Journal ArticleDOI
Comparison of k-ε models in gaseous release and dispersion simulations using the CFD code FLACS
TLDR
Assessment of three well-known RANS eddy viscosity models, namely, Standard k-e, Re-Normalization group (RNG) k-E and Realizable k- e, in a representative range of gas dispersion cases by comparing models’ behavior with experimental data shows promise in yielding good results in cases involving complex-geometries and dense-phase gas-releases.About:
This article is published in Process Safety and Environmental Protection.The article was published on 2019-10-01. It has received 35 citations till now. The article focuses on the topics: Turbulence modeling & Reynolds-averaged Navier–Stokes equations.read more
Citations
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Journal ArticleDOI
Migration characteristics of CO under forced ventilation after excavation roadway blasting: A case study in a plateau mine
TL;DR: In this article, a three-dimensional unsteady roadway model was established based on field data of the Pulang copper mine in Yunnan province, China, and grey correlation analysis was applied to study the correlation values of the influencing factors on the CO dispersion coefficient in the roadway.
Journal ArticleDOI
Evaluation and prediction of the safe distance in liquid hydrogen spill accident
TL;DR: In this paper, three-dimensional CFD simulations predicting liquid hydrogen spill in open environment are performed, and variation characteristics of safe distance with different parameters are analyzed, and the safe distance is positively related to liquid spill rate, while the increase rate slows down gradually.
Journal ArticleDOI
CFD analysis of the influence of a perimeter wall on the natural gas dispersion from an LNG pool
TL;DR: In this paper, the authors developed an innovative tool to support the simulation of gas dispersion from liquefied natural gas pools in presence of obstacles, coupling integral models and computational fluid dynamics (CFD).
Journal ArticleDOI
Study on CO diffusion law and concentration distribution function under ventilation after blasting in high-altitude tunnel
TL;DR: Wang et al. as mentioned in this paper studied the influence of high-altitude environment on the diffusion and concentration distribution of hazardous gases after tunnel blasting, a ventilation model for construction tunnel was established based on a tunnel of the Sichuan-Tibet Railway, and the dynamic diffusion of CO at different altitudes was numerically simulated.
Journal ArticleDOI
Dispersion characteristics and hazard area prediction of mixed natural gas based on wind tunnel experiments and risk theory
TL;DR: In this paper, the authors combined wind tunnel experiments, computational fluid dynamics (CFD) technology, and risk theory to explore the dispersion characteristics and hazardous area of released mixed natural gas (M-NG) in complex terrain.
References
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Journal ArticleDOI
The numerical computation of turbulent flows
Brian Launder,D. B. Spalding +1 more
TL;DR: In this paper, the authors present a review of the applicability and applicability of numerical predictions of turbulent flow, and advocate that computational economy, range of applicability, and physical realism are best served by turbulence models in which the magnitudes of two turbulence quantities, the turbulence kinetic energy k and its dissipation rate ϵ, are calculated from transport equations solved simultaneously with those governing the mean flow behaviour.
Journal ArticleDOI
A new k-ϵ eddy viscosity model for high reynolds number turbulent flows
TL;DR: In this article, a new k -ϵ eddy viscosity model, which consists of a new model dissipation rate equation and a new realizable eddy viscous formulation, is proposed.
Journal ArticleDOI
The prediction of laminarization with a two-equation model of turbulence
W.P. Jones,Brian Launder +1 more
TL;DR: In this article, the local turbulent viscosity is determined from the solution of transport equations for the turbulence kinetic energy and the energy dissipation rate, and the predicted hydrodynamic and heat-transfer development of the boundary layers is in close agreement with the measured behaviour.
Journal ArticleDOI
Development of turbulence models for shear flows by a double expansion technique
TL;DR: In this article, a two-equation model and Reynolds stress transport model are developed for turbulent shear flows and tested for homogeneous shear flow and flow over a backward facing step.
Book
Turbulence Models and Their Application in Hydraulics
TL;DR: In this article, the authors provide an introduction to the subject of turbulence modelling in a form easy to understand for anybody with a basic background in fluid mechanics, and summarize the present state of the art.