ODTLES : a model for 3D turbulent flow based on one-dimensional turbulence modeling concepts.

McDermott, Randy ; Kerstein, Alan R. ; Schmidt, Rodney Cannon

Sandia National Laboratories

关键词: Turbulent Flow;    99 General And Miscellaneous//Mathematics, Computing, And Information Science;    Turbulent Flow-Computer Simulation.;    Turbulence-Mathematical Models.;    Performance Testing;   

DOI  :  10.2172/921740
RP-ID  :  SAND2005-0206
RP-ID  :  AC04-94AL85000
RP-ID  :  921740

美国|英语

来源: UNT Digital Library

【 摘 要 】

This report describes an approach for extending the one-dimensional turbulence (ODT) model of Kerstein [6] to treat turbulent flow in three-dimensional (3D) domains. This model, here called ODTLES, can also be viewed as a new LES model. In 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 and evaluated by performing simulations of decaying isotropic turbulence, a standard turbulent flow benchmarking problem.