Abstract
In order to broaden the application range of liquid crystals, a new microfluidic drive and control method is proposed. Through a simulation model construction that links the plate motion and the liquid crystal backflow, we can study the coupling of the internal alignment and velocity fields of the liquid crystal in the model. On applying a continuous square wave electric field, the upper plate of the cell can be driven to move continuously, and the moving state can be related to the structure of the cell. When the gap between the two plates was 50 μm, the range of the change of tilt angle at the center of the cell was 6090°, and the induced backflow velocity profile was an S-shape. When the gap was 110 μm, because of the influence of the kickback effect, the range changed to 90100°, and the velocity profile was a double S-shape.
Publisher
Trans Tech Publications, Ltd.
Subject
Mechanical Engineering,Mechanics of Materials,General Materials Science
Reference8 articles.
1. S. Chandrasekhar, Liquid Crystals (second edition) . Cambridge, New York, (1992).
2. C. Liu, P. Deng, T. Tsuji and S. Chono, Fundamental study on new micro fluidic drive method based on liquid crystalline backflow, Research Journal of Applied Sciences, Engineering and Technology, 4 (2012), 4825-4829.
3. X. Wang, J. Engel, C. Liu, Liquid crystal polymer (LCP) for MEMS: processes and application, J. Micromech. Microeng. 13(2003), 628.
4. M. Carme Calderer, M. Gregory Forest, Q. Wang, Kinetic theories and mesoscopic models for solutions of non-homogeneous liquid crystal polymer, Journal of Non-Newtonian Fluid Mechanics, 120(2004), 69-78.
5. K.J. Lee, H.Z. Cheng, W.S. Jou, G.J. Chen and C.W. Liang, The influenced of carbon fiber orientation on the mechanical and tri-biological behavior of carbon fiber/LCP composites, Materials Chemistry and Physics, 102(2007), 187-194.