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A fractal study for nucleate pool boiling heat transfer of nanofluids

Science China(Physics,Mechanics & Astronomy) 2010年第1期53卷 30-37页

作者： XIAO BoQi 1 , JIANG GuoPing 2 & CHEN LingXia 1 1 Department of Physics and Electromechanical Engineering, sanming university, sanming 365004, China 2 Earthquake Engineering Research Test Center, Guangzhou university, Guangzhou 510405, China Department of Physics and Electromechanical Engineering Sanming University Sanming China Earthquake Engineering Research Test Center Guangzhou University Guangzhou China

In this paper, a fractal model for nucleate pool boiling heat transfer of nanofluids is developed based on the fractal distribution of nanoparticles and nucleation sites on boiling surfaces. The model shows the dependences of the heat flux on nanoparticle size and the nanoparticle volume fraction of the suspension, the fractal dimension of the nanoparticle and nucleation site, temperature of nanofluids and properties of fluids. The fractal model predictions show that the natural convection stage continues relatively longer in the case of nanofluids. The addition of nanoparticles causes a decrease of the pool nucleate boiling heat transfer. The nucleate pool boiling heat transfer coefficient is decreased by increasing particle concentration. An excellent agreement between the proposed model predictions and experimental data is found. The validity of the fractal model for nucleate pool boiling heat transfer is thus verified.

关键词： nanofluid nucleate pool boiling fractal heat transfer

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Synthesis and structure of Cd[(bipy)(im)2(Oxal)0.5]NO3(H2O)

Synthesis and structure of Cd[(bipy)(im)2(Oxal)0.5]NO3(H2O)

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中国化学会第五届全国结构化学学术会议

作者： Wang Renzhang~* Zhang Qiwei Dong Guowen Li Fuying Niu Yu Department of Chemistry & Biology,sanming university,sanming,Fujian,365004

The title compound was synthesized by hydrothermal method with(COOH),2, 2’-bipy,Cd(NO)·2HO,im and HO in 175℃ for 6 days.X-ray analysis show that the title compound is a monoclinic crystal and group of P2,with a=9.5...

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关于“后危机时代”经济社会发展战略的思考

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湖南科技大学学报（社会科学版） 2010年第3期13卷 70-74页

作者：吴细玲三明学院政治法律系福建三明365004

"发展才是硬道理",对于中国这样的发展中国家尤其如此。在"后危机时代",中国应该在科学发展观指导下,尽可能规避风险,理性地应对危机,走中国特色的社会主义发展道路。为此,要正确处理虚拟经济和实体经济的关系,重视资源储备,致力于经济... 详细信息

"发展才是硬道理",对于中国这样的发展中国家尤其如此。在"后危机时代",中国应该在科学发展观指导下,尽可能规避风险,理性地应对危机,走中国特色的社会主义发展道路。为此,要正确处理虚拟经济和实体经济的关系,重视资源储备,致力于经济转型,实现中国经济社会科学发展、又好又快发展、可持续发展,并以人为本,拉动内需,最终实现人与社会的全面发展。

关键词：后危机时代科学发展观经济转型可持续发展

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信息伪装与真-伪信息筛选

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山东大学学报（理学版） 2011年第11期46卷 38-43页

作者：林蓉张丽三明学院数学与计算机科学系福建三明365004 山东大学数学学院山东济南250100

P-集合是由内P-集合XF(internal packet set XF)与外P-集合XF(outer packet set XF)构成的集合对,或者(XF,XF)是P-集合。P-集合具有动态特征。利用内P-集合的结构与动态特征,给出F珔-信息伪装的概念、F珔-信息伪装的结构与特征,给出F珔... 详细信息

P-集合是由内P-集合XF(internal packet set XF)与外P-集合XF(outer packet set XF)构成的集合对,或者(XF,XF)是P-集合。P-集合具有动态特征。利用内P-集合的结构与动态特征,给出F珔-信息伪装的概念、F珔-信息伪装的结构与特征,给出F珔-信息伪装模与真-伪信息筛选定理和真-伪信息筛选的应用。P-集合生成的F珔-信息伪装是P-集合的重要研究分支之一,是信息系统研究中一个新的研究方向。

关键词： P-集合 F-信息伪装伪装模筛选定理

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X-ray Photoelectron Spectroscopy Characterization of Silicone Rubber Surface Modified by CF4 Radio Frequency Plasma

X-ray Photoelectron Spectroscopy Characterization of Silicon...

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第18届国际真空大会

作者： S. H. Gao a * L. H. Gao a K. S. Zhou b a Department of Physics Mechanical and Electrical Engineering sanming university sanming 365004 China b School of Physics Science and Technology Central South university Changsha 410083 China

Silicone rubber （SIR） samples, which are employed in outdoor insulators, were treated by CF4 radio frequency （RF） capacitively coupled plasma. The hydrophobic and oleophobic properties were characterized in static contact angle method. X-ray photoelectron spectroscopy （XPS） was used to test the variation of the functional groups on the modified SIR surface. The results indicate that the H2O and CH2I2 static contact angles of SIR surface are improved from 100.7° and 61.6° to 150.2° and 123.6°, respectively. According to the XPS analysis, it is suggested that the formation of super-hydrophobic surface ascribes to the formation of [-SiFx（CH3）2-x-O-]n （x = 1, 2） structure produced by the direct attachment of F atoms to Si, especially, the formation of [-SiF2-O-]n structure is one of main factors of super-hydrophobic surface.

关键词： Silicone Rubber XPS Hydrophobic and Oleophobic Properties

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