Lagrangian particle tracking and Direct Numerical Simulation of turbulence are used to highlight an intermittent phenomenon which is relevant for particle resuspension dynamics in an unbaffled tank reactor stirred by an eight blade paddle impeller. This phenomenon is associated with the Ekman pumping effect and its frequency scales in terms of the impeller rotation speed. We examine the dispersion of three swarms of heavy particles of different diameter demonstrating qualitative and quantitative features of the resuspension phenomenon.
Lavezzo, V., Verzicco, R., Soldati, A. (2009). Ekman pumping and intermittent particle resuspension in a stirred tank reactor. CHEMICAL ENGINEERING RESEARCH & DESIGN, 87(4), 557-564 [doi:10.1016/j.cherd.2009.01.004].
Ekman pumping and intermittent particle resuspension in a stirred tank reactor
VERZICCO, ROBERTO;
2009-01-01
Abstract
Lagrangian particle tracking and Direct Numerical Simulation of turbulence are used to highlight an intermittent phenomenon which is relevant for particle resuspension dynamics in an unbaffled tank reactor stirred by an eight blade paddle impeller. This phenomenon is associated with the Ekman pumping effect and its frequency scales in terms of the impeller rotation speed. We examine the dispersion of three swarms of heavy particles of different diameter demonstrating qualitative and quantitative features of the resuspension phenomenon.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
