Show/Hide Menu
Hide/Show Apps
Logout
Türkçe
Türkçe
Search
Search
Login
Login
OpenMETU
OpenMETU
About
About
Open Science Policy
Open Science Policy
Open Access Guideline
Open Access Guideline
Postgraduate Thesis Guideline
Postgraduate Thesis Guideline
Communities & Collections
Communities & Collections
Help
Help
Frequently Asked Questions
Frequently Asked Questions
Guides
Guides
Thesis submission
Thesis submission
MS without thesis term project submission
MS without thesis term project submission
Publication submission with DOI
Publication submission with DOI
Publication submission
Publication submission
Supporting Information
Supporting Information
General Information
General Information
Copyright, Embargo and License
Copyright, Embargo and License
Contact us
Contact us
ACOUSTIC LEVITATON OF AIR-FILLED SHELL-TYPE MATERIALS
Date
2015-07-16
Author
Kandemir, Mehmet Hakan
Çalışkan, Mehmet
Metadata
Show full item record
This work is licensed under a
Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License
.
Item Usage Stats
159
views
0
downloads
Cite This
Standing wave acoustic levitation technique utilizes a standing wave formed between a sound source and a reflector. Nodes of the standing wave act as linear springs to attract the particles towards the pressure nodes, thus particles can be suspended or levitated in air. Theoretically, any material in any state can be levitated using this technique. However, in practice, the attempts to levitate materials are limited to those mostly of regular shape. A common type is air-filled closed form shell structures. These types of structures are often encountered as the likes of drug capsules. In this study, standing wave acoustic levitation of air-filled materials is performed. A number of hollow shapes in several sizes are manufactured on three-dimensional printers. The standing wave field in the presence of air-filled materials is predicted by computer simulations through finite element software for both a single- axis set-up and an annular set-up where levitation experiments are carried out. The prospect of levitating air-filled materials in a standing wave acoustic levitation set-up is evaluated and demonstrated.
Subject Keywords
Acoustics
,
Engineering, mechanical
URI
https://hdl.handle.net/11511/53942
Collections
Department of Mechanical Engineering, Conference / Seminar
Suggestions
OpenMETU
Core
Standing wave acoustic levitation on an annular plate
Kandemir, Mehmet Hakan; Çalışkan, Mehmet (2016-11-10)
In standing wave acoustic levitation technique, a standing wave is formed between a source and a reflector. Particles can be attracted towards pressure nodes in standing waves owing to a spring action through which particles can be suspended in air. This operation can be performed on continuous structures as well as in several numbers of axes. In this study an annular acoustic levitation arrangement is introduced. Design features of the arrangement are discussed in detail. Bending modes of the annular plate...
Design and implementation of an annular acoustic levitation system
Kandemir, Mehmet Hakan; Çalışkan, Mehmet; Department of Mechanical Engineering (2014)
In standing wave acoustic levitation technique, a standing wave is obtained between a source and a reflector. Particles can be attracted towards pressure nodes in standing waves owing to the spring action. Hence, particles can be suspended in air. This operation can be performed on continuous structures as well as in several numbers of axes. In this study an annular acoustic levitation set-up is designed and built. The set-up consists of two langevin type piezoelectric transducers, two waveguides, an annula...
External Search Coil as a Means of Measuring Rotor Speed of an Induction Motor
Özlü Ertan, Hatice Gülçin; Keysan, Ozan (2009-07-03)
The study in this paper investigates whether the air gap harmonics can be identified by using an external search coil placed on the frame of an induction motor. For this purpose the study focuses on the prediction of rotor speed of an induction motor from external search coil emf, using spectral analysis techniques. In the first stage of the study the type of search coil which maximizes the induced emf is sought, also the position of the coil on the induced emf is investigated. Several motors are tested wit...
Investigation of air bubble motion in water through a vertical narrow rectangular channel by using image processing techniques
Özdemir, Sancak; Yeşin, Ahmet Orhan; Department of Mechanical Engineering (2005)
This thesis presents the study of air bubble motion in stagnant water and in upward flowing water through a vertical narrow rectangular channel of 2.1X66.5 mm cross section by using image processing and analyzing techniques. The investigated bubble size range is 2 - 70 mm in area equivalent bubble diameter and mean water flow velocity is 0-25 cm/s. This study focuses on the quantitative assessment of bubble size (perimeter, area, volume, width and height), shape, path and rising velocity. The observed bubbl...
Three dimensional axisymmetric sound propagation through a duct with aerosol
Arslan, Ersen; Çalışkan, Mehmet; Özyörük, Yusuf (Elsevier BV, 2018-11-10)
The aim of this study is to develop solutions for the propagation of spinning sound waves in air-filled circular ducts containing water droplets (regarded as an aerosol). There exist several theoretical approaches in literature for treatment of basic (mostly 1-D) aerosol problems with certain limitations, but these approaches are mostly suitable for plane waves. A numerical methodology based on the linearized Euler equations in frequency domain has been developed to account for spatial effects both in azimu...
Citation Formats
IEEE
ACM
APA
CHICAGO
MLA
BibTeX
M. H. Kandemir and M. Çalışkan, “ACOUSTIC LEVITATON OF AIR-FILLED SHELL-TYPE MATERIALS,” 2015, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/53942.
