Rationale for implicit turbulence modeling.

Margolin, L. G. ; Rider, W. J.

Technical Information Center Oak Ridge Tennessee

关键词: Turbulent flows;    Modifications;    Scale models;    Turbulence;    Nonoscillatory finite volume;   

RP-ID  :  DE2001780353

学科分类：工程和技术（综合）

美国|英语

来源: National Technical Reports Library

【 摘 要 】

We present a rationale for the success of nonoscillatory finite volume (NFV) difference schemes in modeling turbulent flows without need of subgrid scale models. Our exposition focuses on certain truncation terms that appear in the modified equation of one particular NFV scheme, MPDATA. We demonstrate that these truncation terms have physical justification, representing the modifications to the governing equations that arise when one considers the motion of finite volumes of fluid over finite intervals of time.