Loading...
Please wait, while we are loading the content...
Similar Documents
Drop evaporation in a single-axis acoustic levitator
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Author | Croonquist, A. P. Lierke, E. G. |
| Copyright Year | 1990 |
| Description | A 20 kHz single-axis acoustic positioner is used to levitate aqueous-solution drops (volumes less than or approximately equal to 100 micro-liters). Drop evaporation rates are measured under ambient, isothermal conditions for different relative humidities. Acoustic convection around the levitated sample enhances the mass loss over that due to natural convection and diffusion. A theoretical treatment of the mass flow is developed in analogy to previous studies of the heat transfer from a sphere in an acoustic field. Predictions of the enhanced mass loss, in the form of Nusselt (Sherwood) numbers, are compared with observed rages of drop shrinking. The work is part of an ESA crystal growth from levitated solution drops. |
| File Size | 286290 |
| Page Count | 12 |
| File Format | |
| Alternate Webpage(s) | http://archive.org/details/NASA_NTRS_Archive_19910012043 |
| Archival Resource Key | ark:/13960/t6k120869 |
| Language | English |
| Publisher Date | 1990-05-01 |
| Access Restriction | Open |
| Subject Keyword | Materials Processing Crystal Growth Microgravity Applications Acoustic Levitation Evaporation Free Convection Evaporation Rate Drops Liquids Aqueous Solutions Sound Fields Diffusion Microgravity Heat Transfer Mass Flow Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science |
| Content Type | Text |
| Resource Type | Article |
