The motion of passive admixture of spherical particles in the stationary hydrodynamic field of a swirling flow is studied. A spherical particle of a given mass in the hydrodynamic field of a swirling flow is located on a certain circular orbit. where the centrifugal force is compensated by the radial drag force due to the sink. This leads to the separation of the host fluid and admixt... https://www.espumasyterciopelo.com/product-category/balloons-airloonz/