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http://dx.doi.org/10.6112/kscfe.2016.21.4.046

BEHAVIOR OF MICROBUBBLES IN ISOTROPIC TURBULENCE  

Shim, G.H. (Dept. of Mechanical Engineering, Yonsei Univ.)
Lee, S.G. (Dept. of Mechanical Engineering, Yonsei Univ.)
Lee, C. (Dept. of Mechanical Engineering, Yonsei Univ.)
Publication Information
Journal of computational fluids engineering / v.21, no.4, 2016 , pp. 46-53 More about this Journal
Abstract
Direct numerical simulation is conducted to observe the behavior of microbubbles in isotropic turbulence. Navier-Stokes equation and the motion of equation for microbubbles are solved with periodic boundary condition in a cube domain. Vorticity contour, enstrophy ratio, relative reduction of bubble rise velocity, and the closest distance of particles are investigated for various Stokes numbers and gravity factors to understand clustering of microbubbles. Also, clustering due to the effect of the lift force is investigated.
Keywords
Isotropic Turbulence; Microbubble; Clustering; Stokes Number; Buoyancy number W; Lift Force;
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