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DY: Fachverband Dynamik und Statistische Physik
DY 40: Poster - Quantum Systems/ Stat. Phys./ Diffusive Process
DY 40.12: Poster
Thursday, April 3, 2014, 17:00–19:00, P3
Spontaneous imbibition in microfluidic pores — •Zeinab Sadjadi1, Michael Jung2, Heiko Rieger1, and Ralf Seemann2 — 1Theoretical Physics Department, Saarland University, Saarbrucken, Germany — 2Experimental Physics Department, Saarland University, Saarbrucken, Germany
Recently, spontaneous imbibition of wetting liquids in porous media consisting of elongated pores, has been studied theoretically [1,2]. The numerical simulation as well as analytical model predict that at a pore junction, meniscus propagation can come to a 'halt' for a certain amount of time. These 'arrest events' lead to a fast broadening of the imbibition front in the porous medium. Here we study this phenomenon in a single junction of three microfluidic pores and present experimental evidence for 'halt' of meniscus for the first time.
[1] S. Gruener, Z.Sadjadi, H.E. Hermes, A. V. Kityk, K. Knorr, S. U.Egelhaaf, H. Rieger and P. Huber, Proc. Natl. Acad. Sci. U. S. A. 109, 10245 (2012)
[2] Z. Sadjadi and H. Rieger, Phys. Rev. Lett.110, 144502 (2013)