Experimental investigation of liquid-metal flows through a sudden expansion at fusion-relevant Hartmann numbers

Bühler, L.; Horanyi, S.; Arbogast, E.

doi:10.1016/j.fusengdes.2007.02.029

Cited by 41 publications

(24 citation statements)

References 4 publications

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“…This pressure drop is indicated in the figure as p 3D since it is caused by 3D MHD effects due to velocity redistribution and extra current flow. In general p 3D for creeping flows depends on the Hartmann number and its viscous fraction is found to decrease as p 3D,v ∼ Ha −1/2 as Ha → ∞ [6]. For the present case the additional 3D pressure drop is p 3D = 0.45.…”

Section: Pressure Drop and Flow Distribution At High Hamentioning

confidence: 52%

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Numerical investigation of liquid metal flows in rectangular sudden expansions

Mistrangelo

Bühler

2007

Fusion Engineering and Design

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Section: Pressure Drop and Flow Distribution At High Hamentioning

confidence: 52%

“…The geometry is chosen according to the features of the experimental test section used in the MEKKA laboratory of the Forschungszentrum Karlsruhe [6]. The expansion ratio is equal to 4 and the wall conductance parameter used here is c = 0.1.…”

Section: Resultsmentioning

confidence: 99%

Numerical investigation of liquid metal flows in rectangular sudden expansions

Mistrangelo

Bühler

2007

Fusion Engineering and Design

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“…It is useful to have benchmark problems of this type too. As possible candidates for benchmarks of this type one can consider experiments on laminar MHD flows in a Mock-Up of HCLL blanket [32] or experimental studies of MHD flows in a sudden expansion [33]. However, taking into account a significant number of already proposed benchmarks, we recommend these two problems to be considered as a next step providing that problems A-D are accomplished.…”

Section: Other Code Testingmentioning

confidence: 99%

An approach to verification and validation of MHD codes for fusion applications

Smolentsev

Badia

Bhattacharyay

et al. 2015

Fusion Engineering and Design

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We propose a new activity on verification and validation (V&V) of MHD codes presently employed by the fusion community as a predictive capability tool for liquid metal cooling applications, such as liquid metal blankets. The important steps in the development of MHD codes starting from the 1970s are outlined first and then basic MHD codes, which are currently in use by designers of liquid breeder blankets, are reviewed. A benchmark database of five problems has been proposed to cover a wide range of MHD flows from laminar fully developed to turbulent flows, which are of interest for fusion applications: (A) 2D fully developed laminar steady MHD flow, (B) 3D laminar, steady developing MHD flow in a non-uniform magnetic field, (C) quasitwo-dimensional MHD turbulent flow, (D) 3D turbulent MHD flow, and (E) MHD flow with heat transfer (buoyant convection). Finally, we introduce important details of the proposed activities, such as basic V&V rules and schedule. The main goal of the present paper is to help in establishing an efficient V&V framework and to initiate benchmarking among interested parties. The comparison results computed by the codes against analytical solutions and trusted experimental and numerical data as well as code-to-code comparisons will be presented and analyzed in companion paper/papers.

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“…Many authors, e.g. Bühler et al [19], who studied the magnetohydrodynamic (MHD) effects of LM in a sudden expansion and Guo et al [20] or Biswas et al [21], have extensively studied and modelled these types of geometries. In addition, sudden expansion backward facing step (BFS) is a widely used benchmark problem for CFD validating purposes, so the vortices in these systems are well known structures.…”

Section: Hydrogen Transport Analysis In a Lle Flowing Through A Suddementioning

confidence: 99%

The effect of a micro bubble dispersed gas phase on hydrogen isotope transport in liquid metals under nuclear irradiation

Fradera

Cuesta‐López

2013

Fusion Engineering and Design

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The present work intend to be a first step towards the understanding and quantification of the hydrogen isotope complex phenomena in liquid metals for nuclear technology. Liquid metals under nuclear irradiation in ,e.g., breeding blankets of a nuclear fusion reactor would generate tritium which is to be extracted and recirculated as fuel. At the same time that tritium is bred, helium is also generated and may precipitate in the form of nano bubbles. Other liquid metal systems of a nuclear reactor involve hydrogen isotope absorption processes, e.g., tritium extraction system. Hence, hydrogen isotope absorption into gas bubbles modelling and control may have a capital importance regarding design, operation and safety.Here general models for hydrogen isotopes transport in liquid metal and absorption into gas phase, that do not depend on the mass transfer limiting regime, are exposed and implemented in OpenFOAM R CFD tool for 0D to 3D simulations. Results for a 0D case show the impact of a He dispersed phase of nano bubbles on hydrogen isotopes inventory at different temperatures as well as the inventory evolution during a He nucleation event. In addition, 1D and 2D axisymmetric cases are exposed showing the effect of a He dispersed gas phase on hydrogen isotope permeation through a lithium lead eutectic alloy and the effect of vortical structures on hydrogen isotope transport at a backward facing step.Exposed results give a valuable insight on current nuclear technology regarding the importance of controlling hydrogen isotope transport and its interactions with nucleation event through gas absorption processes.

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Experimental investigation of liquid-metal flows through a sudden expansion at fusion-relevant Hartmann numbers

Cited by 41 publications

References 4 publications

Numerical investigation of liquid metal flows in rectangular sudden expansions

Numerical investigation of liquid metal flows in rectangular sudden expansions

An approach to verification and validation of MHD codes for fusion applications

The effect of a micro bubble dispersed gas phase on hydrogen isotope transport in liquid metals under nuclear irradiation

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