ODTLES: A multi-scale model for 3D turbulent flow based on one-dimensional turbulence modeling

✍ Scribed by Rodney C. Schmidt; Alan R. Kerstein; Randall McDermott

• Publisher: Elsevier Science
• Year: 2010
• Tongue: English
• Weight: 917 KB
• Volume: 199
• Category: Article
• ISSN: 0045-7825
• DOI: 10.1016/j.cma.2008.05.028

✦ Synopsis

A novel multi-scale approach for extending the one-dimensional turbulence (ODT) model of [A.R. Kerstein. One-dimensional turbulence: model formulation and application to homogeneous turbulence, shear flows, and buoyant stratified flows, J. Fluid Mech. 392 (1999) 277] to treat turbulent flow in three-dimensional (3D) domains is described. In this model, here called ODTLES, 3D aspects of the flow are captured by embedding three, mutually orthogonal, one-dimensional ODT domain arrays within a coarser 3D mesh. The ODTLES model is obtained by developing a consistent approach for dynamically coupling the different ODT line sets to each other and to the large scale processes that are resolved on the 3D mesh. The model is implemented computationally and its performance is tested by performing simulations of decaying isotropic turbulence at two different Reynolds numbers and comparing to the experimental data of [H. Kang, S. Chester, C. Meneveau. Decaying turbulence in an active-grid-generated flow and comparisons with largeeddy simulations,