Abstract
Main task of diffusion experiments in liquids is to avoid additional transport induced by convection. Even under microgravity conditions aboard a space vehicle, diffusion measurements can be disturbed. Additional transport due to residual accelerations and vibrations can only be analysed under low gravity conditions. For the 28th ESA Parabolic flight campaign (May 2000), modified for the 31st ESA Parabolic flight campaign (October 2001) and for the 34th ESA Parabolic flight campaign (April 2003), a model experiment using water as liquid was developed. Because of the short term of a parabola, the analogy between diffusive mass transport and the faster heat transport was used. The angle between the 4mm or 10mm thin capillary and the direction of acceleration ranged between 0∘ and 90∘. For an oscillation amplitude of 100mm, the increase of the frequency up to 1 Hz led to a slight increase of the additional transport. Experiments with 1.7 Hz showed an additional transport of maximum 50%. An effect of the angle between the capillary and the acceleration vector was in the order of the error.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
