图书馆订阅: Guest
Third Symposium on Turbulence and Shear Flow Phenomena
June, 25-27, 2003, International Center, Sendai, Japan

DOI: 10.1615/TSFP3

DIFFERENTIAL EQUATION BASED LENGTH SCALE EVALUATIONS FOR DES, RANS AND MOVING GRID SOLUTIONS

pages 93-98
DOI: 10.1615/TSFP3.160
Get accessGet access

摘要

Surprisingly expensive to compute wall distances are still used in a range of key turbulence models. Potentially economical, accuracy improving differential equation based distance algorithms are described. These involve an elliptic Poisson and a hyperbolic natured Eikonal equation approach. Eikonal extension to a Hamilton-Jacob equation is discussed. Use of this to improve turbulence model accuracy and, along with the Eikonal, enhance Detached Eddy Simulation (DES) techniques is considered. Although less accurate than the Eikonal, Poisson method based flow solutions are extremely close to those using a search procedure. For a moving grid case the Poisson method is found especially efficient. Results show that with care the Eikonal equation can be solved on highly stretched, non-orthogonal, curvilinear grids.

Begell Digital Portal Begell 数字图书馆 电子图书 期刊 参考文献及会议录 研究收集 订购及政策 Begell House 联系我们 Language English 中文 Русский Português German French Spain