Over 30 years, we have accumulated technologies of heat exchange, dehumidification, and VOC concentration by TSA method using functional honeycomb rotors. By combining these technologies and newly developed CO2 concentration technology, we have developed CO2 separation and recovery apparatus anew. A part of the flue gas from the stack of an incineration plant was introduced into the CO2 separation and recovery apparatus. After removing moisture and hazardous chemical from the flue gas, CO2 was separated and recovered. By utilizing waste heat from incineration plant as a heat source, reducing CO2 recovery cost was suggested.
The authors invented a multi-fluids mixer with multifunction, which can generate microbubble, mist (i.e., tiny liquid droplet), and emulsion of immiscible liquids. In the present paper, the outline and the hydraulic performance of the mixer studied to date in Kumamoto University are described especially for its usage as the microbubble generator, with its application to water purification and healthcare.
We have developed special spray nozzle systems, which can be applied to dispersion, mixing, and atomization of fluids. Through the specially made spray nozzle, high speed swirling gas flow is generated, where liquid phase can be easily dispersed and atomized due to its strong shear stress, resulting in a good performance in various industrial processes. In this article we introduce the basic feature of our spray nozzle system, and its various applications to dispersion, mixing and atomization, including nanoparticle generation technology.
Numerical experiments on the interaction of self-driven particles in a fluid have been conducted in order to understand the collective motion of animal aggregates (flocks of birds, schools of fishes, etc.). In the model, a vortex-pair particle with a fixed center distance as the fluidic auto-propulsive particle (Flapper) was introduced. We analyzed the interaction between two Flappers in two spatial dimensions, and showed their fundamental behavior such as attractive and repulsive motions. Their behavior depends on the relative position and orientation between them because the hydrodynamic effect by the fluid flow around the objects plays an important role in their interaction process. We also examined the collective motion of 1000 Flappers hovering in a gravity field. The aggregation of Flappers maintains its shape (or formation) and position by incorporating a simple protocol to control the motion of each Flapper like animal' s taxis, while the aggregation collapses and diffuses without the protocol.