منابع مشابه
Electron Swarm Parameters in Water Vapor
Electron swarm parameters, such as the drift velocity and the ionization coefficient, in water vapor have been measured for relatively wide ranges in reduced electric fields (E/N) at room temperature. The drift velocity (Wm) was obtained based upon the arrival-time spectra of electrons by using a double-shutter drift tube for the E/N from 60 to 1000 Td, while the first and second ionization coe...
متن کاملOn water vapor transport in field soils
Measurements of soil volumetric moisture content and temperature were made at 2, 4, 7, 10, and 15 cm below the surface of a bare field soil, over a 1-week period at 20-min intervals. The conductive heat and liquid moisture fluxes were calculated for the soil layer 7–10 cm below the surface, and the water vapor flux was then determined from both the energy transfer and mass transfer equations. W...
متن کاملAtmospheric Water Vapor Transport and the Water Balance of North
The atmospheric water vapor flux divergence and certain aspects of the water balance of North America are investigated, using data from the period May 1, 1958-Apr. 30, 1963. The mean vertical distribution of flux divergence is computed for the United States for the months of January (1962, 1963) and July (1961, 1962). Strong flux convergence in the lowest kilometer and divergence in the remaind...
متن کاملWater vapor transport in soils from a pervaporative
4 A novel method for irrigation with saline water uses a polymer membrane, formed 5 into a tube, to treat and distribute the water simultaneously. The flux of water across 6 the membrane occurs by the process of pervaporation, during which a phase change from 7 liquid to vapor occurs. Thus water arrives in the soil in vapor phase. The experimental 8 results presented in this paper demonstrate t...
متن کاملNumerical Analysis of Coupled Water, Vapor, and Heat Transport in the Vadose Zone
Vapor movement is often an important part in the total water flux in the vadose zone of arid or semiarid regions because the soil moisture is relatively low. The twomajor objectives of this study were to develop a numerical model in the HYDRUS-1D code that (i) solves the coupled equations governing liquid water, water vapor, and heat transport, together with the surface water and energy balance...
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ژورنال
عنوان ژورنال: Japanese Journal of Applied Physics
سال: 2016
ISSN: 0021-4922,1347-4065
DOI: 10.7567/jjap.55.07ld03