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Dr. Zhang Yuning was Invited to the School to Give an Academic Report
Editor by:【admin】     On:【2018-10-14】
        On oct 12, 2018, at the invitation of professor Wan Decheng, Dr. Zhang Yuning of North China Electric Power University(Beijing) gave an academic report in Ruth Mulan Chuchao Building. The theme of the report is “Research and Application of Vortex Identification Method”, and the report is presided over by professor Wan Decheng. Dr.Zhang graduated from Tsinghua University with a bachelor's degree in 2008, five years later he received his PhD from Warwick university. Since 2014, Dr. Zhang has been working in the key laboratory of the state monitoring and control of power station equipment in North China Electric Power University and served as an associate professor. At present, he is mainly engaged in the basic theory and experimental research of high-speed flow phenomenon. In addition, Dr. Zhang also serves as deputy editor of IET Renewable Power Generation, editor of SCI journal, and chairman of international conference BBS. In the report, Dr.Zhang introduced an Omega criterion vortex identification method based on Galileo invariability. Dr.Zhang first introduced the common vortex structure in nature and its application in propeller cavitation, airfoil cavitation and pump cavitation, and the currently existing vortex identification methods are summarized, including direct method, vorticity method, pressure method, and the methods based on the Galileo invariance, Lagrange invariant and rotation invariance.


        Then Dr. Zhang introduced the new Omega method. The calculation results of plate boundary layer transition and shock wave boundary layer interaction under different parameters are presented. Compared with the calculation results of other vortex identification methods, Omega method has good robustness. In addition, Dr.Zhang also introduced the extensive application of Omega method in multiple scenes and interdisciplinary fields such as pathogen transmission in hospitals and turbulent atmospheric boundary layer.
          Finally, Dr Zhang summarized the advantages of the Omega method and looked forward to further improving the physical interpretation of the theory and some parameters and improving the stability of various flow analysis applications.

         After the report, Dr. Zhang also had an in-depth exchange of views with teachers and students. Through this report meeting, teachers and students at the meeting learned about the academic frontier direction and dynamics in the field of vortex identification, broadened their horizons, and accumulated valuable experience for carrying out relevant research.
 
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