Time dynamics of the nematic liquid crystal director in the field of a sequence of rectangular pulses

Alaverdyan, R. B.; Aslanyan, A. L.; Aslanyan, L. S.; Gevorgyan, G. S.; Pakhalov, V. B.

doi:10.1134/s0030400x10100188

Cited by 1 publication

(5 citation statements)

References 7 publications

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“…Moreover, the saturation angle , which fully corresponds to the physics of the phenomenon under consideration [12,13,20,21]. In this case, the previously discovered accumulation effect is observed [11,12]. This confirms the correctness of the calculations and the accuracy of the results obtained.…”

Section: Theory and Experiment Results Of Computer Modelingsupporting

confidence: 82%

“…where d is Comparison of the figures given in the present paper with figures from works [12,13,20,21] showed that the two-dimensional model quite accurately reflects the previously discovered accumulation effect, both within each period 0 T and within several periods 0 T [11,12]. Moreover, the saturation angle , which fully corresponds to the physics of the phenomenon under consideration [12,13,20,21].…”

Section: Theory and Experiment Results Of Computer Modelingsupporting

confidence: 71%

“…1) formed from NLC 4-Cyano-4'pentylbiphenyl (4-Cyano-4'-pentylbiphenyl or 5CB), well known from publications in the scientific and scientific literature (see e.g. [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18]). In this geometry, the equation of director motion, which expresses the balance between the elastic and viscous torque and the external field torque, has close-to-zero initial and boundary conditions.…”

Section: Lc Cell Structuresmentioning

confidence: 99%

“…The establishment of the basic relationship between the properties of liquid crystals (LCs) and their structure [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17] is important for various applications. The research in this field includes the development of a theoretical model for the object under study, considering its response to external actions (electric or magnetic fields, light, etc.…”

Section: Introductionmentioning

confidence: 99%

“…Although the fact that the phenomenon of the change in the director orientation of an LC in electric and/or magnetic fields has been studied in detail for static and slowly varying fields [1][2][3][4][5], the research of this phenomenon in a pulsed-periodic electric field is of practical interest [11][12][13]. We should note that in the paper [11] the time dynamics of the director of the nematic liquid crystal (NLC) in the field of a sequence of rectangular pulses was studied but for another cell configuration and lower electrode voltage.…”

Section: Introductionmentioning

confidence: 99%

See 4 more Smart Citations

Computer simulation of the pulse-periodic electric field effect on the 2D director orientation of nematic liquid crystal. Experimental research of multimode nematic liquid crystal waveguides.

Ayriyan¹,

Ayryan²,

Egorov³

2021

JRE

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In this paper, we numerically investigate a two-dimensional differential equation describing the motion of a director of a nematic liquid crystal for the case of an alternating external electric field. The presence of the previously discovered accumulation effect has been confirmed by numerical modeling. A comparison is made with the case of a constant electric field, and also a qualitative comparison with an experiment is given. Incomplete agreement with experimental data indicates the need for further research. However, it should be noted that the constructed mathematical model of the phenomenon allows at this stage to obtain estimates that are sufficiently acceptable for experiment and correctly predict the dynamics of processes in liquid crystals. An analysis of the features of the propagation of quasi-waveguide modes in a liquid crystal waveguide showed that, in the case of dynamic processes, such effects as power exchange between coupled modes, leakage of modes, re-emission of modes into modes of a different order, etc., can be observed. The programs for numerical solution and computer modeling of two-dimensional parabolic partial differential equation were developed both in FORTRAN and C/C++. The results obtained are important for further investigation of dynamic processes inside non-stationary liquid crystal layers, both from a theoretical point of view for understanding kinetic processes in liquid crystals and from a practical point of view when organizing and conducting different experimental research.

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