Visualisation of the large scale circulation in Rayleigh-Bénard convection using contactless inductive flow tomography

9th International Symposium on Electromagnetic Processing of Materials

材料科学;物理学

Wondrak, T.^1 ; Stefani, F.^1 ; Galindo, V.^1 ; Eckert, S.^1

Helmholtz-Zentrum Dresden - Rossendorf, Bautzner Landstraße 400, Dresden, Germany^1

关键词: Flow measurement techniques;    Inductive flow tomography;    Large-scale circulation;    Metallurgical applications;    Rayleigh;    Rayleigh number;    Sensor arrangements;    Three-dimensional reconstruction;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/424/1/012007/pdf
DOI  :  10.1088/1757-899X/424/1/012007

学科分类：材料科学（综合）

来源: IOP

【 摘 要 】

Rayleigh-Bénard (RB) convection plays an important role in geo- and astrophysics as well as in many metallurgical applications. At sufficiently high values of the Rayleigh number, a large scale circulation (LSC) is formed whose dynamics had turned out to be surprisingly rich. In this paper, the applicability of the contactless inductive flow tomography (CIFT) for the detection of the torsional mode of the LSC is investigated. CIFT enables the three-dimensional reconstruction of flow structures in liquid metals by applying one or more magnetic fields and measuring the flow induced perturbations of those fields outside the melt. Additionally, preliminary measurements of the flow induced magnetic field with a similar sensor arrangement will be presented.