Highly anisotropic thermal conductivity of discotic nematic liquid crystalline films with homeotropic alignment

2017 ◽  
Vol 53 (58) ◽  
pp. 8227-8230 ◽  
Author(s):  
Dong-Gyun Kim ◽  
Yun Ho Kim ◽  
Tae Joo Shin ◽  
Eun Jung Cha ◽  
Da Som Kim ◽  
...  
Keyword(s):  
Thermal Conductivity ◽  
Liquid Crystals ◽  
Liquid Crystalline ◽  
Nematic Liquid Crystals ◽  
Free Standing ◽  
Conductivity Anisotropy ◽  
Anisotropic Thermal Conductivity ◽  
Crystalline Films ◽  
Homeotropic Alignment ◽  
Discotic Nematic Liquid Crystals

Homeotropic alignment and photo-crosslinking of discotic nematic liquid crystals yield free-standing films with high in-plane thermal conductivity and thermal conductivity anisotropy.

Spontaneous homeotropic alignment of nematic liquid crystals induced by a double-armed side chain liquid crystalline polymethacrylate

2017 ◽  
Vol 656 (1) ◽  
pp. 96-104 ◽  
Author(s):  
Osamu Haba ◽  
Wataru Matsuno ◽  
Nao Nakamura ◽  
Hiroshi Awano ◽  
Tatsuhiro Takahashi ◽  
...  
Keyword(s):  
Liquid Crystals ◽  
Liquid Crystalline ◽  
Nematic Liquid Crystals ◽  
Side Chain ◽  
Homeotropic Alignment

Conjugate Heat Transfer Simulations to Evaluate the Effect of Anisotropic Thermal Conductivity on Overall Cooling Effectiveness

2021 ◽  
pp. 1-26
Author(s):  
Carol E. Bryant ◽  
James L. Rutledge
Keyword(s):  
Heat Transfer ◽  
Thermal Conductivity ◽  
Gas Turbine ◽  
Conjugate Heat Transfer ◽  
Ceramic Matrix Composites ◽  
Conductivity Anisotropy ◽  
Cooling Effectiveness ◽  
External Cooling ◽  
Anisotropic Thermal Conductivity ◽  
Overall Effectiveness

Abstract Ceramic matrix composites (CMCs) show promise as higher temperature capable alternatives to traditional metallic components in gas turbine engine hot gas paths. However, CMC components will still require both internal and external cooling, such as film cooling. The overall cooling effectiveness is determined not only by the design of coolant flow, but also by the conduction through the materiel itself. CMCs have anisotropic thermal conductivity, giving rise to heat flow that differs somewhat relative to what we have come to expect from experience with traditional metallic components. Conjugate heat transfer computational fluid dynamics (CFD) simulations were performed in order to isolate the effect anisotropic thermal conductivity has on a cooling architecture consisting of both internal and external cooling. Results show the specific locations and unique effects of anisotropic thermal conduction on overall effectiveness. Thermal conductivity anisotropy is shown to have a significant effect on the resulting overall effectiveness. As CMCs begin to make their way into gas turbine engines, care must be taken to ensure that anisotropy is characterized properly and considered in the thermal analysis.

Induced Homeotropic Alignment of Nematic Liquid Crystals by Doping Side-on Carbosilane-based Oligomers

2018 ◽  
Vol 47 (9) ◽  
pp. 1180-1183
Author(s):  
Kosuke Kaneko ◽  
Masaki Goto ◽  
Yohei Haketa ◽  
Hiromitsu Maeda ◽  
Tomonori Hanasaki
Keyword(s):  
Liquid Crystals ◽  
Nematic Liquid Crystals ◽  
Homeotropic Alignment

Photochromic and fluorescent LC gels based on a bent-shaped azobenzene-containing gelator

RSC Advances ◽  
2015 ◽  
Vol 5 (70) ◽  
pp. 56891-56895 ◽  
Author(s):  
Alexey Bobrovsky ◽  
Valery Shibaev ◽  
Věra Hamplová ◽  
Vladimíra Novotna ◽  
Miroslav Kašpar
Keyword(s):  
Liquid Crystals ◽  
Liquid Crystalline ◽  
Molar Mass ◽  
Nematic Liquid Crystals

Photochromic liquid crystalline gels based on a low-molar-mass azobenzene-containing bent-shaped gelator and nematic liquid crystals were prepared.

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