Simulation of Coyote series trials - Part II: A computational approach to ignition and combustion of flammable vapor clouds

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dc.contributor.author Rigas, F en
dc.contributor.author Sklavounos, S en
dc.date.accessioned 2014-03-01T01:25:09Z
dc.date.available 2014-03-01T01:25:09Z
dc.date.issued 2006 en
dc.identifier.issn 0009-2509 en
dc.identifier.uri http://hdl.handle.net/123456789/17566
dc.subject Cloud fire en
dc.subject Combustion en
dc.subject Coyote trials en
dc.subject Eddy dissipation model en
dc.subject Flash fire en
dc.subject Ignition en
dc.subject P1 model en
dc.subject Thermal radiation en
dc.subject.classification Engineering, Chemical en
dc.subject.other Computer simulation en
dc.subject.other Flammable materials en
dc.subject.other Heat radiation en
dc.subject.other Ignition en
dc.subject.other Induction heating en
dc.subject.other Pressure effects en
dc.subject.other Thermal load en
dc.subject.other Vapors en
dc.subject.other Cloud fire en
dc.subject.other Coyote trials en
dc.subject.other Eddy dissipation model en
dc.subject.other Flash fire en
dc.subject.other Combustion en
dc.subject.other fluid dynamics en
dc.title Simulation of Coyote series trials - Part II: A computational approach to ignition and combustion of flammable vapor clouds en
heal.type journalArticle en
heal.identifier.primary 10.1016/j.ces.2005.09.005 en
heal.identifier.secondary http://dx.doi.org/10.1016/j.ces.2005.09.005 en
heal.language English en
heal.publicationDate 2006 en
heal.abstract Accidental releases of flammable gases may lead to major fires with extensive effects on the surroundings, mainly due to the intense thermal load emissions. In this paper, a computational approach based on fluid dynamics techniques was attempted aiming at the estimation of resulting thermal radiation emissions and overpressure in large scale cloud fires. In particular, the work dealt with the simulation of Coyote series trials, which conducted in 1981 by Lawrence Livermore National Laboratory (LLNL) and involved the release, dispersion, ignition and combustion of unconfined natural gas clouds in the open-air. In the computations, the CFD code CFX 5.7 was utilized which, in addition to the standard three-dimensional Navier-Stokes equations, incorporates the k-epsilon. model for turbulence modeling, the Eddy Dissipation model for combustion and PI model for radiation transport modeling. Computational thermal radiation histories were compared with experimental data from totally four trials showing a reasonably good agreement for several locations in the field. Discrepancies were laid on overestimation of the thermal load receipted at a certain location, nevertheless within a factor-of-two of the observed values. Moreover, positive peak overpressures were sufficiently low to indicate that the combustion of the cloud yielded a flash fire rather than an explosion. (c) 2005 Elsevier Ltd. All rights reserved. en
heal.journalName Chemical Engineering Science en
dc.identifier.doi 10.1016/j.ces.2005.09.005 en
dc.identifier.isi ISI:000235324600010 en
dc.identifier.volume 61 en
dc.identifier.issue 5 en
dc.identifier.spage 1444 en
dc.identifier.epage 1452 en

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