| Autor: |
Zahn, K., Lenke, R., Maret, G., Zahn, K., Lenke, R., Maret, G. |
| Zdroj: |
Journal de Physique II; April 1994, Vol. 4 Issue: 4 p555-560, 6p |
| Abstrakt: |
We present a new method to measure hydrodynamic friction forces on colloidal particles at very low (≃10-5) Reynolds numbers with high accuracy. Exploiting magnetic field induced aggregation of microscopic paramagnetic spheres into straight chains of calibrated length, we determine the anisotropic friction coefficient of the chains, with a range from one to 100 particles, by video-microscopic observation of sedimentation speed. The results are found to agree well with the Slender-body theory, even for small chain lengths. The effects of the proximity of a wall are also explored. |
| Databáze: |
Supplemental Index |
| Externí odkaz: |
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