SEMINAR
To be held on Monday, December 7th, 2020, 12:10-13:00
via zoom meeting - link
Utilizing flow and acoustic waves for engineering and medical purposes: removal of particles from air and water, and removal of
secretions from the respiratory system
Prof. David Katoshevski
Environmental Eng. Unit, and Head of Safety Management and Eng. Unit, BGU
Abstract:
Grouping and ungrouping of particles/droplets in oscillating flows has ramifications to various industrial and natural two-phase flows, such as: fuel sprays, particulates emitted from engines, colloids in water, home-use aerosols, atmospheric aerosols and medical-related ones. The mathematical analysis of this phenomenon leads to the prediction of grouping tendency as a function of the parameters that play a role in the process. One of the applications is the design of an exhaust system for vehicle-engines that enhances particle grouping and coagulation and hence leading to the increase of particle size, while enabling efficient filtration, and to the reduction of risk associated with exposure to such sub-micron particles. The same concept may be utilized to filter Corona-related aerosols from the ambient air. Another possible engineering application is the increase of water filtration efficiency. The grouping concept has led to a method which removes particles from water with minimal coagulants/chemicals and reduced time compared with the conventional methods. In the medical area, combined flow and acoustic oscillations may be utilized to ungroup/breakup and remove secretions from the respiratory system. Projects involving these applications will be presented.
About the speaker:
Prof. Katoshevski graduated from Technion with degrees in Aerospace Engineering (BSc/MSc) and Applied Math (DSc). He had two post-doc periods, one at RWTH-Aachen, Germany (1995-1996) and the second one at Caltech, USA (1996-1998) in the field of Environmental Engineering. In 1998 he joined the newly established Environmental Engineering Unit at BGU. David deals with multi-component flow systems, CFD, air pollution control, filtration of nano-particles, and dynamics of inhaled/exhaled aerosols.
