Publication

Heat slug propagation in QUELL. Part I: Experimental setup and 1-fluid GANDALF analysis

Claudio Marinucci
1999
Journal Articles

Abstract

The experimental setup for heat slug propagation at zero current and field in the QUench Experiment on Long Length (QUELL) is described and re-evaluated. Eight inductively heated and four resistively heated runs are considered and analyzed with the 1-fluid GANDALF model, which assumes perfect coupling between bundle and hole helium in the two-channel cable-in-conduit conductor (CICC). Although adequate to predict the hydraulic response, the 1-fluid model exhibits an intrinsic limitation to accurately simulate the evolution of the conduit temperature at different sensor locations during heat slug propagation. In general it appears that the analysis of this type of slow transients requires a 2-fluid model, as considered in Part II of the present study. (C) 1999 Elsevier Science Ltd. All rights reserved.

Official source

https://infoscience.epfl.ch/entities/publication/4260ae42-849b-496c-a20f-d1b2db9f832b

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Claudio Marinucci
1999
Journal Articles

Abstract

Official source

https://infoscience.epfl.ch/entities/publication/4260ae42-849b-496c-a20f-d1b2db9f832b

About this result

Related concepts (28)

Electrical conduit

An electrical conduit is a tube used to protect and route electrical wiring in a building or structure. Electrical conduit may be made of metal, plastic, fiber, or fired clay. Most conduit is rigid, but flexible conduit is used for some purposes. Conduit is generally installed by electricians at the site of installation of electrical equipment. Its use, form, and installation details are often specified by wiring regulations, such as the US National Electrical Code (NEC) and other building codes.

Newtonian fluid

A Newtonian fluid is a fluid in which the viscous stresses arising from its flow are at every point linearly correlated to the local strain rate — the rate of change of its deformation over time. Stresses are proportional to the rate of change of the fluid's velocity vector. A fluid is Newtonian only if the tensors that describe the viscous stress and the strain rate are related by a constant viscosity tensor that does not depend on the stress state and velocity of the flow.

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A non-Newtonian fluid is a fluid that does not follow Newton's law of viscosity, that is, it has variable viscosity dependent on stress. In non-Newtonian fluids, viscosity can change when under force to either more liquid or more solid. Ketchup, for example, becomes runnier when shaken and is thus a non-Newtonian fluid. Many salt solutions and molten polymers are , as are many commonly found substances such as custard, toothpaste, starch suspensions, corn starch, paint, blood, melted butter, and shampoo.

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Heat slug propagation in QUELL. Part I: Experimental setup and 1-fluid GANDALF analysis

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