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Acoustic forcing of a liquid drop
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Author | Lyell, M. J. |
| Copyright Year | 1992 |
| Description | The development of systems such as acoustic levitation chambers will allow for the positioning and manipulation of material samples (drops) in a microgravity environment. This provides the capability for fundamental studies in droplet dynamics as well as containerless processing work. Such systems use acoustic radiation pressure forces to position or to further manipulate (e.g., oscillate) the sample. The primary objective was to determine the effect of a viscous acoustic field/tangential radiation pressure forcing on drop oscillations. To this end, the viscous acoustic field is determined. Modified (forced) hydrodynamic field equations which result from a consistent perturbation expansion scheme are solved. This is done in the separate cases of an unmodulated and a modulated acoustic field. The effect of the tangential radiation stress on the hydrodynamic field (drop oscillations) is found to manifest as a correction to the velocity field in a sublayer region near the drop/host interface. Moreover, the forcing due to the radiation pressure vector at the interface is modified by inclusion of tangential stresses. |
| File Size | 6112421 |
| Page Count | 212 |
| File Format | |
| Alternate Webpage(s) | http://archive.org/details/NASA_NTRS_Archive_19920011167 |
| Archival Resource Key | ark:/13960/t4vj0fz22 |
| Language | English |
| Publisher Date | 1992-02-01 |
| Access Restriction | Open |
| Subject Keyword | Fluid Mechanics And Heat Transfer Radiation Effects Positioning Sound Waves Acoustic Levitation Oscillations Hydrodynamics Acoustics Hydrodynamic Equations Perturbation Velocity Distribution Radiation Pressure Drops Liquids Stress Distribution Sound Fields Space Processing Shear Stress Microgravity Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science |
| Content Type | Text |
| Resource Type | Technical Report |
