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A New Explicit Equation for Calculating the Friction Factor for the Turbulent Flow in Pipes

Wang Yong,Yuan Qi

Strategic Study of CAE 2006, Volume 8, Issue 6,   Pages 83-88

Abstract:

The friction factor for the turbulent flow in pipes is the binary nonlinear function of Reynolds numberCalculating friction factor by implicit Colebrook equation have to use iterative algorithm, which isfactor.factor for the turbulent flow in pipes was obtained.factor in the range of smooth pipe and the rough region easily.

Keywords: turbulent flow     friction factor     implicit Colebrook equation     genetic algorithms     intelligent fitting method    

Friction Theory for Toroidal Drive

Xu Lizhong,Huang Zhen

Strategic Study of CAE 2002, Volume 4, Issue 3,   Pages 63-67

Abstract: Based on above-mentioned results, formulae of the friction coefficient between the planet and statorBased on EHL theory, formulae of the friction coefficient between the planet and stator or worm underThen, formulae of the friction coefficient between the planet and stator or worm under mixed frictionFinally, by making use of the above-mentioned formulae, the friction coefficients between the planetto roughness under mixed friction are also discussed.

Keywords: toroidal drive     friction coefficient     sliding factor    

Comparative study of oscillating flow characteristics of cryocooler regenerator at low temperatures

Yonglin JU , Qingqing SHEN ,

Frontiers in Energy 2009, Volume 3, Issue 1,   Pages 80-84 doi: 10.1007/s11708-009-0008-y

Abstract: A brief review is presented on previous experimental results and correlations on the friction factorA comparison of the friction factor data with those of other studies is presented to clarify the reason

Keywords: friction factor     regenerator     oscillating flow     high frequency    

Analysis of nonlinear channel friction inverse problem

CHENG Weiping, LIU Guohua

Frontiers of Structural and Civil Engineering 2007, Volume 1, Issue 2,   Pages 205-210 doi: 10.1007/s11709-007-0024-0

Abstract: decomposition (SVD) for general inverse matrices and the optimization algorithm are used to solve the channel frictionThe resolution and covariance friction inverse model in matrix form is developed to examine the reliability

Keywords: singular     SVD     second-order     covariance     Theoretical    

Effects of leakage and friction on the miniaturization of a Wankel compressor

Yilin ZHANG, Wen WANG

Frontiers in Energy 2011, Volume 5, Issue 1,   Pages 83-92 doi: 10.1007/s11708-010-0125-7

Abstract: The discussion is related to the effect of leakage and friction on the design limit (cooling capacityThe largest friction originates from the clearance among the end face of the eccentric shaft, the end

Keywords: meso-scale     Wankel compressor     leakage     friction    

A multi-probe micro-fabrication apparatus based on the friction-induced fabrication method

Zhijiang WU, Chenfei SONG, Jian GUO, Bingjun YU, Linmao QIAN

Frontiers of Mechanical Engineering 2013, Volume 8, Issue 4,   Pages 333-339 doi: 10.1007/s11465-013-0276-4

Abstract:

A novel multi-probe micro-fabrication apparatus was developed based on the friction-induced fabricationCombining the friction-induced scanning with selective etching in KOH solution, various micro-patternsefficiency fabrication device, the multi-probe micro-fabrication apparatus may encourage the development of friction-induced

Keywords: friction-induced fabrication     silicon     surface texture     friction     multi-probe    

Experimental investigation on heat transfer effect of conical strip inserts in a circular tube under laminar flow

M. ARULPRAKASAJOTHI,K. ELANGOVAN,K. HEMA CHANDRA REDDY,S. SURESH

Frontiers in Energy 2016, Volume 10, Issue 2,   Pages 136-142 doi: 10.1007/s11708-015-0389-z

Abstract: The aim of this paper is to observe the Nusselt number and friction factor behavior of the circular tubeFinally, correlations have been derived using regression analysis for predicting the Nusselt number and frictionfactor.

Keywords: Nusselt number     friction factor     conical strip    

Expressions for Differential and Apparent Coefficients of Static Friction

Wang Weiyuan

Strategic Study of CAE 2001, Volume 3, Issue 8,   Pages 29-32

Abstract:

Recently, scientists and engineers are interested in coefficients of static friction on micro andOn macro scale, the friction force is proportional to load, the apparent coefficients of static frictionHowever, a lot of experiments carried out with scanning microscope, atomic force microscope and frictionIn this paper, from the definition of differential coefficients of static friction, the expressions fordifferential and apparent coefficients of static friction, 〓 and 〓 for several models are deduced.

Keywords: differential coefficients of static friction     coefficients of static friction on micro or nano scale     apparentcoefficients of static friction     coefficients of static friction on macro scale    

Air-side heat transfer and friction characteristics of biofouled evaporator under wet conditions

Hui PU, Guoliang DING, Xiaokui MA, Haitao HU, Yifeng GAO,

Frontiers in Energy 2010, Volume 4, Issue 3,   Pages 306-312 doi: 10.1007/s11708-009-0067-0

Abstract: The effects of biofouling on air-side heat transfer and friction characteristics under wet conditionscondition of the biofouled area ratio of 60% at the inlet air velocity of 2.0m/s; The ranges of frictionfouling factor and heat transfer fouling factor are 19.8%―43.1% and ―15.6%―13.1%,

Keywords: finned tube     evaporator     fouling     heat transfer     friction    

Modeling of the minimum cutting thickness in micro cutting with consideration of the friction around

Tianfeng ZHOU, Ying WANG, Benshuai RUAN, Zhiqiang LIANG, Xibin WANG

Frontiers of Mechanical Engineering 2020, Volume 15, Issue 1,   Pages 81-88 doi: 10.1007/s11465-019-0561-y

Abstract: Friction modeling between the tool and the workpiece plays an important role in predicting the minimumIn this study, a new three-region friction modeling is proposed to illustrate the material flow mechanismaround the friction zone in micro cutting; estimate the stress distributions on the rake, edge, andThe friction modeling is established by determining the distribution of normal and shear stress.Micro cutting experiments are conducted to validate the accuracy of the friction and the minimum cutting

Keywords: tool friction     minimum cutting thickness     finite element method     tool edge radius     micro cutting    

Study of base friction simulation tests based on a complicated engineered bridge slope

Liu HE, Guang WU, Hua WANG

Frontiers of Structural and Civil Engineering 2012, Volume 6, Issue 4,   Pages 393-397 doi: 10.1007/s11709-012-0174-6

Abstract: In this paper, a physical base friction test model of a slope is established.slope in both its natural state and during excavation loading is qualitatively analyzed through base frictionThe base friction test results are then subjected to comparison and analysis using finite element numerical

Keywords: base friction test     slope stability evaluation     bridge slope    

Parametric study on the Multangular-Pyramid Concave Friction System (MPCFS) for seismic isolation

Wei XIONG, Shan-Jun ZHANG, Li-Zhong JIANG, Yao-Zhuang LI

Frontiers of Structural and Civil Engineering 2020, Volume 14, Issue 5,   Pages 1152-1165 doi: 10.1007/s11709-020-0659-7

Abstract: conducted on a steel-frame structure Finite-Element (FE) model with the Multangular-Pyramid Concave Frictionparametric study with varying controlling parameters, such as isolation foundation, inclination angle, friction

Keywords: seismic isolation     variable frequency     near-fault earthquake     numerical study     Multangular-Pyramid Concave Friction    

Laboratory and field evaluation of asphalt pavement surface friction resistance

Zhong WU, Chris ABADIE

Frontiers of Structural and Civil Engineering 2018, Volume 12, Issue 3,   Pages 372-381 doi: 10.1007/s11709-017-0463-1

Abstract:

Pavement surface friction is a significant factor for driving safety and plays a critical role inHowever, the current asphalt mixture design procedure does not directly consider friction as a requirementThe objective of this study was to develop a surface friction prediction model that can be used duringon twenty-two selected asphalt pavement sections using different in situ devices including Dynamic Frictionsuited in checking whether the selected aggregates in a wearing course mix design would meet field friction

Keywords: friction skid resistance     polishing     PSV     LWST     micro-texture     macro-texture    

Predictive model to decouple the contributions of friction and plastic deformation to machined surface

Subhash ANURAG, Yuebin GUO,

Frontiers of Mechanical Engineering 2010, Volume 5, Issue 3,   Pages 247-255 doi: 10.1007/s11465-010-0097-7

Abstract: Furthermore, the individual contribution of tool/work friction and plastic deformation of work materialsprovides a finite element method based on a predictive model to decouple the contributions of tool/work frictiondeformation of work material contributes to the majority of surface temperature, whereas the tool/work frictionA large tool/work friction leads to higher surface temperatures, and the use of a cutting tool with physicalreversal from subsurface maximum residual to surface maximum residual stress may occur when tool/work friction

Keywords: surface temperature     friction     residual stress     finite element analysis (FEA)     dry cutting     tool property    

Effect of friction coefficients on the dynamic response of gear systems

Lingli JIANG, Zhenyong DENG, Fengshou GU, Andrew D. BALL, Xuejun LI

Frontiers of Mechanical Engineering 2017, Volume 12, Issue 3,   Pages 397-405 doi: 10.1007/s11465-017-0415-4

Abstract: The change in the lubrication conditions is modeled by the changes in the friction coefficients, therebydemonstrated by the mean and root mean square values calculated by the simulated responses under different friction

Keywords: dynamic response     friction coefficient     wind loads     wind turbine gearbox    

Title Author Date Type Operation

A New Explicit Equation for Calculating the Friction Factor for the Turbulent Flow in Pipes

Wang Yong,Yuan Qi

Journal Article

Friction Theory for Toroidal Drive

Xu Lizhong,Huang Zhen

Journal Article

Comparative study of oscillating flow characteristics of cryocooler regenerator at low temperatures

Yonglin JU , Qingqing SHEN ,

Journal Article

Analysis of nonlinear channel friction inverse problem

CHENG Weiping, LIU Guohua

Journal Article

Effects of leakage and friction on the miniaturization of a Wankel compressor

Yilin ZHANG, Wen WANG

Journal Article

A multi-probe micro-fabrication apparatus based on the friction-induced fabrication method

Zhijiang WU, Chenfei SONG, Jian GUO, Bingjun YU, Linmao QIAN

Journal Article

Experimental investigation on heat transfer effect of conical strip inserts in a circular tube under laminar flow

M. ARULPRAKASAJOTHI,K. ELANGOVAN,K. HEMA CHANDRA REDDY,S. SURESH

Journal Article

Expressions for Differential and Apparent Coefficients of Static Friction

Wang Weiyuan

Journal Article

Air-side heat transfer and friction characteristics of biofouled evaporator under wet conditions

Hui PU, Guoliang DING, Xiaokui MA, Haitao HU, Yifeng GAO,

Journal Article

Modeling of the minimum cutting thickness in micro cutting with consideration of the friction around

Tianfeng ZHOU, Ying WANG, Benshuai RUAN, Zhiqiang LIANG, Xibin WANG

Journal Article

Study of base friction simulation tests based on a complicated engineered bridge slope

Liu HE, Guang WU, Hua WANG

Journal Article

Parametric study on the Multangular-Pyramid Concave Friction System (MPCFS) for seismic isolation

Wei XIONG, Shan-Jun ZHANG, Li-Zhong JIANG, Yao-Zhuang LI

Journal Article

Laboratory and field evaluation of asphalt pavement surface friction resistance

Zhong WU, Chris ABADIE

Journal Article

Predictive model to decouple the contributions of friction and plastic deformation to machined surface

Subhash ANURAG, Yuebin GUO,

Journal Article

Effect of friction coefficients on the dynamic response of gear systems

Lingli JIANG, Zhenyong DENG, Fengshou GU, Andrew D. BALL, Xuejun LI

Journal Article