Congratulations to CAMPhyRE student Cairen Miranda on publishing "Importance of preferential segregation by aerodynamics in dust rig tests" in the ASME Journal of Fluids Engineering! This work studies a particle injection rig to understand how its design affects particles impingement and rebound from a target plate. The major result concerns how particles respond differently to changes in the flow field based on their diameter. Near the plate, small particles follow the flow streamlines which causes them to both significantly slow down and to disperse in all directions. However, large particles move ballistically, so they impact the plate with nearly the same velocity and orientation they had at the duct exit. (Reynolds Averaged Navier-Stokes) RANS simulations are compared to (Large Eddy Simulations) LES. While RANS are capable of predicting mean particle impact statistics, they display narrower statistical variation than LES, suggesting that particle dispersion is underpredicted in RANS.
The full article can be seen at ASME J. Fluids Engineering, Vol 145, Issue 10 at doi.org/10.1115/1.4062716
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