Properties of nanoparticles affecting simulation of fibrous gas filter performance

摘要: Computational Fluid Dynamics (CFD) codes allow detailed simulation of the flow gases through fibrous filter media. When pattern gas between fibers has been established, simulated particles any desired size can be "injected" into entering stream, and their paths under influence aerodynamic drag, Brownian motion electrostatic forces tracked. Particles either collide with a fiber, or pass entire medium. They may bounce off fiber surface, adhere firmly to surface previously captured. Simulated injection many at random locations in stream allows average probability capture calculated. Many particle properties must available as parameters for equations defining on moment contact after contact. Accurate values all are needed, not only predicting actual service, but also validate models media geometries computational procedures used CFD. We present survey existing literature influencing nanoparticle dynamics adhesion.