Mutual-friction coefficients in two-dimensional superfluids: From the Gross-Pitaevskii equation to the Hall-Vinen-Bekharevich-Khalatnikov two-fluid model

Shukla, V and Brachet, M and Gupta, A and Pandit, R (2015) Mutual-friction coefficients in two-dimensional superfluids: From the Gross-Pitaevskii equation to the Hall-Vinen-Bekharevich-Khalatnikov two-fluid model. In: 15th European Turbulence Conference, ETC 2015, 25-28 August 2015, Delf; Netherlands.

PDF PRO_EUR_TUR_CON_2015.pdf - Published Version Restricted to Registered users only Download (327kB) | Request a copy

Abstract

We start from the two-dimensional Gross-Pitaevskii equation (GPE) and develop algorithms for the ab-initio determination of the temperature (T) dependence of the mutual-friction coefficients, α and α�, and the normal-fluid density �n, which appear as parameters in the Hall-Vinen-Bekharevich-Khalatnikov (HVBK) two-fluid model for a superfluid. In the second part of our study, we elucidate the statistical properties of two-dimensional, homogeneous, isotropic superfluid turbulence in the simplified HVBK model, with values for the mutual-friction coefficients that are comparable to those we obtain from the first part of our study. © TU Delft.

Item Type:	Conference Paper
Publication:	Proceedings - 15th European Turbulence Conference, ETC 2015
Publisher:	TU Delft
Additional Information:	cited By 0; Conference of 15th European Turbulence Conference, ETC 2015 ; Conference Date: 25 August 2015 Through 28 August 2015; Conference Code:157595
Keywords:	Bose-Einstein condensation; Turbulence; Two phase flow, Ab initio; Gross-Pitaevskii equation; Mutual friction; Normal fluids; Statistical properties; Superfluid turbulence; Two fluid model, Friction
Department/Centre:	Division of Physical & Mathematical Sciences > Physics
Date Deposited:	12 Oct 2020 06:40
Last Modified:	12 Oct 2020 06:40
URI:	http://eprints.iisc.ac.in/id/eprint/65903

Actions (login required)

View Item