Local Lorentz force and ultrasound Doppler velocimetry in a vertical convection liquid metal flow

Autor:	Zürner, Till, Vogt, Tobias, Resagk, Christian, Eckert, Sven, Schumacher, Jörg
Rok vydání:	2017
Předmět:	Physics - Fluid Dynamics
Zdroj:	Exp. Fluids 59, 3 (2018)
Druh dokumentu:	Working Paper
DOI:	10.1007/s00348-017-2457-0
Popis:	We report velocity measurements in a vertical turbulent convection flow cell that is filled with the eutectic liquid metal alloy gallium-indium-tin by the use of local Lorentz force velocimetry (LLFV) and ultrasound Doppler velocimetry (UDV). We demonstrate the applicability of LLFV for a thermal convection flow and reproduce a linear dependence of the measured force in the range of micronewtons on the local flow velocity magnitude. Furthermore, the presented experiment is used to explore scaling laws of the global turbulent transport of heat and momentum in this low-Prandtl-number convection flow. Our results are found to be consistent with theoretical predictions and recent direct numerical simulations. Comment: 11 pages, 12 figures, 2 tables
Databáze:	arXiv
Externí odkaz:	http://arxiv.org/abs/1711.01837 Zobrazit plný text záznamu View this record from Arxiv