The significant contribution of stochastic forcing to nonlinear energy transfer in resolvent analysis  

作　　者：Youhua Wang Ting Wu Guowei He 

机构地区：[1]Department of Modern Mechanics,University of Science and Technology of China,Hefei 230026,China [2]The State Key Laboratory of Nonlinear Mechanics,Institute of Mechanics,Chinese Academy of Sciences,Beijing 100190,China [3]School of Engineering Sciences,University of Chinese Academy of Sciences,Beijing 100049,China

出　　处：《Theoretical & Applied Mechanics Letters》2025年第1期1-4,共4页力学快报(英文版)

基　　金：supported by the National Natural Science Foundation of China(NSFC)Basic Science Center Program for Multiscale Problems in Nonlinear Mechanics(Grant No.11988102).

摘　　要：Nonlinear energy transfer is represented through eddy viscosity and stochastic forcing within the framework of resolvent analysis.Previous investigations estimate the contribution of eddy-viscosity-enhanced resolvent opera-tor to nonlinear energy transfer.The present article estimates the contribution of stochastic forcing to nonlinear energy transfer and demonstrates that the contribution of stochastic forcing cannot be ignored.These results are achieved by numerically comparing the eddy-viscosity-enhanced resolvent operator and stochastic forcing with nonlinear energy transfer in turbulent channel flows.Furthermore,the numerical results indicate that composite resolvent operators can improve the prediction of nonlinear energy transfer.

关 键 词：Resolvent analysis Energy transfer Eddy viscosity Stochastic forcing Composite sweeping-enhanced resolvent` 

分 类 号：O357[理学—流体力学]