Acoustic field positioning for containerless processing

Whymark, R. R.

doi:10.1016/0041-624x(75)90072-4

Cited by 177 publications

(90 citation statements)

References 2 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Similar phenomena occur in the field of ultrasonics [15,16]. Beissner [17] discussed models for the radiation pressure in ultrasonic fields from the points of view adopted by Langevin and Brillouin, and compared them in the context of measurements of the radiation force on an absorber at oblique incidence.…”

Section: Previous Workmentioning

confidence: 94%

Tailored Force Fields for Space-Based Construction

Komerath

Wanis²,

Czechowski³

2003

AIP Conference Proceedings

View full text Add to dashboard Cite

Section: Previous Workmentioning

confidence: 94%

Tailored Force Fields for Space-Based Construction

Komerath

Wanis²,

Czechowski³

2003

AIP Conference Proceedings

View full text Add to dashboard Cite

“…The order of magnitude of the average flow rate Q due to squeeze action over all the boundaries can be determined, approximately, from, (16) This value implies that the velocity in the vertical direction (see Fig.1) is a small quantity of a higher order. This inference is applied to the Navier-Stokes equation,…”

Section: Squeeze-film Ultrasonic Levitation With Inertia Effectmentioning

confidence: 99%

“…In 1975, Whymark [16] reported that a brass planar disk of 50 mm in diameter and 0.5 mm in thickness was levitated extremely close to a piston vibration source driven harmonically at a frequency of 20 kHz. These levitation effects reported by Salbu and Whymark were named as squeeze-film levitation and also called near-field acoustic levitation.…”

Section: Fundamentals Of Ultrasonic Levitation 21 Standing Wave Levimentioning

confidence: 99%

“…[15] presented an acoustic chamber for positioning of molten materials in an extreme temperature gradient. Whymark [16] proposed an acoustic levitator for positioning of materials in space using a single source of sound that achieved fine position control by adjusting the reflector. Lierke [17] presented an acoustic levitator for positioning materials samples in mirror furnaces when processing in space.…”

Section: Fundamentals Of Ultrasonic Levitation 21 Standing Wave Levimentioning

confidence: 99%

See 1 more Smart Citation

Some fundamental aspects of self-levitating sliding contact bearings and their practical implementations

Atherton

Mares

Stolarski

2014

Proceedings of the Institution of Mechanical Engineers, Part J:

View full text Add to dashboard Cite

In this study, fundamental aspects and mechanisms of acoustic levitation together with governing equations are presented first. Then, the acoustic levitation phenomenon is considered as a new way to design air suspension systems capable of self-levitation. A particular emphasis is laid on journal bearings and their specific geometrical configuration. A practical feasibility of using acoustic levitation to separate contacting surfaces is supported and illustrated by results of experimental testing of a number of prototype devices.

show abstract

“…This approach relies on minimizing the Gorkov potential [35] and its gradient of a spherical object, which results in maximizing the acoustic trapping force on the sphere [19]. The user specifies the arrangement of the transducers and the levitation location by a three-points antinode-node-antinode pattern.…”

Section: Controlling the Acoustic Fieldmentioning

confidence: 99%

Joled

Sahoo

Nakamura

Marzo

et al. 2016

Proceedings of the 29th Annual Symposium on User Interface Software and Technology

View full text Add to dashboard Cite

We present JOLED, a mid-air display for interactive physical visualization using Janus objects as physical voxels. The Janus objects have special surfaces that have two or more asymmetric physical properties at different areas. In JOLED, they are levitated in mid-air and controllably rotated to reveal their different physical properties. We made voxels by coating the hemispheres of expanded polystyrene beads with different materials, and applied a thin patch of titanium dioxide to induce electrostatic charge on them. Transparent indium tin oxide electrodes are used around the levitation volume to create a tailored electric field to control the orientation of the voxels. We propose a novel method to control the angular position of individual voxels in a grid using electrostatic rotation and their 3D position using acoustic levitation. We present a display in which voxels can be flipped independently, and two mid-air physical games with a voxel as the playable character that moves in 3D across other physical structures and rotates to reflect its status in the games. We demonstrate a voxel update speed of 37.8 ms/flip, which is video-rate.

show abstract

Acoustic field positioning for containerless processing

Cited by 177 publications

References 2 publications

Tailored Force Fields for Space-Based Construction

Tailored Force Fields for Space-Based Construction

Some fundamental aspects of self-levitating sliding contact bearings and their practical implementations

Joled

Contact Info

Product

Resources

About