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Fully resolved simulations of fibers with a significant size in turbulent flows
In this project, the turbulent flow is modeled by an entropy lattice Boltzmann method. Direct contact and lubrication force models for fiber-fiber interactions and fiber-wall interaction are taken into account to allow for a full four-way interaction. The figure shows a visualisation of the fibers in a turbulent channel flow (Re_\tau=180) with the fibers shown as the yellow rods. Turbulent eddies are visualized by showing iso-surfaces of the second invariant of the velocity gradients, marking out regions of high vortical motion.
• Do-Quang, M., Amberg, G., Brethouwer, G., Johansson, A. (2014) "Simulation of finite-size fibres in turbulent channel flow", Physical Review E, 89, 013006 .