The 13th edition of Computing+ Seminar was held on Mar 30, 2023. Professor Jun Yao from the College of Mechanical and Transportation Engineering, China University of Petroleum-Beijing, presented his work Numerical simulation of multiphase flow in non-circular pipelines. The seminar was chaired by Dr. Kai Liu from Computing+ Engineering Laboratory, Shanghai Institute for Advanced Study, Zhejiang University. Professor Luo Kun, Deputy Director of the Institute, together with young researchers participated in the seminar on site, and researchers from Zhejiang University, China University of Petroleum etc, joint the seminar online.
The unique characteristics of turbulence secondary flow and quasi-order structure in non-circular pipeline multiphase turbulence, along with their comprehensive effects, make the internal viscous particle aggregation-breakage dynamics more complex than in ordinary pipe flow. This complexity is challenging for research community. In the lecture, Professor Yao detailed how his team addressed key issues, such as the unclear particle aggregation mechanism in multi-dispersed particle systems and the lack of coupling mechanisms for multi-scale turbulence structures and viscous particle aggregation processes.
Professor Yao demonstrated how to analyze the instantaneous turbulent structures and average secondary flow characteristics in different regions of non-circular pipe turbulence with multi-scale particle modulation effects via high-performance computing such as bidirectional and four-way coupling algorithms. He further shared the particle aggregation patterns in multi-dispersed particle systems combined with particle collision, particle modulation, turbulent quasi-order structure, and secondary flow. Additionally, he introduced the particle aggregation-breakage dynamics model in anisotropic turbulent stresses.
These studies reveal, from both qualitative and quantitative perspectives, the mechanisms of large-scale secondary flow structures and turbulent coherent structures on particle separation and aggregation behavior in square pipe turbulence. They also provide deeper insights into the interactions among secondary flow, turbulent coherent structures, particle collisions, and particle behavior in square pipe particle two-phase turbulence.
The audience showed great interest in Professor Yao's lecture and asked questions during the Q&A session. Professor Yao patiently answered all questions and engaged in an intense discussion with audiences onsite and online. The seminar was a success and continues the tradition of the Computing+ series.
About “Computing+” Seminar
The revolution characterized by intelligent computing has continued to drive the pervasive application of algorithms and computing power to information, life, and physical sciences, accelerating the construction of a joint world of human, physical world, intelligent machine and digital information science.
In this light, Shanghai Institute for Advanced Study, Zhejiang University launched 'Computing+' seminar series, inviting academics to share latest developments and exchange ideas and thoughts to further explore the intersections of computing with life sciences, engineering and social sciences.