报告人单位：The Hong Kong Polytechnic University报告时间：2023年8月18日(周五) 10:00 AM 北京时间（UTC+8）
From milk homogenization to whitecaps in the ocean, fragmentation of bubbles and droplets in turbulence constitutes one of the most basic and practically important processes in turbulent multiphase flows. Most phenomenological models and simulations for this problem were developed based on the classical Kolmogorov-Hinze framework, even though some of the key assumptions and hypotheses in this fr…
lce crystals are found in clouds below freezing points. They are anisotropic, and over a temperature range, they are shaped like very thin disks. I will discuss the motion of such crystals in a turbulent flow. I will first discuss the alignment of crystals in the flow, and show that at low to moderate turbulence energy dissipation rate,settling crystals align predominantly with their broad face …
报告人单位：Karlsruhe Institute of Technology报告时间：2022年10月6日(周四) 03:00 PM 北京时间（UTC+8）
The high temperature reactivity of metal/metal oxides are important in a wide variety of industrial applications including solar-thermal hydrogen generation,CO2 sequestering, chemical-looping combustion, and energetic materials, among others. In this seminar I will discuss probing the reactivity of nanometals and metal oxides, towards developing a conceptual picture of rate limiting and phenomen…
We make use of highly resolved simulations to analyse the buoyancy-driven motion of two gas bubbles released in line in a liquid at rest. We first focus on regimes in which the path of an isolated bubble is vertical, and then consider highly inertial regimes in which a single bubble usually rises along azigzagging or spiraling path. The system is controlled by two parameters, namely the buoyancy…
Reporting and understanding of scientific phenomena are frequently communicated through the relation between input and response parameters. Consequently, the communication could be inadvertently biased or misleading when such parameters are either inappropriate or not optimum. Similarly, when interpreting an observed or calculated result, a key process or its quantifying parameters could be miss…
Biomass and solid waste are now widely used as important sections of sustainable carbon-neutral energy. The clean and efficient utilization of biofuel and solid waste faces substantial challenges due to the complex chemical compositions, like alkali metals, sulfur, and nitrogen compounds. Optical measurements are powerful tools in providing in-situ nonintrusive measurements and crucial data for …
