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 cla…

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 mode…

Reacting flows are of great importance in many power engineering applications. A few examples are:Combustion processes, exhaust gas cleaning processes,chemicalenergy storage, etc. They are governed by a complex interplay of chemical reactions, flow and transport processes and can be described math…

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 o…

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 …

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 inte…

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 …

The presentation deals with the research efforts to facilitate an efficient conversion of coal-fired power plants to biomass, retaining a high electrical efficiency with a broad fuel-band. This effort has specifically addressed challenges related to biodust combustion on central power plants, incl…