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Microgravity Fluid Physics & Heat Transfer

ISBN Print: 978-1-56700-147-1

ISBN Online: 978-1-56700-444-1

FORCED PISTON EFFECT EXPERIMENTS UNDER 1g AND μg AT VARIOUS DENSITIES AROUND THE CRITICAL POINT OF SF6

Abstract

To further investigate the piston effect under 1g and microgravity we have developed a new test cell with a variable volume for a density range of ±35% around the critical density of SF6 (Tc = 318.717 K, Pc = 3.7545 MPa, ρc = 742 kg/m3, Wyczalkowska and Sengers) to enable a systematic determination of the isentropic dynamic temperature propagation. This cell is inserted in a precise thermostat used in the French ALICE II facility. Results of various forced piston effect experiments at different densities and temperatures are presented. A temperature undershoot is observed and an explanation given.
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