Abstract
An experimental system for liquid flow-rate measurements of pressure-driven flow through micro-channels is described. The displacement of a meniscus is tracked in a precision borehole using a laser distance meter mounted on a feed-back controlled traversing stage. Successful measurements of flow rates as small as 30 pl/s are reported when using non-evaporative hexadecane, and evaporative fluids such as ethanol are measured at flow rates of 0.1 nl/s. The set-up can also be used for measurements in time-dependent flows. Finally, a discussion of the influence of dissolved nitrogen on the measured flow rates is given.
| Original language | English |
|---|---|
| Pages (from-to) | 635-642 |
| Number of pages | 8 |
| Journal | Experiments in Fluids |
| Volume | 34 |
| Issue number | 5 |
| DOIs | |
| State | Published - May 2003 |