Physics – Condensed Matter – Soft Condensed Matter
Scientific paper
2011-03-04
Physics
Condensed Matter
Soft Condensed Matter
19 pages, 5 figures
Scientific paper
The temporal evolution of the spatially periodic electroconvection (EC) patterns has been studied within the period of the driving ac voltage by monitoring the light intensity diffracted from the pattern. Measurements have been carried out on a variety of nematic systems, including those with negative dielectric and positive conductivity anisotropy, exhibiting "standard EC" (s-EC), those with both anisotropies negative exhibiting "non-standard EC" (ns-EC), as well as those with the two anisotropies positive. Theoretical predictions have been confirmed for stationary s-EC and ns-EC patterns. Transitions with Hopf bifurcation have also been studied. While traveling had no effect on the temporal evolution of dielectric s-EC, traveling conductive s-EC and ns-EC patterns exhibited a substantially altered temporal behavior with a dependence on the Hopf frequency. It has also been shown that in nematics with both anisotropies positive, the pattern develops and decays within an interval much shorter than the period, even at relatively large driving frequencies.
Buka Agnes
Eber Nandor
Tóth-Katona Tibor
No associations
LandOfFree
Temporal response to harmonic driving in electroconvection does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Temporal response to harmonic driving in electroconvection, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Temporal response to harmonic driving in electroconvection will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-321098