Turbulent Transport of He II in Active and Passive Phase Separators Using Slit Devices and Porous Media

Yuan, Shandong; Lee, J. M.; Frederking, T. H. K.

doi:10.1007/978-1-4613-9874-5_53

Cited by 3 publications

(2 citation statements)

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“…24 It has been known for some time that the transition from linear flow to chaos is quite complex, as shown by Tough 28 for ZNMF. The recent nonlinear VLPS regime of the slit device has been described 23 x(p,ST) 3 S(p,/p m )(tiJp)drt (29) (where T u = T d + AJ). The related mass-flux density j 0 (=mass flow rate m divided by the total plug cross section) is Jo = (30) It has been recognized for a considerable time that mutual friction in porous media and fine ducts is altered significantly, in particular for fine pores.…”

Section: Nonlinear Vlps Regimementioning

confidence: 99%

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Space cryogenics components based on the thermomechanical effect - Vapor-liquid phase separation

Yuan¹,

Frederking

1989

Journal of Thermophysics and Heat Transfer

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Applications of the thermomechanical effect has been qualified including incorporation in large-scale space systems in the area of vapor-liquid phase separation (VLPS). The theory of the porous-plug phase separator is developed for the limit of a high thermal impedance of the solid-state grains. Extensions of the theory of nonlinear turbulent flow are presented based on experimental results. Nomenclature= length in rate constant equation = cross-sectional area = diameter = VLPS factor [ 1 + ST/X\ ~l = gravitational acceleration = mass flux density (/, with i = n,s) = rate constant for normal fluid convection = thickness of plug = characteristic length K 1/2 = mass flow rate = pressure = thermomechanical pressure = heat flux density = heat flow rate = radial position coordinate = radius of tube = slit width = entropy per unit mass = time = temperature = velocity (vj with j = n,s) --relative velocity (v n -v s ) = position coordinate = shear viscosity = permeability = latent heat of vaporization = chemical potential = density = wave function = apparent = downstream = effective = normal fluid = superficial value = superfluid = superfluid, critical = upstream = vapor-liquid phase separation = zero net mass flow = bulk

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Section: Nonlinear Vlps Regimementioning

confidence: 99%

“…20 and subsequent VLPS work. 23 In the latter reference, it has been possible to show that the slit device is subject to limitations similar to those of the porous plug. The apparently "linear regime" of the VLPS slit has been identified as an analog of ZNMF conditions in the nonlinear regime in wide ducts.…”

Section: Introductionmentioning

confidence: 96%