| タイトル | Conditional statistics in a turbulent premixed flame derived from direct numerical simulation |
| 本文（外部サイト） | http://hdl.handle.net/2060/19950016021 |
| 著者（英） | Mantel, Thierry; Bilger, Robert W. |
| 著者所属（英） | Stanford Univ. |
| 発行日 | 1994-12-01 |
| 言語 | eng |
| 内容記述 | The objective of this paper is to briefly introduce conditional moment closure (CMC) methods for premixed systems and to derive the transport equation for the conditional species mass fraction conditioned on the progress variable based on the enthalpy. Our statistical analysis will be based on the 3-D DNS database of Trouve and Poinsot available at the Center for Turbulence Research. The initial conditions and characteristics (turbulence, thermo-diffusive properties) as well as the numerical method utilized in the DNS of Trouve and Poinsot are presented, and some details concerning our statistical analysis are also given. From the analysis of DNS results, the effects of the position in the flame brush, of the Damkoehler and Lewis numbers on the conditional mean scalar dissipation, and conditional mean velocity are presented and discussed. Information concerning unconditional turbulent fluxes are also presented. The anomaly found in previous studies of counter-gradient diffusion for the turbulent flux of the progress variable is investigated. |
| NASA分類 | INORGANIC AND PHYSICAL CHEMISTRY |
| レポートNO | 95N22438 |
| 権利 | No Copyright |
| URI | https://repository.exst.jaxa.jp/dspace/handle/a-is/108427 |
