402 research outputs found
Research on Heat Transfer Performance of the Open-Loop Micro Pulsating Heat Pipe with Self-Rewetting Fluids
No full textAs technology becomes increasingly miniaturized, extremely localized heat dissipation leads to the challenge of how to keep these devices from overheating. A pulsating heat pipe (PHP) is an excellent cooling device based on the phase change of a working fluid. Experiments are performed to investigate the thermal performances of a Micro Pulsating Heat Pipe (MPHP) using different working fluids. The MPHP consists of 20 parallel channels made of a copper capillary tube with an internal diameter of 0.8mm. The MPHP is filled with ethanol, deionized water and an aqueous solution of 1-butanol as working fluids, with different filling ratios (FRs) in the range 40-70vol.%. The 1-butanol aqueous solution is known as a self-rewetting fluid, i.e. a dilute aqueous solution of alcohols with a number of carbon atoms higher than four (such as 1-butanol and pentanol). The surface tension of self-rewetting fluids decreases gradually with an increase in temperature, reaching a minimum around 60 degrees C, and subsequently increases gradually at higher temperatures. Therefore, at relatively high temperature self-rewetting fluids flow towards the regions at higher temperature due to the Marangoni effect. This flow should improve the boiling phenomenon, which is very important in the heat transfer mechanism of the MPHP. The experimental results indicate that, in the case of self-rewetting fluid, the stable oscillating motion in the MPHP arises at the heat load regime lower than that with water. In addition, the effective thermal conductivity of the MPHP with the highest concentration of self-rewetting fluid is higher than that with other fluids in the high heat load regime
The molten glass sewing machine
No full textWe present a fluid-instability-based approach for digitally fabricating geometrically complex uniformly sized structures in molten glass. Formed by mathematically defined and physically characterized instability patterns, such structures are produced via the additive manufacturing of optically transparent glass, and result from the coiling of an extruded glass thread. We propose a minimal geometrical model—and a methodology—to reliably control the morphology of patterns, so that these building blocks can be assembled into larger structures with tailored functionally and optically tunable properties. This article is part of the themed issue ‘Patterning through instabilities in complex media: theory and applications’
Effect of Prefilmer Edge Thickness on Breakup Phenomena of Liquid Film in Prefilming Airblast Atomizer
No full text[EN] This paper describes the investigation of the effect of a prefilmer edge thickness on the breakup phenomena of a
liquid film in a prefilmer airblast atomizer. The breakup phenomena of the liquid film at five prefilmer edge
thicknesses (160, 500, 1250, 2000, and 3000 μm) under various conditions was observed using a high-speed
camera. The breakup length of the liquid film was calculated by an image processing technique developed in this
study. In order to quantitatively evaluate the effect of the prefilmer edge thickness on the breakup frequency, the
Fast Fourier Transformation (FFT) analysis was conducted based on the time evolution of the breakup length. The
results indicated that the breakup length increase and the breakup frequency decreases by increasing prefilmer
edge thickness due to a larger volume of a liquid accumulation attaching to the prefilmer edge. The FFT analysis
showed that the increase in prefilmer edge thickness causes the transition of the maximal power spectrum to a
lower frequency (i.e. less than 100 Hz) due to the increase in the liquid accumulation at the edge as well. Finally, a
dimensionless correlation has been proposed for the breakup length of a liquid film.Okabe, T.; Katagata, N.; Sakaki, T.; Inamura, T.; Fumoto, K. (2017). Effect of Prefilmer Edge Thickness on Breakup Phenomena of Liquid Film in Prefilming Airblast Atomizer. En Ilass Europe. 28th european conference on Liquid Atomization and Spray Systems. Editorial Universitat Politècnica de València. 154-161. https://doi.org/10.4995/ILASS2017.2017.4931OCS15416
中国雲南省テン池南東岸地域の家畜生産における栄養素フローの評価
No full textChapters 2 and 3 are the peer reviewed version of the following articles, respectively: Anzai H, Wang L, Oishi K, Irbis C, Li K, Kumagai H, Inamura T, Hirooka H. 2015. Estimation of nitrogen and phosphorus flows in livestock production in Dianchi Lake basin, China. Animal Science Journal. Amachika Y, Anzai H, Wang L, Oishi K, Irbis C, Li K, Kumagai H, Inamura T, Hirooka, H. 2015. Estimation of potassium and magnesium flows in animal production in Dianchi Lake basin, China. Animal Science Journal. , which have been published in final forms at http://dx.doi.org/10.1111/asj.12390 and http://dx.doi.org/10.1111/asj.12518, respectively These articles may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Self-Archiving.Chapter 4 is the peer reviewed version of the following article: Anzai H, Oishi K, Li K, Irbis C, Hirooka H, Inamura T, Kumagai H. 2011. Dietary nitrate loads on cows in dairy farms near Lake Dian, Kunming city, Yunnan Province, China. Trace Nutrient Research 28, 54-57., which has been published in final form at http://www.jtnrs.com/sym28/P-07.pdf.京都大学0048新制・課程博士博士(農学)甲第19768号農博第2164号新制||農||1040(附属図書館)学位論文||H28||N4984(農学部図書室)32804京都大学大学院農学研究科応用生物科学専攻(主査)教授 廣岡 博之, 教授 松井 徹, 教授 稲村 達也学位規則第4条第1項該当Doctor of Agricultural ScienceKyoto UniversityDFA
Translocation Renal Cell Carcinoma: An Update on Clinicopathological and Molecular Features
No full textMicrophthalmia-associated transcription (MiT) family translocation renal cell carcinoma (tRCC) comprises Xp11 tRCC and t(6;11) RCC. Due to the presence of fusion genes, Xp11 tRCC and t(6;11) RCC are also known as TFE3- and TFEB-rearranged RCC, respectively. TFE3 and TFEB belong to the MiT family, which regulates melanocyte and osteoclast differentiation, and TFE3- and TFEB-rearranged RCC show characteristic clinicopathological and immunohistochemical features. Recent studies identified the fusion partner-dependent clinicopathological and immunohistochemical features in TFE3-rearranged RCC. Furthermore, RCC with chromosome 6p amplification, including TFEB, was identified as a unique subtype of RCC, along with ALK-rearranged RCC. This review summarizes these recent advancements in our tRCC-related knowledge
Instrumental resolution of the chopper spectrometer 4SEASONS evaluated by Monte Carlo simulation
No full textLasers in nuclear physic proceedings of the International Symposium on Lasers in Nuclear Physics held at Nishina Hall, RIKEN, Saitama, Japan, 9 - 10 September, 1991
No full textGeometric proto-symbol manipulation towards language-based motion pattern synthesis and recognition
No full text- …
