磁場印加時における平行平板間ネマティック液晶流の非定常挙動の数値シミュレーション(流体工学,流体機械)

概要

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Unsteady behavior of a nematic liquid crystal is simulated by using the Leslie-Ericksen theory as a constitutive equation. After a magnetic field is imposed on nematic flow between parallel plates, the director keeps a symmetric posture with respect to the channel centerline for a certain period, and afterwards, the symmetry is destroyed and the director reorients to the direction parallel to the magnetic field. When the magnetic field intensity is high, the period is short. While pressure gradient at the channel centerline shows the same behavior as that of orientation angle of the director for low magnetic field intensity, it indicates two-stepwise complicated variation before reaching the steady state for high magnetic field intensity. For liquid crystalline flow, pressure depends on the transverse position of a channel. An overshoot phenomenon of pressure near the channel wall is simulated numerically for high magnetic field intensity, which agrees with experimental results.
一般社団法人日本機械学会の論文
2004-12-25