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| 1 | Computational modeling of cavitating flows in liquid nitrogen by an extended transport-based cavitation model显示文摘Developing a robust computational strategy to address the rich physical characteristic involved in the thermodynamic effects on the cryogenic cavitation remains a challenge in research. The objective of the present study is to focus on developing modelling strategy to simulate cavitating flows in liquid nitrogen. For this purpose, numerical simulation over a 2D quarter caliber hydrofoil is investigated by calibrating cavitation model parameters and implementing the thermodynamic effects to the Zwart cavitation model. Experimental measurements of pressure and temperature are utilized to validate the extensional Zwart cavitation model. The results show that the cavitation dynamics characteristic under the cryogenic environment are different from that under the isothermal conditions: the cryogenic case yields a substantially shorter cavity around the hydrofoil, and the predicted pressure and temperature inside the cavity are steeper under the cryogenic conditions. Compared with the experimental data, the computational predictions with the modified evaporation and condensation parameters display better results than the default parameters from the room temperature liquids. Based on a wide range of computations and comparisons, the extensional Zwart cavitation model may predict more accurately the quasi-steady cavitation over a hydrofoil in liquid nitrogen by primarily altering the evaporation rate near the leading edge and the condensation rate in the cavity closure region. | SUN TieZhi MA XiangFu WEI YingJie WANG Cong | 2016 | Science China(Technological Sciences)2016，59，2： | 5 |
| 2 | Numerical investigation of temperature effect on unsteady cavitat- ing flow of liquid hydrogen around hydrofoil显示文摘 | Ma Xiangfu Wei Yingjie Wang Cong Huang Wenhu | 2013 | Chinese Journal of Hydrodynamics2013，28，2： | 1 |
| 3 | Parallel Study on Potential and Existing Geographical Distribution of Haloxylon Dominated Desert Vegetation in China显示文摘By applying ARC/INFO (NT version) of the GIS software package , we extracted the existing geographicaldistribution ofHaloxylon dominated desertvegetationandproduced athematicmap ofgeographical distribution of theexisting Haloxylon dominated desert vegetation based on the newly published Vegetation Atlas of China;we defined the adaptiveparameter range ofgeographical and climate ofHaloxylon dominated desert vegetation to generate the potential geographical distribution map of Haloxylon dominated desert vegetation with thesupport of GREEN software. We then sliced and compared the existing and thepotential distribution maps. The results show that the potential geographical distribution areas of Haloxylon ammodendron and Haloxylon persicum dominated desert vegetation accord with the existing distribution areas in the administration division, and the topographic types in both the distribution areas are similar. However, the borders of different directions ofthe potential H. ammodendron dominated desert vegetation distribution has surpassed 0.4° to 5.9° of the existing borders. The borders of different directions of the potential H. persicum dominated desert vegetation has surpassed 0.9° to 3.3° of the existing borders. In China, the existing geographical distributionalarea ofH. ammodendron dominated desertvegetation accounts for 9.1% of the potential one in China and the proportion of the existing H. persicum dominated desert vegetation distribution area to the potential areais 34.1%. The result of comparison of the potential and the existing distribution areaof Haloxylon dominated desert vegetation can provide important scientific basisfor the recovery, reconstruction and introduction of Haloxylon dominated desertvegetation. | GUO Quanshui WANG Chunling TAN Deyuan MA Chao WANG Xiangfu HAO Jianxi HE Hongyan | 2006 | Chinese Forestry Science and Technology2006，5，2： | 0 |
| 4 | Plasmon-induced near-field and resonance energy transfer enhancement of photodegradation activity by Au wrapped CuS dual-chain显示文摘Self-assembled chain-like nanostructures utilizing localized surface plasmon resonance(LSPR)effect could enhance the local electromagnetic field for energy transfer,which provides huge structural advantages for some transmission-related applications such as photocatalysis.In this work,the dual-chain structure of Au chain wrapped CuS(denoted as Au Chain@CuS)was successfully synthesized by the one-step hydrothermal method.Namely,L-cysteine is used as the sulfur source and linking agent,and copper nitrate is the precursor of copper ions,forming the dual-chain driven by 15 nm uniform Au seeds.Transient absorption spectroscopy(TAS)and finite-difference-time-domain(FDTD)simulation exhibited the highly intensive electromagnetic field around the self-assembly chain,the raised formation and transfer rate of electron–hole pairs between the Au chain and surrounding CuS chain.Meanwhile,it shows an excellent photodegradation activity on dye rhodamine B(RhB).Within 1 h under simulated sunlight,the degradation rate reached 98.81%in Au Chain@CuS,which is 2.27 times higher compared to the bare CuS.The enhanced performance is mainly attributed to the near-field enhancement effect induced by LSPR,as well as the benefits of more effective resonance energy transfer(RET).This research comprehensively shows the electromagnetic field in LSPR metal chain is more intensive by order of magnitude relative to the isolated particles.Simultaneously the continuous CuS chain wrapped outside of the LSPR source effectively absorbs and utilizes the plasmonic energy,then promotes the formation of the photo-generated charge,thus increasing the photocatalytic performance.This founding of wrapped coupled-metal dual-chain provides a promising candidate for the highly efficient photocatalysts. | Jinming Ma Xiangfu Liu Rongwen Wang Feng Zhang Guoli Tu | 2022 | Nano Research2022，15，6： | 0 |
| 5 | Durable metal-enhanced fluorescence flexible platform by in-situ growth of micropatterned Ag nanospheres显示文摘Here, we demonstrate an in-situ growth of micropatterned silver nanospheres(Ag NS) array on transparent polyimide(PI), namely PI-Ag substrate, applied as a flexible platform for metal-enhanced fluorescence(MEF). The scheme proposed here can easily control the grid formation of Ag NSs and the particle size inside, thus achieving patterned fluorescence imaging and MEF efficiency optimization. Meanwhile, the magnitude of enhanced intensity, relying on the distance between Ag NSs and emissive molecules, was systematically investigated by exploring diverse polyethyleneimine(PEI) spacer thickness. Consequently,an optimal enhancement factor of 7.9 and a pattern of grid fluorescence imaging was obtained with an insertion of 10 nm PEI on the PI-Ag(25 nm) platform. Moreover, owing to robust adhesion between Ag NSs and PI film by in-situ growth, this flexible PI-Ag MEF platform maintained a stable MEF efficiency even after taking mechanical bending for 1000 cycles. This new surface-confined micropatterned Ag NSs PI film provides a promising candidate in design flexible MEF platforms for future analytical and clinical sensing applications. | Xiangfu Liu Rongwen Wang Jinming Ma Jibin Zhang Pengfei Jiang Yao Wang Guoli Tu | 2021 | Journal of Materials Science & Technology2021，，10： | 0 |
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