Shear-induced back transport

Eor a given crossflow filtration, the dominant particle back transport mechanism may depend on the shear rate and the particles size [4]. Brownian diffusion is only important for particles smaller than only a few tenths of a micron in diameter with relative low shear, whereas inertial lift is important for particles larger than several tens of microns with higher shear rates. Shear-induced back transport appears to be important for intermediate particle sizes and shear rates. Li et al. [7] reported that the shear-induced mechanism was able to predict fluxes comparable with the critical fluxes identified by the DOTM. 

A feature of cross flow, whether pumped, stirred, or bubbled, is that flux-convected deposition is mitigated by shear-induced back transport. In principle, for a given feed and cross-flow hydrodynamics, a flux can be identified at which convection and back... 

---