Abstract
Nitrogen and helium flows in smooth and rough microtubes are studied experimentally. The measured friction factors in smooth tubes with diameters ranging from 50 μm to 200 μm are in good agreement with the theoretical correlation for conventional tubes and no clear earlier transition from laminar to turbulent is observed. But the friction results in rough tubes are much higher. Due to the micro size effect, non-conventional factors would contribute much to the flow characteristics. The factors that may have significant effects on flow characteristics are discussed.
| Original language | English |
|---|---|
| Pages (from-to) | 1025-1027 |
| Number of pages | 3 |
| Journal | Kung Cheng Je Wu Li Hsueh Pao/Journal of Engineering Thermophysics |
| Volume | 25 |
| Issue number | 6 |
| State | Published - Nov 2004 |
Keywords
- Experimental research
- Gaseous flow
- Microscale