This second part of a two-part study examines the lightning and charge structure evolution of the 29 June 2000 tornadic supercell observed during the Severe Thunderstorm Electrification and Precipitation Study (STEPS). Data from the National Lightning Detection Network and the New Mexico Tech Lightning Mapping Array (LMA) are used to quantify the total and cloud-toground (CG) flash rates. Addit...

This paper explores a method by which an unpowered, fixed-wing micro air vehicle (MAV) may autonomously gain height by utilising orographic updrafts in urban environments. These updrafts are created when wind impinges on both man-made and natural obstacles, and are often highly turbulent and very localised. Thus in contrast to most previous autonomous soaring research, which have focused on lar...

A simplified solar updraft device adapted from the Trombe wall concept was built to process large-scale airflow using only energy. The performances were systematically studied experimental measurements and numerical models, with focus of investigating whether this can generate enough under low intensities, developing a fast-analytical mathematical model effectively efficiently find design rules...

Introduction Conclusions References Tables Figures Back Close Full Screen / Esc Abstract Introduction Conclusions References Tables Figures Back Close Full Screen / Esc Printer-friendly Version Interactive Discussion EGU Abstract Aitken mode particles are potentially an important source of cloud droplets in continental background areas. In order to find out which physico-chemical properties of ...

Rubber wood (Ficus elastica) is one the biomass waste that can be used as raw material for a gasification process and has a calorific value of 4,069 cal/gram. Gasification is a process to convert a solid fuel to syngas (CO, CH4, and H2) through a combustion process using limited air between 20% to 40% of air stoichiometry. Depending on the direction of airflow, the gasifiers are classified as u...

Limited information is available about the thermodynamic evaluation for biomass gasification process using updraft gasifier. Therefore, to minimize errors, the gasification of dry refinery sludge (DRS) is carried out in adiabatic system at atmospheric pressure under ambient air conditions. The objectives of this paper are to investigate the physical and chemical energy and exergy of product gas...

This study focuses on the development of an internal potential flow solution in context a hemispherically bounded cyclonic chamber. The analysis proceeds from Bragg–Hawthorne equation, which is quite effective treatment steady, inviscid, and axisymmetric flows when expressed terms streamfunction. Once streamfunction obtained, other properties are readily deduced; these include principal velocit...