２１世紀の乱流研究

抄録

Turbulence is an eternal target of fluid mechanics. In the end of 20th century, numerical study of turbulence was initiated. The famous milestone was Stanford Conference held in 1980-1981. In 21th century, the popularization of turbulence calculation has occurred because of spreading of low coat but high performance PC and CFD tools in which turbulence models are implemented. Turbulence of functional fluids has attracting much interest because of its utility in engineering applications. Among them turbulence including microbubbles has a lot of physically unique properties. Recently Kolmogorov's inertial subrange needs reconsideration on its existence condition and ubiquitousness. Finally, the applicability of the probability theory is addressed. In spite of the fact that turbulence is probabilistic phenomena, the application of probability theory has not been made much progress these decades. However this way of study is most likely to proceed with cutting edge technologies of measurement and advanced mathematics.