A Comprehensive Study of Improved Delayed Detached Eddy Simulation with Wall Functions

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• 作者：M. S. Gritskevich ; A. V. Garbaruk ; F. R. Menter
• 关键词：Improved delayed detached eddy simulation (IDDES) ; Wall functions (FW) ; Hybrid RANS ; LES methods (HRLM)
• 刊名：Flow, Turbulence and Combustion
• 出版年：2017
• 出版时间：March 2017
• 年：2017
• 卷：98
• 期：2
• 页码：461-479
• 全文大小：
• 刊物类别：Engineering
• 刊物主题：Engineering Fluid Dynamics; Fluid- and Aerodynamics; Engineering Thermodynamics, Heat and Mass Transfer; Automotive Engineering;
• 出版者：Springer Netherlands
• ISSN：1573-1987
• 卷排序：98

文摘

The paper presents the results of Improved Delayed Detached Eddy Simulation (IDDES) in combination with wall functions for the wall boundary conditions specification. It is shown that good agreement with the solutions on the conventional grids with \({\Delta } y^{+}_{w}\)<1 can be achieved on grids with wall-normal steps gradually changing between 1 % and 5 % of the boundary layer thickness near the wall and in the core-flow respectively. At the same time, using of coarser grids results in a noticeable discrepancy for the mean and RMS velocity, which is attributed to the lack of the wall-normal resolution rather than to the wall boundary conditions.