Interaction Between a Spherical Particle and Wall -Bounded Flows at Finite Reynolds Number

Thirdly, we investigate the interaction of a finite-sized particle embedded in a turbulent channel flow. Particles of various sizes have been located at two specific wall-normal locations, the buffer region and the channel center. Near-wall region mechanisms are observed consisting of such different events as bursting, sweep, and ejection, whereas channel center can be considered as nearly isotropic turbulence. We compare the computed forces with the standard force formulations and analyze possible mechanisms for their deviations. Further, we analyze the back effects that the particle imposes on the turbulence field---in particular, the wake responses to the ambient turbulence and the turbulence modulation by the particle for the energy and wall shear stress.

Name thesis:degree_name

Ph.D.

Level thesis:degree_level

Dissertation

Discipline thesis:degree_discipline

Theoretical and Applied Mechanics

Grantor

University of Illinois at Urbana-Champaign

Year dc:date

2015

Author dc:creator

• Zeng, Lanying

Contributors dc:contributor

• Balachandar, S.

• Physics, Fluid and Plasma

Language dc:language

eng

Identifier

(MiAaPQ)AAI3270066

OAI identifier oai:identifier

oai:www.ideals.illinois.edu:2142/87744