Finite-size spherical particles in a square duct flow of an elastoviscoplastic fluid: an experimenta

Zade, S., Shamu, J., Lundell, F. and Brandt, L. (2020) Finite-size spherical particles in a square duct flow of an elastoviscoplastic fluid: an experimental study. Journal of Fluid Mechanics 883, January 2020: A6.  (External link)

The present experimental study addresses the flow of a yield stress fluid with some elasticity (Carbopol gel) in a square duct. The behaviour of two fluids with lower and higher yield stress is investigated in terms of the friction factor and flow velocities at multiple Reynolds numbers and, hence, Bingham numbers. Taking advantage of the symmetry planes in a square duct, we reconstruct the entire 3-component velocity field from two-dimensional particle image velocimetry (PIV).