard diffusive scaling, that well prepared initial conditions lead to solutions satisfying the Maxwell-Stefan diffusion equations in the vanishing Mach and Knudsen numbers limit.

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