| ??? 03/02/06 21:58 Read: times |
#111112 - Ultrasound Responding to: ???'s previous message |
I have seen something similar before where the solution used was ultrasound. In that example the fluid was an oil so wavelengths and hence frequencies were different. Anyway the basic principle is to sweep an emitter on one side of the pipe and listen with a couple of spaced receivers on the other side. At low frequencies the wavelength is greater than the mean particle size and both receivers pick up. As you approach the mean particle size, diffraction begins to take place and one reciver dips and the other rises in output. At wavelengths shorter than the mean particle size the output begins to increase again.
Of course you need to be carefull to distinguish mean particle size from mean particle separation which also produces a similar effect but at a different frequency. More than that I cannot say due to NDA. Ian |
| Topic | Author | Date |
| Mean particle size | 01/01/70 00:00 | |
| Prices lovely prices | 01/01/70 00:00 | |
| Mean particles | 01/01/70 00:00 | |
| Meanies | 01/01/70 00:00 | |
| Ultrasound | 01/01/70 00:00 | |
| Maybe | 01/01/70 00:00 | |
| Jokes and an answer :-) | 01/01/70 00:00 | |
| Results | 01/01/70 00:00 | |
| Coulter counter | 01/01/70 00:00 | |
| wheres my money then?? | 01/01/70 00:00 | |
| Flow cytometry | 01/01/70 00:00 | |
yep but a leetle bit expensive | 01/01/70 00:00 |