Effects of clinorotation and positive dielectrophoresis on suspensions of heavy particles

Nikolai Markarian, Mike Yeksel, Boris Khusid, Anil Kumar, Padetha Tin

Research output: Contribution to journalArticlepeer-review

3 Scopus citations

Abstract

Experiments in both microgravity (aboard the NASA research aircraft KC-135) and ground-based environments were conducted in a clinostat (a channel slowly rotated around its horizontal axis to simulate "weightlessness") in which a dilute suspension of heavy, positively polarized spheres was exposed to a high-gradient strong ac electric field. While dielectrophoresis is shown to provide a powerful method for the manipulation and concentration of particles in clinostats, we find that clinorotation does not simulate the zero gravity morphology of the aggregation pattern due to an unexpectedly pronounced effect of a relatively weak, rotating gravity. This effect imposes certain limitations on the use of ground-based tests for predicting the operation of electrotechnologies for the control and manipulation of suspensions in microgravity.

Original languageEnglish (US)
Pages (from-to)1826-1829
Number of pages4
JournalPhysics of Fluids
Volume16
Issue number5
DOIs
StatePublished - May 2004

All Science Journal Classification (ASJC) codes

  • Computational Mechanics
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering
  • Fluid Flow and Transfer Processes

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