Back to Search
Start Over
Comparison of Faxén's correction for a microsphere translating or rotating near a surface.
- Source :
-
Physical review. E, Statistical, nonlinear, and soft matter physics [Phys Rev E Stat Nonlin Soft Matter Phys] 2009 Feb; Vol. 79 (2 Pt 2), pp. 026301. Date of Electronic Publication: 2009 Feb 02. - Publication Year :
- 2009
-
Abstract
- Boundary walls in microfluidic devices have a strong influence on the fluid flow and drag forces on moving objects. The Stokes drag force acting on a sphere translating in the fluid is increased by the presence of a neighboring wall by a factor given by Faxén's correction. A similar increase in the rotational drag is expected when spinning close to a wall. We use optical tweezers to confirm the translational drag correction and report the hitherto unmeasured rotational equivalent. We find that the corrections for the rotational motion is only required for particle-wall separations an order of magnitude shorter than that for the translational cases. These results are particularly significant in the use of optical tweezers for measuring viscosity on a picolitre scale.
Details
- Language :
- English
- ISSN :
- 1539-3755
- Volume :
- 79
- Issue :
- 2 Pt 2
- Database :
- MEDLINE
- Journal :
- Physical review. E, Statistical, nonlinear, and soft matter physics
- Publication Type :
- Academic Journal
- Accession number :
- 19391834
- Full Text :
- https://doi.org/10.1103/PhysRevE.79.026301