Nonlinear transport and anomalous Brownian motion in soft-mode turbulence

Koyo Tamura, Yusril Yusuf, Yoshiki Hidaka, Shoichi Kai

Research output: Contribution to journalArticlepeer-review

22 Citations (Scopus)


Soft-mode turbulence (SMT) is a recently discovered type of spatiotemporal chaos observed in the electrohydrodynamic instability (EHD) of a nematic liquid crystal with homeotropic alignment. Its novelty is that it occurs as the first supercritical bifurcation from a stable stationary state in the weakly nonlinear regime of EHD. A particle, small compared to the characteristic length of the macroscopic flow, injected in SMT travels, with random velocity similar to a particle in Brownian motion. We find that the particle trajectory exhibits anomalous Brownian motion such as pumped flight and that the macroscopic diffusion constant due to weak turbulence is about 103 times larger than the diffusion constant associated with the rest state. The stochastic properties of SMT are discussed.

Original languageEnglish
Pages (from-to)2805-2808
Number of pages4
Journaljournal of the physical society of japan
Issue number10
Publication statusPublished - Oct 1 2001

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)


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