Study on the application of the variational multiscale method to LES/RANS hybrid models

变分多尺度方法在LES/RANS混合模型中的应用研究

• 批准号: 23760431
• 负责人: HASEBE Hiroshi
• 金额: $ 3万
• 依托单位: Nihon University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Young Scientists (B)
• 财政年份: 2011
• 资助国家: 日本
• 起止时间: 2011 至 2012
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-23760431/
• 关键词: 乱流モデル; 変分マルチスケール法; time dependent subscales モデル; VMS法; PIV解析; 流れの微細変動成分; Time dependent sub-scale; VMS-LESモデル; 流れの変動成分; MPI/OpenMPハイブリッド並列計算

In order to develop new LES / RANS hybrid turbulence models that do not clearly distinguish the region of RANS and that of LES, time dependent subscales model which is the latest model based on the variational multiscale models is focused on. Although, in a turbulent channel flow, it is compared with VMS-LES model, significant difference between two models was not observed at this stage. However, the number of integral points should be improved and it also should be studied in the other mesh patterns.

为了发展新的LES / RANS混合湍流模型，使RANS区域和LES区域不明显区分，本文重点研究了基于变分多尺度模型的最新模型--时间相关子尺度模型，虽然在湍流槽道流动中与VMS-LES模型进行了比较，但在现阶段两种模型之间没有明显的差异。但积分点的个数还有待提高，在其他网格模式下也需要进一步研究。