FLUID SYSTEM ANGULAR-MOMENTUM AND MOMENT FLUCTUATIONS DRIVEN BY GRAVITY GRADIENT OR GRAVITY JITTER IN MICROGRAVITY

The dynamical behaviour of fluids affected by the asymmetric gravity g radient acceleration and gravity jitter acceleration, in particular th e effect of surface tension on partially-filled rotating fluids with s pecial example applicable to a full-scale Gravity Probe-B Spacecraft d ewar tank have been investigated. Results of slosh wave excitation alo ng liquid-vapor interface induced by gravity gradient acceleration ind icated that one-up one-down and one-down one-up oscillations of two bu bbles in the cross-section of doughnut profiles in the vertical r-z pl ane of rotating dewar, and an eccentric contour of bubble rotating aro und the axis of dewar in horizontal r-theta plane. Results of slosh wa ve excitation along liquid-vapor interface induced by gravity jitter a cceleration indicated equivalent to time-dependent oscillatory forces which push bubble in the combined bubble motion of down-and-up and lef tward-and-rightward as the bubble is rotating with respect to rotating dewar axis. Fluctuations of angular momentum, fluid moment and bubble mass center caused by slosh wave excitations driven by gravity gradie nt acceleration or gravity jitter acceleration are also investigated.