two-fluid model

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two-fluid model

[′tü‚flü·əd ‚mäd·əl]
(cryogenics)
A theoretical model of helium II which assumes that it consists of two interpenetrating components, a normal fluid and a superfluid with zero entropy, viscosity, and thermal conductivity.
References in periodicals archive ?
In the following sections the drift flux model and the two fluid model are explained.
In a two fluid model, a set of conservative equations is used for each fluid (phase).
Some authors assume isothermal analysis [51], [46], [52] or adiabatic conditions [50] from the wall of the pipe, other authors used only one mixture energy conservative equation in spite of develop an hydraulic two fluid model [54].
In addition to the equation system, the solution of a two fluid model is harder to found than the one of the drift flux model because there are more coupled equations.
A numerical analysis of the two fluid model near ill posedness was made by [57].
Accounting for non-equilibrium turbulent fluctuations in the Eulerian two fluid model by means of the notion of induction period.
The main advantage of the Unified Two Fluid Model is its ability to predict the onset of condensation and the propagation of liquids through the pipe.
1 (a) Two fluid model for the bulk impedance of a superconductor and (b) a corresponding equivalent surface impedance of a superconductor.