External Intermittency Simulation in Turbulent Round Jets

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dc.contributor.author Gilliland, T. -
dc.contributor.author Ranga Dinesh, K. K. J. -
dc.contributor.author Fairweather, M. -
dc.contributor.author Falle, S. A. E. G. -
dc.contributor.author Jenkins, Karl W. -
dc.contributor.author Savill, Mark A. -
dc.date.accessioned 2013-01-16T23:01:27Z
dc.date.available 2013-01-16T23:01:27Z
dc.date.issued 2012-09-30T00:00:00Z -
dc.identifier.issn 1386-6184 -
dc.identifier.uri http://dx.doi.org/10.1007/s10494-012-9403-2 -
dc.identifier.uri http://dspace.lib.cranfield.ac.uk/handle/1826/7737
dc.description.abstract Abstract to study passive scalar mixing and intermittency in turbulent round jets. Both simulation techniques are applied to the case of a low Reynolds number jet with Re between time-averaged results for the scalar field of the low Re case demonstrate reasonable agreement between the DNS and LES, and with experimental data and the predictions of other authors. Scalar probability density functions (pdfs) for this jet derived from the simulations are also in reasonable accord, although the DNS results demonstrate the more rapid influence of scalar intermittency with radial distance in the jet. This is reflected in derived intermittency profiles, with LES generally giving profiles that are too broad compared to equivalent DNS results, with too low a rate of decay with radial distance. In contrast, good agreement is in general found between LES predictions and experimental data for the mixing field, scalar pdfs and external intermittency in the high Reynolds number jet. Overall, the work described indicates that improved sub-grid scale modelling for use with LES may be beneficialDirect numerical and large eddy simulation (DNS and LES) are applied= 2,400, whilst LES is also used to predict a high Re = 68,000 flow. Comparison en_UK
dc.language.iso en_UK -
dc.publisher Springer Science Business Media en_UK
dc.subject DNS en_UK
dc.subject LES en_UK
dc.subject Scalar field en_UK
dc.subject Intermittency en_UK
dc.subject Round jet en_UK
dc.title External Intermittency Simulation in Turbulent Round Jets en_UK
dc.type Article -

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