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Effect of Vibration on Transport Experiments - Model Experiments during Parabolic Flights

Mathiak, Gerhard and Sies, Wolfram and Weiß, Sebastian and Willnecker, Rainer and Odabasi, Ziya and Plescher, Engelbert (2005) Effect of Vibration on Transport Experiments - Model Experiments during Parabolic Flights. ELGRA Biennial Meeting and General Assembly, 2005-09-21 - 2005-09-23, Santorini (Greece). (Unpublished)

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Diffusion and convection are the main physical processes in crystal growth and metallurgy. On ground, the measured diffusion coefficients of liquids are often enlarged due to the additional mass transport of the natural convection especially at high temperatures. In microgravity, g-jitter and residual acceleration can easily disturb the measurement. The influence of vibrations on liquid transport experiments was investigated quantitatively in a model heat transport experiment using hot and warm water during three ESA parabolic campaigns. A reflight with a further developed experimental set-up was performed during ESA PFC 39 in March 2005. The goal was to minimize the transport induced by the starting of the experiment. Two different methods to start the experiments were used: the shear cell method and the flowing junction cell method. The cells with a 4mm and 10mm thin capillary were fixed on an oscillating platform in three different positions: with an angle of 0°, 45° and 90° between the capillary axis and the acceleration vector.

Item URL in elib:https://elib.dlr.de/20914/
Document Type:Conference or Workshop Item (Speech)
Title:Effect of Vibration on Transport Experiments - Model Experiments during Parabolic Flights
AuthorsInstitution or Email of AuthorsAuthor's ORCID iD
Odabasi, ZiyaFH AachenUNSPECIFIED
Plescher, EngelbertFH AachenUNSPECIFIED
Open Access:No
Gold Open Access:No
In ISI Web of Science:No
Keywords:Diffusion, Thermal Conductivity, Microgravity, Parabolic Flight
Event Title:ELGRA Biennial Meeting and General Assembly
Event Location:Santorini (Greece)
Event Type:international Conference
Event Dates:2005-09-21 - 2005-09-23
HGF - Research field:Aeronautics, Space and Transport (old)
HGF - Program:Space (old)
HGF - Program Themes:W FR - Forschung unter Weltraumbedingungen (old)
DLR - Research area:Space
DLR - Program:W FR - Forschung unter Weltraumbedingungen
DLR - Research theme (Project):W - Vorhaben Materialforschung unter Mikro-g (old)
Location: Köln-Porz
Institutes and Institutions:Institute of Materials Physics in Space > Institute of Space Simulation > Center for Solidification of Undercooled Melts (ZEUS)
Deposited By: Mathiak, Dr.-Ing. Gerhard
Deposited On:03 Jan 2006
Last Modified:27 Apr 2009 04:50

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