Microgravity Science and Technology

, Volume 25, Issue 2, pp 127–139

Transient Effect of Micro Vibration from Two Space Vehicles on Mixture During Thermodiffusion Experiment

Original Article

DOI: 10.1007/s12217-013-9338-9

Cite this article as:
Ahadi, A. & Saghir, M.Z. Microgravity Sci. Technol. (2013) 25: 127. doi:10.1007/s12217-013-9338-9

Abstract

Numerical modeling of thermodiffusion experiment for a binary mixture of water and isopropanol under micro-vibrations condition is presented. The vibrations obtained onboard ISS and FOTON-M3 are due to different activities. The effect of micro-gravity vibration level on the variation of mixture properties were investigated in detail. In this paper, the thermodiffusion experiment was investigated for two different g-jitter vibrations in the presence of a thermal gradient. The cavity is filled with a binary mixture of water and isopropanol with negative Soret. All physical properties including density, mass diffusion and thermodiffusion coefficients were assumed as functions of temperature and concentration. In order to understand the behavior of the mixture during the course of the experiment, five locations in the domain were chosen. It was found that a similarity between g-jitter vibration and induced velocity pattern exist. Micro vibration was found to have a minimal effect on the molecular and thermodiffusion coefficients.

Keywords

Thermodiffusion Micro-gravity CFD simulation Binary mixture Transient study ISS 

Copyright information

© Springer Science+Business Media Dordrecht 2013

Authors and Affiliations

  1. 1.Mechanical Engineering DepartmentRyerson UniversityTorontoCanada

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