2004/05/31 by Robert Krauss, Robert Krauß, Mario Liu +3
Biochemistry, Genetics and Molecular Biology · Engineering · Physics and Astronomy · #Characterization and Applications of Magnetic Nanoparticles #Geomagnetism and Paleomagnetism Studies #Micro and Nano Robotics #physics.flu-dyn
paper · pdf · doi:10.1063/1.1846956
published as Applied Physics Letters 86, 024102 (2005) · 3 pages, 4 figures
openalex publication_date 2004/12/30 · arxiv created 2005/04/04 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/28
A magnetic field rotating on the free surface of a ferrofluid layer is shown to induce considerable fluid motion toward the direction the field is rolling. The measured flow velocity (i) increases with the square of the magnetic field amplitude, (ii) is proportional to the thickness of the fluid layer, and (iii) has a maximum at a driving frequency of about 3kHz. The pumping speed can be estimated with a two-dimensional flow model.