Transition to turbulence and drag reduction in particle-laden pipe flows
N. Agrawal, Transition to Turbulence and Drag Reduction in Particle-Laden Pipe Flows, Institute of Science and Technology Austria, 2021.

Transition to turbulence in particle laden flows
N. Agrawal, G.H. Choueiri, B. Hof, Physical Review Letters 122 (2019).