Water transport through the gas diffusion layer (GDL) of a proton exchange membrane (PEM) fuel cell is of critical importance in the operation of the fuel cell. In this study, the transport of water vapor through the GDL is investigated. A one-dimensional, single-phase heat and mass ...
Water transport through the gas diffusion layer (GDL) of a proton exchange membrane (PEM) fuel cell is of critical importance in the operation of the fuel cell. In this study, the transport of water vapor through the GDL is investigated. A one-dimensional, single-phase heat and mass transfe...
Water thermal diffusivity at atmospheric pressure, temperature given as °C or °F: . Water thermal diffusivity at 1, 10 and 100 bara (14.5, 145 and 1450 psia) pressure, temperature given as °C or °F: . Thermal diffusivity of water at atmospheric pressure and given temperature, SI and ...
In the early 1970s, Professor Dayananda developed a technique for the direct integration of fluxes from the concentration profiles in vapor-solid diffusion... O Karabelchtchikova,RD Sisson - 《Journal of Phase Equilibria & Diffusion》 被引量: 27发表: 2006年 Hydrodynamic fluctuations, diffusion an...
where p is the dry pressure in hPa, e the partial pressure of water vapor in hPa, and T the temperature in K. The term in brackets is usually termed the refractivity N. In the lower atmosphere, up to ∼20 km altitude, fluctuations in atmospheric density, temperature and humidity determi...
The water vapor feedback on ITCZ shifts is shown to be dominated by changes in the cross-equatorial asymmetry of the relative humidity of subtropical dry zones, with additional contributions by the changes in mixing ratio that occur at fixed relative humidity and by the meridional shift of the ...
Molecular diffusivities of Hg vapor in air, O-2 and N-2 near STP and the kinematic viscosity and thermal diffusivity of air near STP Accurate knowledge of the coefficients of molecular diffusivity (D) of trace gases, the kinematic viscosity of air (v) and the thermal diffusivity of air (....
03.166 水汽运动 vapor movement 03.167 土壤水[分]扩散率 soil water diffusivity ... www.360doc.com|基于3个网页 2. 土壤水分扩散率 土壤扩散度,diffusion of... ... ) soil water diffusivity 土壤水分扩散率 ) soil ion diffusion 土壤离子扩散 ... www.dictall.com|基于1 个网页...
Predictive theoretical models for mesoscopic roughening of ice require improved understanding of attachment kinetics occurring at the ice-vapor interface. Here, we use classical molecular dynamics to explore the generality and mechanics of a transition from anisotropic to isotropic self-diffusivity on expose...
The chapter deals with bulk movement, under isothermal conditions, of the liquid phase in response to mechanical driving forces. However, the transport of water in the gas phase by vapor diffusion will be included in the measured hydraulic conductivity and diffusivity, especially at low water ...