• Volume/Page
  • Keyword
  • DOI
  • Citation
  • Advanced
   
 
 
 

You are not logged in You are logged out of this journal. Log In

Journal of the Acoustical Society of America / Volume 131 / Issue 2 / NONLINEAR ACOUSTICS [25]

Contactless transport of matter in the first five resonance modes of a line-focused acoustic manipulator a

a Portions of this work were presented in “Simultaneous contactless levitation and transport of matter in the third resonance mode of a line-focused acoustic manipulator,” 161st ASA Meeting, Seattle, WA, May 2011.

J. Acoust. Soc. Am. Volume 131, Issue 2, pp. 1029-1038 (2012); (10 pages)

Daniele Foresti, Majid Nabavi, and Dimos Poulikakos

Department of Mechanical and Process Engineering, Institute of Energy Technology, Laboratory of Thermodynamics in Emerging Technologies, ETH Zurich, CH-8092, Zurich, Switzerland

Full Text: Read Online (HTML) | Download PDF | Buy PDF (US$30) | View Cart
The first five resonance modes for transport of matter in a line-focused acoustic levitation system are investigated. Contactless transport was achieved by varying the height between the radiating plate and the reflector. Transport and levitation of droplets in particular involve two limits of the acoustic forces. The lower limit corresponds to the minimum force required to overcome the gravitational force. The upper limit corresponds to the maximum acoustic pressure beyond which atomization of the droplet occurs. As the droplet size increases, the lower limit increases and the upper limit decreases. Therefore to have large droplets levitated, relatively flat radiation pressure amplitude during the translation is needed. In this study, using a finite element model, the Gor’kov potential was calculated for different heights between the reflector and the radiating plate. The application of the Gor’kov potential was extended to study the range of droplet sizes for which the droplets can be levitated and transported without atomization. It was found that the third resonant mode (H3–mode) represents the best compromise between high levitation force and smooth pattern transition, and water droplets of millimeter radius can be levitated and transported. The H3–mode also allows for three translation lines in parallel.

© 2012 Acoustical Society of America

ACKNOWLEDGMENT

The authors gratefully acknowledge the Swiss National Science Foundation (SNF), Grant No. 200021_122169 and the helpful discussions with Dr. Manish Tiwari, ETH Zurich.

Article Outline

  1. INTRODUCTION
  2. MODEL
    1. Theory
    2. Gor’kov potential and droplet levitation
    3. Finite element model
    4. Model validation
  3. RESULTS AND DISCUSSION
  4. CONCLUSIONS

RELATED DATABASES

To view database links for this article, you need to log in.

KEYWORDS and PACS

Keywords

acoustic devices, acoustic resonance, drops, finite element analysis, gravitation, plates (structures), radiation pressure, structural acoustics, water

PACS

ARTICLE DATA

History
Received 29 Jun 2011
Accepted 30 Nov 2011
Revised 15 Nov 2011
Digital Object Identifier
http://dx.doi.org/10.1121/1.3672700

PUBLICATION DATA

ISSN

0001-4966 (print)  

Publisher

$abstract.society.value is a Member of CrossRef Acoustical Society of America

For access to fully linked references, you need to log in.

Figures (9) Tables (2)

Access to article objects (figures, tables, multimedia) requires a subscription; log in to view available files.
(Access to supplementary files, where available, is free for this journal.)

Access to article objects (figures, tables, multimedia) requires a subscription; log in to view available files.
(Access to supplementary files, where available, is free for this journal.)



Close

Your Recent History Recent History Help

Recently Viewed

  1. Contactless transport of matter in the first five resonance modes of a line-focused acoustic manipulator
  2. Wave motion and dispersion phenomena: Veering, locking and strong coupling effects
  3. Effects of seeing the interlocutor on the production of prosodic contrasts (L)
  4. Evidence of the enhancement effect in electrical stimulation via electrode matching (L)
  5. The influence of age and high-frequency hearing loss on sensitivity to temporal fine structure at low frequencies (L)

Home Publications Meetings Contact ASA Site Map Back to Top

Copyright © Acoustical Society of America

close