Journal
PHYSICAL REVIEW E
Volume 105, Issue 1, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevE.105.L012701
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Funding
- JSPS KAKENHI [18K13520]
- Grants-in-Aid for Scientific Research [18K13520] Funding Source: KAKEN
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Marangoni flow driven by a temperature gradient was observed near the isotropic-nematic phase transition point. The direction of the flow was opposite in the isotropic and nematic phase, and depended on the coating materials in the coexistence state.
Marangoni flow driven by a temperature gradient was observed near the isotropic-nematic phase transition point. By applying the gradient to a liquid crystalline material in sandwich cells, it was possible to measure the flow field near the air interface using the photobleaching method. In the isotropic phase, the direction of the observed flow was opposite to that in the nematic phase. Moreover, when the measurement was performed in the coexistence state of these phases, the flow direction depended on the coating materials of the cell substrates. These singular flow properties are explained well by the singular changes in surface tension and the shape of the air interface near the transition point.
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