microparticle

SIMULATION AND RESEARCH OF THE SEPARATION OF TWO TYPES OF SUSPENDED PARTICLES IN A DISPERSED MIXTURE UNDER THE INFLUENCE OF AN ACOUSTIC FIELD

A mathematical model of the process of separating suspended microparticles in a dispersed mixture within a 2-branched channel of a microfluidic lab-chip under the influence of an acoustic field has been developed. The model is implemented in the environment of COMSOL Multiphysics, using thermoviscous acoustics, creeping flow, particle tracking in a fluid flow, and fluid-particle interaction multiphysics interfaces.

Modeling a signal generated by microparticles moving in the aerodynamic flow

The article presents a model of a signal generated by microparticles moving in an aerodynamic flow.  This model is based on the Lorentz–Mie scattering theory.  It is shown that the visibility and the signal/noise ratio of the Doppler signal are determined by the degree of amplitude and polarization matching of the scattered waves.  These parameters also depend on the degree of phase matching of "elementary" Doppler signals.  Using this signal model, it is possible to calculate the shape of the aperture of the receiving optics for a specific type of laser Doppler anemometer.  The use of such