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Modelling Gas Dispersion Articles & Analysis
16 articles found
A Lagrangian particle dispersion model for dense gas dispersion is proposed. It is a new version of MicroSpray oriented to simulate dense gas dispersion in urban or industrial environment, and includes the treatment of obstacles, complex terrain and low wind. The dense gas ...
This paper deals with the modification of a validated and operational heavy gas dispersion model, namely IIT Heavy Gas (IITHG) model-1, to propose a quantitative risk assessment tool named as IITD-QRA model. IITHG model-1 is modified based on the incorporation of appropriate ...
These projects result in predictive models and experimental data. To make these models and data available for a wider community and to judge their areas of application, the REDIPHEM project (REview and DIssemination of PHysical Effect Models) was started. This project covers two topics: heavy gas dispersion and ...
A valve control system was used to investigate the dispersion of the trace gases. This allowed measurements at up to 15 locations within a short period. ...
The heavy gas dispersion expert group is one of the three groups so far set up by the CEC Model Evaluation Group. ...
Numerical computations and field experiments of the dispersion of a tracer gas from a road tunnel in Paris are compared. The Reynolds-averaged Navier-Stokes equations, combined with the k-ε turbulence model of Chen and Kim, are solved using the finite-volume code PHOENICS. Results are shown to be sensitive to the turbulence ...
The harmonisation of gas dispersion modelling across Europe requires not only harmonisation of the physics incorporated into different mathematical models but also harmonisation of the way that practitioners actually use these models. This paper highlights the need to define minimum acceptable standards for ...
Closely related to MEG is REDIPHEM, which is the acronym of a research project supported by the EC Environment Research Programme focusing on assessment of the quality of experimental data and models for dense gas dispersion created within the EC funded research programmes. ...
The dense and highly toxic cloud of chlorine gas that formed in the vicinity of the accident was responsible for 9 fatalities and caused injuries to more than 500 others. ...
The numerical model we adopted was a combination of the potential flow model and Lagrangian stochastic dispersion model. ...
An LPG (liquefied petroleum gas) storage accident was reconstructed through several simulation models, with the aims of the reported and filmed effects and damage. ...
SMEDIS is a project currently in progress to develop a protocol for the scientific evaluation of dense gas dispersion (DGD) models, with particular emphasis on the complex effects of obstacles, terrain and aerosols often found in real situations, and then to apply this protocol to DGD models currently in use in Europe. This paper ...
The main objective of the project is to develop a methodology for the evaluation of dense gas atmospheric dispersion models used in the study of accidental releases of explosive or toxic materials. This evaluation is composed of a scientific assessment of each model, together with a validation by comparison with available ...
However, the averaging time associated with gas monitoring data in the region of a discharge may differ from the averaging time implicit in a model employed to predict the concentration resulting from that emission. Tables of factors exist for taking account of such differences and recent models include expressions that convert predicted values ...
This paper summarises an investigation of the uncertainties in Computational Fluid Dynamics (CFD) modelling of gas dispersion in the vicinity of buildings and complex terrain. ...
The Gas Dispersion Modelling Harmonisation Initiative has been successful in highlighting significant differences between models for quantifying the dispersion of gaseous emissions. ...