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relative energy dissipation：Sensitive to Structural Changes of Liquids

Chinese Physics Letters 2002年第1期19卷 94-97页

作者：祖方遒郭丽君等 LaboratoryofInternalFrictionandDefectsinSolids InstituteofSolidStatePhysicsChineseAcademyofSciencesHefei230031 DepartmentofMaterialsScienceandEngineering HefeiUniversityofTec

energy dissipation techniques, widely used in solid physics previously, are proven to be sensitive also to changes in liquid structure. It has been suggested from relative energy dissipation that changes in liquid structure can occur as a function of temperature in some ordinary binary systems such as Pb-Sn, In-Sn and In-Bi. This finding may be helpful to understand liquid structure changing patterns, therefore enriching the phenomenology of liquid state physics. This is significant for engineering practices.

关键词： relative energy dissipation Sensitive Structural Changes Liquids

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Experimental and numerical investigation for energy dissipation of supercritical flow in sudden contractions

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Journal of Groundwater Science and Engineering 2020年第4期8卷 396-406页

作者： Rasoul Daneshfaraz Ehsan Aminvash Reza Esmaeli Sina Sadeghfam John Abraham Department of Civil Engineering Faculty of EngineeringUniversity of MaraghehMaraghehIran Department of Civil Engineering University of MaraghehMaraghehIran University of St Thomas School of EngineeringSt PaulUSA

Dealing with kinetic energy is one of the most important problems in hydraulic structures,and this energy can damage downstream *** study aims to study energy dissipation of supercritical water flow passing through a sudden *** experiments were conducted on a sudden contraction with 15 cm width.A 30 cm wide flume was *** relative contraction ranged from 8.9 to 9.7,where relative contraction refers to the ratio of contraction width to initial flow *** Froude value in the investigation varied from 2 to *** contraction width of numerical simulation was 5~15 cm,the relative contraction was 8.9~12.42,and the Froude value ranged from 8.9~*** order to simulate turbulence,the k-εRNG model was *** experimental and numerical results demonstrate that the energy dissipation increases with the increase of Froude ***,with the sudden contraction,the rate of relative depreciation of energy is increased due to the increase in backwater profile and downstream flow *** experimentation verifies the numerical results with a correlation coefficient of 0.99 and the root mean square error is 0.02.

关键词： relative energy dissipation Hydraulic jump Sudden contraction

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