Effect of the Baffle on the Cryogenic Helium Container Viscous Stress and Moment Fluctuations in Microgravity

Hung, R. J.; Lee, C. C.

doi:10.1007/978-1-4615-2522-6_29

Cited by 1 publication

(2 citation statements)

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“…The decomposed components of (1';Y z, (1';y-o and (F.) in (x, y, z) directions become stress force (F x, Fy, F z). Detailed mathematical derivation and expression of (F x, Fy, F z) are shown in the paper given by Hung et al (1993).…”

Section: Figs 4(a) and 4(b)mentioning

confidence: 99%

“…The moment of stress force acting on the dewar wall of the container can be computed from the cross product of the moment arm (the perpendicular distance from the location of proof mass to the total forces) and the total forces. Again a detailed mathematical derivation and expression of the moment of the stress force (M x, My, M z) acting on the dewar wall of the spacecraft are shown in the paper given by Hung et al (1993).…”

Section: Figs 4(a) and 4(b)mentioning

confidence: 99%

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Gravity gradient or gravity jitter induced viscous stress and moment fluctuations in microgravity

Hung¹,

Pan²

1994

Fluid Dyn. Res.

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The dynamical behavior of fluids affected by the asymmetric gravity gradient and gravity jitter accelerations, in particular the effect of surface tension on partially-filled rotating fluids with a special example applicable to a full-scale Gravity Probe-B Spacecraft dewar tank, has been investigated. Results of slosh wave excitation along the liquid-vapor interface induced by gravity gradient acceleration indicated one-up one-down and one-down one-up oscillations of two bubbles in the cross-section of doughnut profiles in the vertical r-z plane of a rotating dewar, and an eccentric contour of a bubble rotating around the axis of the dewar in the horizontal r-i) plane. Results of slosh wave excitation along the liquid-vapor interface induced by gravity jitter acceleration showed an equivalent to the time-dependent oscillatory force which pushes a bubble in the combined bubble motion of down-and-up and leftward-and-rightward as the bubble is rotating with respect to a rotating dewar axis. Fluctuations of fluid stress forces, fluid stress moments, and moment arm of fluid moment exerted on the dewar wall of the container due to slosh wave excitations driven by gravity gradient acceleration or gravity jitter acceleration are also investigated.

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Section: Figs 4(a) and 4(b)mentioning

confidence: 99%

Section: Figs 4(a) and 4(b)mentioning

confidence: 99%