scholarly journals Relating solute and gas dispersion in gravel at different transport velocities

2013 ◽  
Author(s):  
L. Pugliese ◽  
T. G. Poulsen ◽  
S. Straface
Keyword(s):  
Gas Dispersion

CFD analysis of the influence of a perimeter wall on the natural gas dispersion from an LNG pool

2021 ◽  
Vol 148 ◽  
pp. 751-764
Author(s):  
Marco Bellegoni ◽  
Federica Ovidi ◽  
Gabriele Landucci ◽  
Leonardo Tognotti ◽  
Chiara Galletti
Keyword(s):  
Natural Gas ◽  
Cfd Analysis ◽  
Gas Dispersion

scholarly journals Intelligent Mobile Wireless Network for Toxic Gas Cloud Monitoring and Tracking

Sensors ◽  
2021 ◽  
Vol 21 (11) ◽  
pp. 3625
Author(s):  
Mateusz Krzysztoń ◽  
Ewa Niewiadomska-Szynkiewicz
Keyword(s):  
Data Exchange ◽  
Mobility Model ◽  
Model Parameters ◽  
Toxic Substances ◽  
Cloud Detection ◽  
Gas Dispersion ◽  
Gas Concentration ◽  
Cloud Monitoring ◽  
Optimal Values ◽  
Gas Cloud

Intelligent wireless networks that comprise self-organizing autonomous vehicles equipped with punctual sensors and radio modules support many hostile and harsh environment monitoring systems. This work’s contribution shows the benefits of applying such networks to estimate clouds’ boundaries created by hazardous toxic substances heavier than air when accidentally released into the atmosphere. The paper addresses issues concerning sensing networks’ design, focussing on a computing scheme for online motion trajectory calculation and data exchange. A three-stage approach that incorporates three algorithms for sensing devices’ displacement calculation in a collaborative network according to the current task, namely exploration and gas cloud detection, boundary detection and estimation, and tracking the evolving cloud, is presented. A network connectivity-maintaining virtual force mobility model is used to calculate subsequent sensor positions, and multi-hop communication is used for data exchange. The main focus is on the efficient tracking of the cloud boundary. The proposed sensing scheme is sensitive to crucial mobility model parameters. The paper presents five procedures for calculating the optimal values of these parameters. In contrast to widely used techniques, the presented approach to gas cloud monitoring does not calculate sensors’ displacements based on exact values of gas concentration and concentration gradients. The sensor readings are reduced to two values: the gas concentration below or greater than the safe value. The utility and efficiency of the presented method were justified through extensive simulations, giving encouraging results. The test cases were carried out on several scenarios with regular and irregular shapes of clouds generated using a widely used box model that describes the heavy gas dispersion in the atmospheric air. The simulation results demonstrate that using only a rough measurement indicating that the threshold concentration value was exceeded can detect and efficiently track a gas cloud boundary. This makes the sensing system less sensitive to the quality of the gas concentration measurement. Thus, it can be easily used to detect real phenomena. Significant results are recommendations on selecting procedures for computing mobility model parameters while tracking clouds with different shapes and determining optimal values of these parameters in convex and nonconvex cloud boundaries.

scholarly journals Analysis on Characteristic of Hydrogen Gas Dispersion and Evaluation Method of Blast Overpressure in VHTR Hydrogen Production System

2006 ◽  
Vol 5 (4) ◽  
pp. 316-324 ◽  
Author(s):  
Tomoyuki MURAKAMI ◽  
Atsuhiko TERADA ◽  
Tetsuo NISHIHARA ◽  
Yoshiyuki INAGAKI ◽  
Kazuhiko KUNITOMI
Keyword(s):  
Hydrogen Production ◽  
Production System ◽  
Evaluation Method ◽  
Hydrogen Gas ◽  
Gas Dispersion ◽  
Blast Overpressure

scholarly journals Dense gas dispersion model development and testing for the Jack Rabbit II phase 1 chlorine release experiments

2018 ◽  
Vol 192 ◽  
pp. 218-240 ◽  
Author(s):  
Simon Gant ◽  
Jeffrey Weil ◽  
Luca Delle Monache ◽  
Bryan McKenna ◽  
Maria M. Garcia ◽  
...  
Keyword(s):  
Dispersion Model ◽  
Phase 1 ◽  
Model Development ◽  
Dense Gas ◽  
Gas Dispersion

Performance of a Gas Dispersion Impeller with Vertically Asymmetric Blades

1999 ◽  
Vol 77 (8) ◽  
pp. 728-730 ◽  
Author(s):  
K.J. Myers ◽  
A.J. Thomas ◽  
A. Barker ◽  
M.F. Reeder
Keyword(s):  
Gas Dispersion

Fundamentals of stack gas dispersion

1995 ◽  
Vol 29 (22) ◽  
pp. 3397 ◽  
Author(s):  
James P. Lodge
Keyword(s):  
Gas Dispersion ◽  
Stack Gas

Effect of Air and Sea Surface Temperatures on Liquefied Natural Gas Dispersion

2016 ◽  
Vol 30 (11) ◽  
pp. 9266-9274 ◽  
Author(s):  
Walter Chukwunonso Ikealumba ◽  
Hongwei Wu
Keyword(s):  
Natural Gas ◽  
Liquefied Natural Gas ◽  
Sea Surface ◽  
Sea Surface Temperatures ◽  
Gas Dispersion ◽  
Surface Temperatures
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