Results 261 to 270 of about 76,997 (309)

Plume rise model for merging plumes

2023
To correctly reproduce the dispersion of pollutants the plume rise modeling is fundamental to obtain the injection height, i.e. the altitude at which the majority of the smoke burden is released into the surrounding atmosphere, because from this depends how the plume from fire emissions are ultimately transported In 2013 ...
Enrico Ferrero, Bianca Tenti, Stefano Alessandrini   +2 more
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Particle Simulation of Plume-Plume and Plume-Surface Interactions

2004
Abstract : Numerical modeling of two- and three-dimensional low Reynolds number gas flows from small nozzles has been performed using the direct simulation (DSMC) method. The objective of this effort is to gain an improved understanding of performance and plume interaction phenomena for low thrust devices and thus improve the design and optimization ...
D. C. Wadsworth, A. D. Ketsdever, S. F. Gimeishein   +2 more
openaire   +1 more source

Building downwash of plumes and plume interactions

Journal of Wind Engineering and Industrial Aerodynamics, 1995
This paper presents a number of wind tunnel measurements of building induced downwash effects on the plume in a neutrally stable boundary layer. Vertical and horizontal profiles of mass concentrations of the exhausts from stacks on a rectangular model building were measured downwind of the buoyant source in the near wake.
J.C.K. Cheung, W.H. Melbourne
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Plume flow and plume impingement in space technology

Progress in Aerospace Sciences, 1991
Abstract Rocket thrusters of various types are the common means of propulsion in space technology. In the space vacuum the exhaust gases form a large free jet, called a plume, which can impinge on neighbouring surfaces. The impingement effects, often unavoidable due to the unrestricted spreading of the gas, are disturbing forces and unwanted heat ...
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Plume–Plume and Plume–Surface Interactions of Micronozzle Clusters in Vacuum

AIAA Journal
Plume flow features and performance characteristics of micronozzles arranged in a cluster configuration operating under vacuum exit conditions are analyzed utilizing the direct simulation Monte Carlo (DSMC) method. A comparison of the plume behavior of single bell-shaped and conical nozzles is carried out to establish a baseline for evaluating cluster ...
Ashok Kumar, S. R. Shine
openaire   +1 more source

Mantle Plumes and Their Interactions

2022
Hotspots are regions of intraplate volcanism or especially strong volcanism along plateboundaries, and many of them are likely caused by underlying mantle plumes – localizedhot upwellings from deep inside the Earth. It is still uncertain, whether all plumes or justsome of them rise from the lowermost mantle, and to what extent and where theyentrain ...
Steinberger, B., Steinberger, A.
openaire   +3 more sources

Saffman-Taylor plumes

Physical Review Letters, 1992
We present an experimental study of thermal plumes growing in Hele-Shaw cells which shows the existence of new objects, analogous to Saffman-Taylor fingers, for which the thermal boundary layer plays the role of the interface.
, Zocchi, , Tabeling, , Ben Amar M
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Plumes and Concentric Plume Traces of the Eurasian Plate

Nature Physical Science, 1973
There are many more lines of volcanoes which increase in age from one end to the other than can be due to chance. One explanation which has been proposed is that volcanoes form overheated columns or plumes rising from deep in the mantle at fixed locations1.
KEVIN BURKE, W. S. F. KIDD, J. TUZO WILSON   +2 more
openaire   +1 more source

Plume

Ploughshares, 2015
Acclaimed publisher and editor Neil Astley, founder of Bloodaxe Books, guest-edits this special transatlantic all-poetry issue, featuring poets from North America, Great Britain, and Ireland. The issue contains a stirring diversity of work, with writers who have roots everywhere from Guyana to Pakistan to Zambia, and also features poetry in Welsh ...
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