Author
Samuel A.E.G. Falle
Bio: Samuel A.E.G. Falle is an academic researcher from University of Leeds. The author has contributed to research in topics: Pipeline transport & Atmospheric dispersion modeling. The author has an hindex of 12, co-authored 23 publications receiving 413 citations.
Papers
More filters
TL;DR: In this article, a mathematical model capable of predicting the shock and flow structure of turbulent, underexpanded jets is described, based on solutions of the fluid flow equations obtained using a second-order accurate, finite-volume integration scheme together with an adaptive grid algorithm.
Abstract: A mathematical model capable of predicting the shock and flow structure of turbulent, underexpanded jets is described. The model is based on solutions of the fluid flow equations obtained using a second-order accurate, finite-volume integration scheme together with an adaptive grid algorithm. Closure of these equations is achieved using a k-e turbulence model coupled to the compressible dissipation rate correction proposed by Sarkar et al. Extending earlier work which demonstrated the ability of this model to predict the structure of moderately underexpanded jets, the present paper compares model predictions and experimental data, reported in the literature, on a number of highly underexpanded releases. The results obtained demonstrate that the model yields reliable predictions of shock structure in the near field, inviscid region of such jets, while in the far field results derived using the compressibility corrected turbulence model are adequate for predicting meanflow properties, and are superior to those obtained using a standard k-e approach.
63 citations
TL;DR: In this article, a computational fluid dynamic model capable of accurately representing the complex physics observed in such a release, essential if dispersion phenomena are to be accurately predicted, is presented. But the model is not suitable for the modeling of CO 2 pipelines and intermediate storage vessels.
52 citations
TL;DR: In this paper, a composite two-phase method was proposed to predict the thermodynamic physical properties of carbon dioxide (CO) above and below the triple point, applied in the context of Reynolds-Averaged Navier-Stokes computational modeling.
Abstract: The development of a novel composite two-phase method to predict the thermodynamic physical properties of carbon dioxide (CO) above and below the triple point, applied herein in the context of Reynolds-Averaged Navier-Stokes computational modeling has been detailed here. A number of approaches have been combined to make accurate predictions in all three phases (solid, liquid, and gas) and at all phase changes for application in the modeling of releases of CO at high pressure into the atmosphere. Predictions of a free release of CO into the atmosphere from a reservoir at a pressure of 10 MPa and a temperature of 283 K, typical of transport conditions in carbon capture and storage scenarios, is examined. A comparison of the results shows that the sonic CO jet that forms requires a three-phase equation of state including the latent heat of fusion to realistically simulate its characteristics.
44 citations
TL;DR: In this paper, the authors developed a mathematical model for predicting the near-field dispersion of CO following the puncture or rupture of a high pressure dense phase pipeline typical of those planned for transport usage in CCS.
35 citations
TL;DR: In this article, a mathematical model of confined, vented explosions of mixtures of methane and hydrogen of value in performing consequence and risk assessments is presented, based on solutions of averaged forms of the Navier-Stokes equations, with the equation set closed using k-α and second-moment turbulence models, and the turbulent burning velocity determined from correlations of data on CH4-H2 mixtures reported in the literature.
33 citations
Cited by
More filters
TL;DR: In this article, the authors present an exhaustive overview of the main experimental papers dealing with underexpanded jets, from those where there is clearly a lack of confidence, and some clues are given on the numerical methods that may be used if one wants to study such jets numerically, together with an emphasis on the specific thermodynamic difficulties associated to this kind of extreme conditions.
189 citations
TL;DR: In this article, the implicit large eddy simulation (ILES) approach was used with the 5th-order weighted essentially non-oscillatory (WENO) scheme.
102 citations
TL;DR: A brief summary of the main known hazards and risks associated with hydrogen injection into a natural gas grid and the latest progress in safety measures, the knowledge gaps and future research is provided in this paper.
96 citations
TL;DR: In this paper, the current state of development of the main technologies that have shown potential thus far at pilot or industrial scale for the treatment of gases within the steelmaking industry is presented, related to their ability to separate existing gas streams into the two main carbonbearing species, CO2 and CO.
85 citations
TL;DR: Carbon capture and utilization (CCU) has attracted increased attention as a means to mitigate and adapt to climate change as discussed by the authors, which regards CO2 as a raw material and reduces CO2 emissions.
Abstract: Carbon capture and utilization (CCU) has attracted increased attention as a means to mitigate and adapt to climate change. CCU technology regards CO2 as a raw material and reduces CO2 emissions. Ho...
85 citations