### 抜粋

The discrete-vortex model is applied to simulate the separation bubble over a two-dimensional blunt flat plate with finite thickness and right-angled corners, which is aligned parallel to a uniform approaching stream. This flow situation is chosen because, unlike most previous applications of the model, the separation bubble is supposed to be strongly affected by a nearby solid surface. The major objective of this paper is to examine to what extent the discrete-vortex model is effective for such a flow. A simple procedure is employed to represent the effect of viscosity near the solid surface; in particular, the no-slip condition on the solid surface. A reduction in the circulation of elemental vortices is introduced as a function of their ages in order to represent the three-dimensional deformation of vortex filaments. An experiment was also performed for comparison purposes. The calculation yielded reasonable predictions of the time-mean and r.m.s. values of the velocity and the surface-pressure fluctuations, together with correlations between their fluctuating components, over most of the separation bubble. The interrelation between instantaneous spatial variations of the surface-pressure and velocity fluctuations were also obtained. A comparison between the calculated and measured results suggests that, in the real flow, the three-dimensional deformation of vortex filaments will become more and more dominant as the reattachment point is approached.

元の言語 | 英語 |
---|---|

ページ（範囲） | 219-244 |

ページ数 | 26 |

ジャーナル | Journal of Fluid Mechanics |

巻 | 120 |

DOI | |

出版物ステータス | 出版済み - 1 1 1982 |

### フィンガープリント

### All Science Journal Classification (ASJC) codes

- Fluid Flow and Transfer Processes
- Modelling and Simulation

### これを引用

*Journal of Fluid Mechanics*,

*120*, 219-244. https://doi.org/10.1017/S0022112082002742