Convective Instability of Magnetized Ferrofluids: Influence of Magnetophoresis and Soret Effect
| dc.creator | Shliomis, Mark I. | |
| dc.date | 2001-06-20 | |
| dc.date.accessioned | 2026-07-07T02:41:51Z | |
| dc.date.available | 2026-07-07T02:41:51Z | |
| dc.description | Convective instability in a ferrofluid layer heated from below or from above in the presence of a uniform vertical magnetic field is investigated theoretically. Convection is caused by a magnetic mechanism based on the temperature and concentration dependence of magnetization. An imposed temperature gradient establishes (by the Soret effect) a concentration gradient of magnetic particles of which the ferrofluid is composed. Both these gradients cause a spatial variation in magnetization, which induces a gradient of magnetic field intensity within the fluid layer. The field gradient induces in its turn an additional redistribution of magnetic grains due to magnetophoresis. Resulting self-consistent magnetic force tries to mix the fluid. A linear stability analysis predicts oscillatory instability in a certain region of the magnetic field strength and the fluid parameters. The instability owes magneto- and thermophoresis its origin: were the particle diffusion not operative, then only stationary instability would occur. A discovery of predicted convective oscillations is expected in ferrofluid layers about 1 mm thick, where the buoyancy mechanism is negligible and the characteristic diffusion time is not too long. | |
| dc.description | 18 pages, 6 figures, To appear in "Lecture Notes in Physics" (Springer, 2001) | |
| dc.identifier | https://arxiv.org/abs/cond-mat/0106413 | |
| dc.identifier | http://arxiv.org/abs/cond-mat/0106413 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/17907 | |
| dc.subject | Soft Condensed Matter | |
| dc.subject | Materials Science | |
| dc.title | Convective Instability of Magnetized Ferrofluids: Influence of Magnetophoresis and Soret Effect | |
| dc.type | text |