A turbulent-transport model for concentration fluctuations and fluxes
A second-order closure model describing the diffusion of a passive scalar from a small source is presented. The model improves upon the earlier work of Lewellen & Teske (1976) by ensuring the early stage of the release, the so-called meander phase, is accurately described. In addition to the mea...
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| Veröffentlicht in: | Journal of fluid mechanics 1984-02, Vol.139, p.193-218 |
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| container_title | Journal of fluid mechanics |
| container_volume | 139 |
| creator | Sykes, R. I. Lewellen, W. S. Parker, S. F. |
| description | A second-order closure model describing the diffusion of a passive scalar from a small source is presented. The model improves upon the earlier work of Lewellen & Teske (1976) by ensuring the early stage of the release, the so-called meander phase, is accurately described. In addition to the mean concentration and scalar fluxes, a model equation for the evolution of the scalar variance is proposed. The latter introduces a new lengthscale which represents the scale of the concentration fluctuations. The model predictions are compared with the recent experimental data of Fackrell & Robins (1982a, b). |
| doi_str_mv | 10.1017/S002211208400032X |
| format | Article |
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The model predictions are compared with the recent experimental data of Fackrell & Robins (1982a, b).</description><subject>Exact sciences and technology</subject><subject>Fluid dynamics</subject><subject>fluid mechanics</subject><subject>fluxes</subject><subject>Fundamental areas of phenomenology (including applications)</subject><subject>modeling</subject><subject>numerical analysis</subject><subject>Physics</subject><subject>turbulence</subject><subject>Turbulent flows, convection, and heat transfer</subject><issn>0022-1120</issn><issn>1469-7645</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>1984</creationdate><recordtype>article</recordtype><recordid>eNqNkU9LHEEQxZugkFXzAXKbQzCniVX9d_soizFRQURDcmt6e7rD6Oz0prsH9Nvbm128COKpinq_Vzx4hHxG-IaA6uQWgFJECnMOAIz--UBmyKVuleRij8w2crvRP5KDnO8BkIFWM3J22pQpLafBj6UtyY55HVNpVrHzQxNialwcXdWSLX0cmzBMrkz_99zYsdscHn0-IvvBDtl_2s1D8uv72d3iR3t1ff5zcXrVOoGitMKJ0DkWcK4RfWCqBg3Ua6U6Bw5U6Oi8Y2yp550VSnOJlMslSM6crKRmh-Tr9u86xX-Tz8Ws-uz8MNjRxykbxXmFKWOVPH6TpJwrrsT7QNCCvweUWqCqIG5Bl2LOyQezTv3KpieDYDZlmVdlVc-X3XObnR1CLcL1-cWoJUVgWLF2i_W5-McX2aYHIxVTwsjzmxrk8hZ_XyzMTeXZLopdLVPf_fXmPk5prB29EeYZpnOw2g</recordid><startdate>19840201</startdate><enddate>19840201</enddate><creator>Sykes, R. 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Fluid Mech</addtitle><date>1984-02-01</date><risdate>1984</risdate><volume>139</volume><spage>193</spage><epage>218</epage><pages>193-218</pages><issn>0022-1120</issn><eissn>1469-7645</eissn><coden>JFLSA7</coden><abstract>A second-order closure model describing the diffusion of a passive scalar from a small source is presented. The model improves upon the earlier work of Lewellen & Teske (1976) by ensuring the early stage of the release, the so-called meander phase, is accurately described. In addition to the mean concentration and scalar fluxes, a model equation for the evolution of the scalar variance is proposed. The latter introduces a new lengthscale which represents the scale of the concentration fluctuations. The model predictions are compared with the recent experimental data of Fackrell & Robins (1982a, b).</abstract><cop>Cambridge, UK</cop><pub>Cambridge University Press</pub><doi>10.1017/S002211208400032X</doi><tpages>26</tpages></addata></record> |
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| ispartof | Journal of fluid mechanics, 1984-02, Vol.139, p.193-218 |
| issn | 0022-1120 1469-7645 |
| language | eng |
| recordid | cdi_proquest_miscellaneous_744643233 |
| source | Cambridge University Press Journals Complete |
| subjects | Exact sciences and technology Fluid dynamics fluid mechanics fluxes Fundamental areas of phenomenology (including applications) modeling numerical analysis Physics turbulence Turbulent flows, convection, and heat transfer |
| title | A turbulent-transport model for concentration fluctuations and fluxes |
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