Conference paper

Publication year: 2006

Pages: 117-127

Journal: Microgravity Science and Technology

Volume number: 18

Issue number: 3-4

ISSN: 0938-0108

DOI Link: https://doi.org/10.1007/BF02870393

Conference: Biannual Symposium and General Assembly of the European-Low-Gravity-Research-Association (ELGRA)

Publisher: Springer

Abstract: 
The formation of a dynamic spiral string of particles with larger density than the fluid was investigated for time-dependent thermocapillary flow in liquid bridges under various gravity conditions including microgravity. The dynamic spiral string forms after approximately 20-60 oscillation periods from the homogeneous dilute particle suspension. It was found that the action of gravity is not decisive in the process of the particle accumulation structure (PAS) but gravity influences the flow, field for PAS-formation. We could realize and observe PAS with modal structure m = 3 under mu-g but modal structure m = 2 occurred only during a transient of the operating parameters in an aspect ratio-range different from that under normal gravity. The correlation of the optically observed PAS structure with the temperature structure of the azimuthally rotating hydrothermal wave on the free surface is the same under microgravity as under normal gravity indicating that PAS is a pure Marangoni effect.

Harvard Citation style: Schwabe, D., Tanaka, S., Mizev, A. and Kawamura, H. (2006) Particle accumulation structures in time-dependent thermocapillary flow in a liquid bridge under microgravity, Microgravity Science and Technology, 18(3-4), pp. 117-127. https://doi.org/10.1007/BF02870393

APA Citation style: Schwabe, D., Tanaka, S., Mizev, A., & Kawamura, H. (2006). Particle accumulation structures in time-dependent thermocapillary flow in a liquid bridge under microgravity. Microgravity Science and Technology. 18(3-4), 117-127. https://doi.org/10.1007/BF02870393