论文标题
气泡流中的混乱和湍流
Chaos and turbulence in bubbly flows
论文作者
论文摘要
已经使用了直接数值模拟和实验室实验的结果，以表明浮力驱动的在高气容量分数下的起泡流动是由液体动能的典型指数频谱混合在一起的，而在中等和小的气体体积分数中，它是一个分布式的混乱（螺旋）或三分之一的分布，是由三分之一的分布式分布和三分之一的分布。动能的指数光谱。从这个角度，还讨论了气泡与各向同性（活跃网格后面）和近壁湍流的相互作用，并应用于加压水核反应堆。
Results of direct numerical simulations and laboratory experiments have been used in order to show that the buoyancy driven bubbly flows at high gas volume fraction are mixed by deterministic chaos with typical exponential spectrum of the liquid kinetic energy, whereas at moderate and small gas volume fraction it is a distributed chaos (turbulence or pseudo-turbulence) dominated by the third and second moments of helicity distribution with the stretched exponential spectra of the kinetic energy. Interaction of the bubbles with isotropic (behind an active grid) and near-wall turbulent flows has been also discussed from this point of view with an application to the pressurized water nuclear reactors.
