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THMT-15. Proceedings of the Eighth International Symposium On Turbulence Heat and Mass Transfer
September, 15-18, 2015, Sarajevo, Bosnia and Herzegovina

DOI: 10.1615/ICHMT.2015.THMT-15


ISBN Print: 978-1-56700-427-4

ISBN CD: 978-1-56700-428-8

Turbulent entrainment in jets and plumes

pages 175-178
DOI: 10.1615/ICHMT.2015.THMT-15.240
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SINOPSIS

We perform direct simulation of a statistically steady jets, forced plume and pure plume in a neutral environment and present the value of the entrainment coefficient decomposed into 1) turbulence production; 2) buoyancy effects; and 3) deviations from self-similarity. The value of the decomposed entrainment coefficient is in excellent agreement with a direct estimate from the volume conservation equation. It is shown that the Priestley and Ball entrainment model describes the entrainment physics reasonably well.

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