Output details

Motion of a spherical solid particle in thermal counterflow turbulence

This was the first computation of particle-superfluid vortex collisions in a self-consistent way, a phenomenon that had previously only been studied experimentally. The results expounded the effect of superfluid-vortex stratification, and the formation of a vortex tail behind the particle when stratification was strong. Never before has it been possible (in superfluids) to compare directly velocity measurement data with theoretical predictions from first principles. It was achieved here, and the excellent agreement with experiment [Zhang and Van Sciver, J. Low Temp. Phys. 138, 865 (2005)] was instrumental in the justification of the employed PIV methods [Phys. Fluids 23, 107102 (2011)].