Regensburg 2016 – wissenschaftliches Programm
Bereiche | Tage | Auswahl | Suche | Aktualisierungen | Downloads | Hilfe
CPP: Fachverband Chemische Physik und Polymerphysik
CPP 12: Poster: Colloids and Complex Fluids
CPP 12.15: Poster
Montag, 7. März 2016, 18:15–21:00, Poster B2
The self-diffusion coefficient in the magnetic fluids — •Alla Dobroserdova1 and Sofia Kantorovich1,2 — 1Ural Federal University, Lenin av. 51, Ekaterinburg, 620000 Russia — 2University of Vienna, Sensengasse 8, 1090 Vienna, Austria
We present the results on the self-diffusion coefficient in the systems of magnetic dipolar particles. Of course, there were some attempts to study diffusion [Yu. A. Buyevich et al., Physica. A 190, 276 (1992); P. Ilg, Phys. Rev. E 71, 051407 (2005); J. Jordanovic et al., Phys. Rev. Lett. 106, 038301 (2011)], but the detailed theoretical description is still missing. We consider the ferrofluids with chain aggregates of dipolar spheres in the three-dimensional case and with chains and rings in the quasi-two-dimensional one. We can study how the self-diffusion coefficient depends on the system polydispersity, granulometric composition, geometrical constraints and dipolar stregths. In our study, we combine theoretical approach and computer simulation. In theoretical study, we use Density Functional Approach to obtain the chain and ring concentrations. Then we can use them to obtain the self-diffusion coefficients. Also we perform molecular dynamics simulations. We compare theoretical results and data of the computer simulations and we have good agreement.