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Published on: December 24, 2013
Mapping outcomes of liquid marble collisions.
Thomas C Draper1, Claire Fullarton, Richard Mayne
1Unconventional Computing Laboratory, University of the West of England, Bristol, BS16 1QY, UK. Andrew.Adamatzky@uwe.ac.uk.
This study explores liquid marble (LM) collisions, finding specific parameters for controlled coalescence. Understanding these parameters is key for advancing microfluidics and related technologies.
Area of Science:
- Fluid Dynamics
- Materials Science
- Microfluidics
Background:
- Liquid marbles (LMs) are essential in microfluidics, microreactors, bioreactors, and computing.
- Controlling LM coalescence is critical for these applications.
- Previous studies focused on mobile-mobile or mobile-sessile LM collisions.
Purpose of the Study:
- Investigate mobile LM impact on static, non-supported LMs.
- Determine collision parameters for controlled coalescence.
- Analyze LM deformation and its relation to collision outcomes.
Main Methods:
- Utilized high-speed videography for single-frame analysis.
- Conducted multiple collisions varying modified Weber number (We*) and offset ratio (X*).
- Examined effects of LM volume and powder grain size on collision outcomes.
Main Results:
- Coalescence occurred at ~50% for 1.0 < We* < 1.4 and 0.0 < X* < 0.1.
- 100% non-coalescence observed for X* > 0.25, and We* < 0.95 or We* > 1.55.
- A novel LM deformation was observed above 0.6 m s-1, linked to volume and grain size.
Conclusions:
- Established key parameters (We*, X*) influencing LM collision outcomes.
- Demonstrated control over LM coalescence for future experimental designs.
- Provided insights into LM behavior and deformation during impact.
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