Analysis of Detached-Eddy Simulation for the Flow Around a Circular Cylinder with Reference to PIV Data |
| |
Authors: | Charles Mockett Rodolphe Perrin Thorsten Reimann Marianna Braza Frank Thiele |
| |
Institution: | 1.Insitute of Fluid Mechanics and Engineering Acoustics (ISTA),TU-Berlin,Berlin,Germany;2.Laboratoire d’études Aérodynamiques,Université de Poitiers, SP2MI, Téléport 2,Futuroscope Chasseneuil Cedex,France;3.Institut de Mécanique des Fluides de Toulouse (IMFT),Unité Mixte C.N.R.S.-I.N.P.T. 5502,Toulouse,France |
| |
Abstract: | A detailed validation study is presented for the detached-eddy simulation (DES) of the flow around a circular cylinder at
a high sub-critical Reynolds number. Good comparability with unsteady experimental field data is facilitated by the confined
and clearly-defined geometry, although some uncertainty remains regarding the free stream turbulence intensity. The combination
of DES with an appropriate low-dissipative hybrid numerical convection scheme and high temporal resolution delivers excellent
agreement with the experiment for the time and phase-averaged fields as well as the spectral content. A strong sensitivity
of the solution to the numerical time step size has been identified, which is attributed to time-filtering effects damping
the development of resolved turbulence in the early shear layer. Recommendations are made concerning a CFL-type criterion
for the temporal resolution of DES and future studies involving a still finer time step are outlined. |
| |
Keywords: | |
本文献已被 SpringerLink 等数据库收录! |
|