The University of Tokyo · Environmental Science
Professor Bingchao Zhang's research lab specializes in fluid dynamics and wind engineering, with a focus on numerical simulation and data-driven analysis of turbulent flows around buildings and urban structures. The lab employs advanced techniques such as large eddy simulation (LES), spectral proper orthogonal decomposition (SPOD), and extended SPOD (ESPOD) to extract coherent flow structures and quantify their contributions to wind loads and pressure distributions. Research also extends to agricultural engineering, particularly in the design of automated systems for seedling handling using fluidic actuation principles. The lab integrates computational fluid dynamics with real-world applications, from urban wind environment assessment to sustainable agricultural machinery development.
Figures are computed from collected data and may differ slightly.
This study reproduced the main flow features around a square-section building model via a spectral proper orthogonal decomposition (SPOD) analysis, performed on the three-dimensional velocity field obtained by large eddy simulation. Using this single technique, we presented a spectrum view of the turbulent structures around the square-section cylinder, quantitatively revealing the primary frequency and relative intensity of all the structures at once. The identified features, including the low-f
Proper orthogonal decomposition (POD) has been used in numerous studies in wind engineering to extract key features of a building's surrounding flow field and surface pressure, the connections between which, however, remain difficult to quantify. This study combined the extended POD with spectral POD (SPOD) method into a new method called extended SPOD (ESPOD) to correlate flow structures with surface pressure. SPOD wind force spectra were defined to quantify how much each pair of velocity and p
Although travelling to unusual destinations has aroused great interest among tourists, little is known about which aspects of these destinations compel tourists to visit. This study focused on the authenticity of revealed preference data and the favourable statistical characteristics of stated preference data through two studies, taking North Korea as an example of an unusual destination. Specifically, this study examined Chinese tourists’ preferences for travelling to this country by considerin
In this study, a closed multi-channel air-blowing plug seedling pick-up device and a combined plug tray were designed to address the issues of complex structure, high seedling damage rates and low pick-up efficiency in fully automated vegetable transplanter systems. The device operates by sealing the plug seedlings in a seedling cup, where compressed air is channeled into the sealed cavity through multiple passages during the seedling pick-up process. The upper surface of the seedling plug is su
Abstract A constant cross‐section wind tunnel usually experiences a negative pressure gradient (ie, favorable pressure gradient, FPG), resulting in a certain degree of discrepancy between the simulated and idealized atmospheric boundary layer (ABL) flows. To investigate its impact, three large‐eddy simulation (LES) cases were conducted in this study: one simply reproduced a wind tunnel, one removed the FPG by adjusting the ceiling height, and one reduced the FPG by canceling unnecessary boundary
In recent years, frequent typhoon-induced disasters have significantly increased the risk of power grid outages, posing severe challenges to the secure and stable operation of distribution grids with high penetration of distributed photovoltaic (PV) systems. Furthermore, during post-disaster recovery, the dual uncertainties of distributed PV output and the charging/discharging behavior of flexible resources such as electric vehicles (EVs) complicate the configuration and scheduling of mobile ene
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