Abstract
To investigate the collective behavior of solid particles in the particle-induced turbulence, a direct numerical simulation of homogeneous flow including a lot of settling particles was conducted. The flow around each particle was fully resolved by the finite-difference method. A particle was assumed to be rigid and spherical. The number of solid particles was up to 2048 and the number of grid for fluid flow was 268 millions. Particles moving with Reynolds number 300 formed clusters (high-concentration regions) due to wake-attractions. Influences of the loading ratio and particle rotation were particularly investigated. The rotation drastically affected numerical results. Irrotational particles were absorbed into clusters but rotational ones escaped. Such difference was caused by reverse direction of lift in the shear flows. Moreover, it was found that the particle-induced turbulence became severalfold of the total of disturbance by vortex shedding from each particle when particles formed clusters.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
