Molecular Tagging Velocimetry (MTV) and Its Automotive Applications

This work provides an overview of the technique of Molecular Tagging Ve-locimetry (MTV) and some of its automotive applications. The various ele-ments of MTV implementation are briefly described in terms of the available molecular tracers, methods of tagging, detection, and processing schemes. The automotive applications of this velocimetry technique are demonstrated in mapping the velocity field of the intake flow into a “steady flow rig ” model of an internal combustion engine and flow mapping of cycle-to-cycle variation in late compression of a motored IC engine. 1

Hydrodynamic Enhancement by Dynamic Filtration for Environmental Applications

International audienceIn this communication, we reviewed various dynamic filtration (DF) modules and their hydrodynamics and applications in wastewater treatment. Firstly, the configuration, operation parameter, and antifouling capacity for different dynamic filtration modules including rotating disk/rotor, rotating membrane, and vibratory systems were introduced. However, local hydrodynamics which could better diagnose the filtration performance were often neglected by the lack of knowledge on local measurement. To complete the knowledge on hydrodynamics, experiments were thus carried out by particle image velocimetry (PIV) technique. The velocity field and velocity profile were presented. Computational fluid dynamics (CFD) simulation was developed with the same working condition as PIV experiments and further discussed the velocity field. Moreover, the applications of dynamic filtration for water treatment were also evaluated. In the food processing wastewater treatment, dynamic filtration exhibited the high membrane permeability and excellent antifouling capacity at 12 times protein concentration process; afterwards most proteins in wastewater was recycled. This work provides guidance for the hydrodynamic mechanism and application in terms of dynamic filtration