A wellhead multistage bundle gas–liquid separator combining a cylindrical cyclone (GLCC) with multi-tube components is expected to improve the separation performance. However, there no unified understanding of factors influencing performance separator. The continuous improvement and applications are restricted. This paper evaluated using numerical simulation method. results indicate that flow f...

Using results from sheaf theory combined with the phenomenological theory of the two-dimensional superfluid, the precipitation of quantum vortices is shown to be the genesis of a macroscopic order parameter for a phase transition in two dimensions.

The Bogoliubov procedure in quantum field theory is used to describe a relativistic almost ideal Bose gas at zero temperature. Special attention is given to the study of a vortex. The radius of the vortex in the field description is compared to that obtained in the relativistic fluid approximation. The Kelvin waves are studied and, for long wavelengths, the dispersion relation is obtained by an...

Abstract Andreev scattering of thermal excitations is a powerful tool for studying quantized vortices and turbulence in superfluid 3He-B at very low temperatures. We write Hamilton’s equations for a quasiparticle in the presence of a vortex line, determine its trajectory, and find under wich conditions it is Andreev reflected. To make contact with experiments, we generalize our results to the O...

We propose a setup with ultracold atomic gases that can be used to make a nonrelativistic superstring in four spacetime dimensions. In particular, we consider for the creation of the superstring a fermionic atomic gas that is trapped in the core of a vortex in a Bose-Einstein condensate. We explain the required tuning of experimental parameters to achieve supersymmetry between the fermionic ato...

Recently, methods of approximations by particles systems have been widely studied. For an incompressible, inviscid, two dimensional fluid a natural approximating scheme follows the point vortex method. The basic idea of the point vortex method is to approximate the vorticity of a fluid by a “gas of vortices” which is represented by a linear combination of dirac measures ∑ Riδxi . The investigat...

The mechanism of magnetic vortex motion in the classical easy-plane antiferromagnet and the vortex gas contribution to the response functions of such magnets are considered for temperatures above the K08teritz-Thouless transition. Unlike a ferromagnet, gyrotropical properties of such vortices arise only in sufficiently strong transversal magnetic field. Because of that, the magnetic field produ...