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fractal description of the Solid/Liquid Interface of a Directionally Solidified Superalloy with Different Phosphorus Content

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Journal of Materials Science & Technology 1993年第6期9卷 441-444页

作者： Liling SUN Lianke DONG Jinghua ZHANG Zhuangqi HU Institute of Metal Research,Academia Sinica,Shenyang,110015,China

The solid/liquid interface of a directionally solidified Ni-base superalloy with different phosphorus contents was quantitatively described by means of fractat *** the solidification rate was fixed,the relationship between the fractal dimensionality of the solid/liquid interface and the phos- phorus content of the test alloy was *** the thermodynamics and fractal theory,the ef- fect mechanism of phosphorus content on fractal dimensionality of the solid/liquid interface was discussed.

关键词： fractal description solid/liquid interface phosphorus superalloy

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An experimental investigation on the mechanism of fluid flow through single rough fracture of rock

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Science China(Technological Sciences) 2013年第8期56卷 2070-2080页

作者： JU Yang ZHANG QinGang YANG YongMing XIE HePing GAO Feng WANG HuiJie State Key Laboratory of Coal Resources and Safe Mining China University of Mining and Technology State Key Laboratory for Geomechanics and Deep Underground Engineering China University of Mining and Technology School of Mechanics and Civil Engineering China University of Mining and Technology Key Laboratory for Energy Engineering Safety and Disaster Mechanics of the Education Ministry Sichuan University

The structure of fractures in nature rock appears irregular and induces complicated seepage flow *** mechanism and quantitative description of fluid flow through rock fractures is a difficult subject that has been greatly concerned in the fields of geotechnical,mining,geological,and petroleum *** order to probe the mechanism of fluid flow and the effects of rough structures,we conducted a few laboratory tests of fluid flow through single rough fractures,in which the Weierstrass-Mandelbrot fractal function and PMMA material were employed to produce the fracture models with various fractal roughnesses.A high-speed video camera was employed to record the fluid flow through the entire single rough fracture with a constant hydraulic *** properties of fluid flow varying with the fracture roughness and the influences of the rough structure were *** components of flow resistance of a single rough fracture were discussed.A fractal model was proposed to relate the fluid resistance to the fracture roughness.A fractal equivalent permeability coefficient of a single rough fracture was *** study aims to provide an experimental basis and reference for better understanding and quantitatively relating the fluid flow properties to the structures of rock fractures.

关键词： seepage flow single fracture rough morphology fractal description rock fractures

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