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Discontinuous Pore Fluid Distribution under Microgravity—KC-135 Flight Investigations

^a Dep. of Civil Engineering, 2118 Fiedler Hall, Kansas State Univ., Manhattan, KS 66506
^b Universities Space Research Association, NASA Johnson Space Center, Houston, TX 77058

View larger version (109K): [in a new window]   Fig. 1. Equipment used to establish Hexadecane residual saturation and to freeze and contain samples during flight. Left: Liquid nitrogen vapor shipper used to quickly freeze samples during KC135 flight (about 15 s). Right: Suction system to establish residual saturation of Hexadecane in capsule.

View larger version (18K): [in a new window]   Fig. 2. The trajectory of the KC135 aircraft showing a typical 0-g maneuver. Each parabola consists of a 0-g period of approximately 25 s and 1.8-g period of approximately 40 to 60 s.

View larger version (15K): [in a new window]   Fig. 3. Representative accelerometer profile of KC-135 flight. Unit for y axis is g(t)/g(1) where g(t) is acceleration of gravity at time t and g(1) equals acceleration of gravity on Earth (1 g).

View larger version (20K): [in a new window]   Fig. 4. Cumulative blob size distributions from Day 4 experiments of KC-135 flight.

View larger version (54K): [in a new window]   Fig. 5. Volume increase of glass beads sample under microgravity aboard KC-135 flight. (a) Comparison of samples of Day-2 experiments; (b) Comparison of samples of Day-3 experiments under 1.8 and 0 g.

View larger version (16K): [in a new window]   Fig. 6. Illustration of particle separation during microgravity while glass beads are bound by Hexadecane. (a) Glass beads configuration with Hexadecane ganglia before microgravity; (b) Glass beads configuration with Hexadecane ganglia during and after microgravity.