Evidence of collision-induced resuspension of microscopic particles from a monolayer deposit
Amir Banari, Christophe Henry, Rafael Henrique Fank Eidt, Pierre Lorenz, K. Zimmer, Uwe Hampel, Grégory Lecrivain
Abstract
Even after one century of research on particle resuspension the multiphysics mechanism for it remains unclear. In this Letter we show evidence for the inter-particle collision in a monolayer deposit with an intermediate surface coverage. Previously, the inter-particle collision was neglected in monolayer deposits and was considered only in multilayer beds due to lack of evidence. This experimental work indicates that particle cluster resuspension plays an important role in the early stage of resuspension. This explains the strong bimodal character of the resuspension curve, which shows the remaining particle fraction as a function of the flow velocity.