The electtical conductivity existing in electrified clouds is computed under the assumption that a primary positive dipole charge distribution exists within the cloud and that the small ion concentrations are controlled by the rate of ion production from cosmic ray ionization, and by the rates of ion loss from the separate processes of ion recombination, diffusion, and conduction. The results s...

Abstract In this study, a hybrid En3DVar data assimilation (DA) scheme is compared with 3DVar, EnKF, and pure for the of radar in real tornadic storm case. Results using hydrometeor mixing ratios (CVq) or logarithmic (CVlogq) as control variables are variational DA framework. To address lack radial velocity impact issues when CVq, procedure that assimilates reflectivity two separate analysis pa...

A perturbation of relative humidity is used as a trigger to start the convection in a two-dimensional numerical model of a cumulus cloud. The effects of varying the width and depth of the perturbation are studied. The rate of growth; eventual cloud height, liquid water content, and updraft strength are strongly dependent on depth of the impulse; but for realistically shallow depths, these value...

In this paper, capture efficiency of range hoods is measured for boiling water and non-boiling salad oil at 100℃ . The influence difference in thermal updraft over a pot with without the same temperature on discussed. Analytical conditions CFD using RANS to consider effect are studied.

Soot is an aerosol formed by incomplete combustion of carbonaceous materials, and its formation in biomass gasification inevitable. It crucial to know the properties soot produced exhaust reactors order appreciate both advantages disadvantages. In this study, a variety analytical techniques were used examine content morphology top-lit updraft gasifier. The results experiment revealed that carbo...

1 Abstract-The present paper presents an overview of the main characteristics of a novel kind of solar thermal application called solar chimney power plant. It is a technology of electric power generation using solar energy by employing basic physics that when air is heated it rises. The created updraft can be used to turn a turbine placed at an appropriate position within a tall chimney to gen...