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Shear viscosity of aluminum studied by shock compression considering elasto-plastic effects 被引量:1
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作者 马小娟 郝斌斌 +1 位作者 马海霞 刘福生 《Chinese Physics B》 SCIE EI CAS CSCD 2014年第9期331-334,共4页
The strength always exists before the material melts. In this paper, the viscoelastic-plastic model is applied to improve the finite difference method, and the numerical solutions for the disturbance amplitude damping... The strength always exists before the material melts. In this paper, the viscoelastic-plastic model is applied to improve the finite difference method, and the numerical solutions for the disturbance amplitude damping behavior of the sinusoidal shock front in a flyer-impact experiment are obtained. When the aluminum is shocked to 101 GPa, the effect of elasto-plasticity on the zero-amplitude point of the oscillatory damping curve is the same as that of viscosity when η= 700 Pa.s, and the real shear viscosity coefficient of the shocked aluminum is determined to be about 2800±100 Pa.s. Comparing the experiment data with the numerical results of the viscoelastic-plastic model, we find that the aluminum is close to melting at 101 GPa. 展开更多
关键词 shock shear viscosity elastoplasticity
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Shear Viscosity of Hot QED at Finite Chemical Potential from Kubo Formula
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作者 LIU Hui HOU De-Fu LI Jia-Rong 《Communications in Theoretical Physics》 SCIE CAS CSCD 2008年第8期429-436,共8页
Within the framework of finite temperature field theory this paper discusses the shear viscosity of hot QED plasma through Kubo formula at one-loop skeleton diagram level with a finite chemical potential The effective... Within the framework of finite temperature field theory this paper discusses the shear viscosity of hot QED plasma through Kubo formula at one-loop skeleton diagram level with a finite chemical potential The effective widths (damping rates) are introduced to regulate the pinch singularities and then gives a reliable estimation of the shear viscous coefficient.The finite chemical potential contributes positively compared to the pure temperature case. The result agrees with that from the kinetics theory qualitatively. 展开更多
关键词 shear viscosity QGP finite-temperature field theory chemical potential
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Shear Viscosity to Entropy Density Ratio in Au+Au Central Collisions
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作者 周铖龙 马余刚 方德清 《Plasma Science and Technology》 SCIE EI CAS CSCD 2012年第7期585-587,共3页
The shear viscosity (7) and entropy density (s) are studied for the central Au+Au collisions with the help of a microscopic transport model, namely the isospin-dependent quantum molecular dynamic model (IQMD). ... The shear viscosity (7) and entropy density (s) are studied for the central Au+Au collisions with the help of a microscopic transport model, namely the isospin-dependent quantum molecular dynamic model (IQMD). Employ the formula given in Ref. [1],η is calculated as a time dependent variable for different incident energies from 40 MeV/u to 120 MeV/u and the energy dependence of η/s of nuclear matter in the most compressed stage in collision process is displayed. 展开更多
关键词 shear viscosity entropy density heavy ion collision
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Remarks on a Real Viscous Heat-conducting Flow with Shear Viscosity
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作者 ZHANGZhi-ping WANGXiu-qin DENGShu-xian 《Chinese Quarterly Journal of Mathematics》 CSCD 北大核心 2005年第1期85-89,共5页
This paper is concerned with the global existence and exponential stability of solutions with large initial date in H^1 for real viscous heat-conducting flow with shear viscosity.
关键词 real viscous flow shear viscosity global existence
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Influence of Reverse Pressure on the Shear Viscosity of Hydrophilic Poly(ethylene terephthalate) Melt
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作者 Zeng-ge Guo Xin Li +2 位作者 Jian Li Bin Zhang 程博闻 《Chinese Journal of Polymer Science》 SCIE CAS CSCD 2014年第7期923-930,共8页
The effect of reverse pressure.on theological behavior has been studied. The apparatus is a capillary rheometer with counter pressure chamber being held at a high reverse pressure by means of a cock. The results show ... The effect of reverse pressure.on theological behavior has been studied. The apparatus is a capillary rheometer with counter pressure chamber being held at a high reverse pressure by means of a cock. The results show that with the increase in temperature, the shear viscosity of hydrophilic PET is reduced. It is different that the effect of temperature on shear viscosity is varied under the condition of all shear rates or all pressures, and the effect is more prominent at 50 MPa or at 216 s^-1. At the same time, the pressure coefficients decrease with increasing the shear rate and the temperature and tend to reach a constant value nearly at the temperature of 290 ℃. 展开更多
关键词 Hydrophilic PET shear viscosity PRESSURE Temperature shear rate Pressure coefficients.
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Power law of shear viscosity in Einstein-Maxwell-Dilaton-Axion model
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作者 凌意 冼卓宇 周振华 《Chinese Physics C》 SCIE CAS CSCD 2017年第2期64-73,共10页
We construct charged black hole solutions with hyperscaling violation in the infrared(IR) region in Einstein-Maxwell-Dilaton-Axion theory and investigate the temperature behavior of the ratio of holographic shear vi... We construct charged black hole solutions with hyperscaling violation in the infrared(IR) region in Einstein-Maxwell-Dilaton-Axion theory and investigate the temperature behavior of the ratio of holographic shear viscosity to the entropy density. When translational symmetry breaking is relevant in the IR, the power law of the ratio is verified numerically at low temperature T, namely, η/s ~ T^κ, where the values of exponent κ coincide with the analytical results. We also find that the exponent κ is not affected by irrelevant current, but is reduced by the relevant current. 展开更多
关键词 shear viscosity gauge/gravity duality hyperscaling violation Einstein-Maxwell-Dilaton-Axion model breaking of translational invariance
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Neighboring azimuthal bin-bin multiplicity correlation as a direct measure for the shear viscosity in relativistic heavy ion collisions
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作者 里霖 王美娟 吴元芳 《Chinese Physics C》 SCIE CAS CSCD 2013年第9期19-23,共5页
Neighboring azimuthal bin-bin multiplicity correlation is suggested to be a good measure for internal layer-to-layer interactions of the formed matter in relativistic heavy ion collisions. It is shown to be directly r... Neighboring azimuthal bin-bin multiplicity correlation is suggested to be a good measure for internal layer-to-layer interactions of the formed matter in relativistic heavy ion collisions. It is shown to be directly related to the shear viscosity of the formed matter. As an application of this method, the shear viscosity in the samples generated by a multi-phase transport model (AMPT) is estimated. The results are in qualitative agreement with the theoretical calculation from microscopic interactions, i.e., the larger the scattering cross section, the smaller the shear viscosity. 展开更多
关键词 neighboring azimuthal bin-bin multiplicity correlation shear viscosity relativistic heavy ion collision
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High Temperature Rheological Performance of Graphene Modified Rubber Asphalt
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作者 Heyuan GUO Chunhua LI +3 位作者 Xin ZHAO Yinghua YUAN Shaoqi TANG Yongjun MENG 《Research and Application of Materials Science》 2024年第1期9-15,共7页
To elucidate the high temperature rheological capability of graphene modified rubber asphalt,three contents of graphene and crumb rubber were prepared by a combination of mechanical agitation and high speed shearing m... To elucidate the high temperature rheological capability of graphene modified rubber asphalt,three contents of graphene and crumb rubber were prepared by a combination of mechanical agitation and high speed shearing machine,then used dynamic shear rheological test(DSR)and multiple stress creep recovery(MSCR)tests to evaluate.The hardness and softening point with rotational viscosity of samples raised with the addition of graphene,especially the addition of 0.04%.Dynamic shear rheological test revealedthat the dynamic shear modulus G*,rutting factor G*/Sin δ,and zero shear viscosity(ZSV)of graphene-modified rubber asphalt were greatly influenced along with graphene-increased,on the contrary,phase angle δ which characterize the viscoelastic ratio of asphalt decreased.Multiple stress creep recovery(MSCR)tests showed that the graphene-enhanced rubber asphalt had high-temperature stability through non-recoverable creep compliance(Jnr).Based on these findings,graphene-modified rubber asphalt binders with the addition of 0.04% graphene had good viscoelastic properties as well as high temperature rutting resistance performance.In the meantime,G*/Sin δ,ZSV,and Jnr100,Jnr3200 have good correlation,which can reveal the excellent high-temperature stability performance of asphalt. 展开更多
关键词 GRAPHENE High Temperature rheological properties MSCR Zero shear viscosity RUTTING
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Viscosity of aluminum under shock-loading conditions 被引量:1
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作者 马小娟 刘福生 +1 位作者 张明建 孙燕云 《Chinese Physics B》 SCIE EI CAS CSCD 2011年第6期505-508,共4页
A reliable data treatment method is critical for viscosity measurements using the disturbance amplitude damping method of shock waves. In this paper the finite difference method is used to obtain the numerical solutio... A reliable data treatment method is critical for viscosity measurements using the disturbance amplitude damping method of shock waves. In this paper the finite difference method is used to obtain the numerical solutions for the disturbance amplitude damping behaviour of the sinusoidal shock front in a flyer-impact experiment. The disturbance amplitude damping curves are used to depict the numerical solutions of viscous flow. By fitting the experimental data to the numerical solutions of different viscosities, we find that the effective shear viscosity coefficients of shocked aluminum at pressures of 42, 78 and 101 GPa are (1500±100) Pas, (2800±100) Pa.s and (3500±100) Pa.s respectively. It is clear that the shear viscosity of aluminum increases with an increase in shock pressure, so aluminum does not melt below a shock pressure of 101 GPa. This conclusion is consistent with the sound velocity measurement. 展开更多
关键词 shear viscosity ALUMINUM shock-load
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Interfacial properties of Daqing crude oil-alkaline system 被引量:3
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作者 LIN Mei-qin XU Xue-qin +3 位作者 LV Jing Zong Hua LI Ming-yuan DONG Zhao-xia 《Petroleum Science》 SCIE CAS CSCD 2011年第1期93-98,共6页
The oil/water interfacial properties of crude oil emulsions formed by alkaline/surfactant/ polymer(ASP) flooding in the Daqing Oilfield were investigated in this paper by the measurement of interfacial tension,inter... The oil/water interfacial properties of crude oil emulsions formed by alkaline/surfactant/ polymer(ASP) flooding in the Daqing Oilfield were investigated in this paper by the measurement of interfacial tension,interfacial shear viscosity and Zeta potential of the oil/water system.The result showed that both NaOH and Na_2CO_3 could react with acid substances in the crude oil to produce interfacially active components,which are adsorbed on the interfaces between the aqueous phase and oil phase, resulting in a decrease of the interfacial tension,negatively charging the surface of oil droplets,but making little change in the interfacial shear viscosity.For the same ionic strength of NaOH and Na_2CO_3, the interfacial tension of NaOH solution-crude oil system is lower,but the interfacial shear viscosity of NaOH solution-crude oil system is higher,than that of Na_2CO_3 solution-crude oil system.The negative value of the Zeta potential on the surface of the oil droplets is large.Accordingly,the O/W emulsion of NaOH solution-crude oil system is more stable than that of Na_2CO_3 solution-crude oil system. 展开更多
关键词 ALKALI interfacial tension interfacial shear viscosity Zeta potential TURBIDITY
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Effect of Petroleum Sulphonate on Interfacial Property and Stability of Crude Oil Emulsions 被引量:2
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作者 王慧云 李明远 +1 位作者 吴肇亮 林梅钦 《Chinese Journal of Chemical Engineering》 SCIE EI CAS CSCD 2005年第5期691-695,共5页
The influence of petroleum sulphonate (TRS) on interfacial properties and stability of the emulsions formed by formation water and asphaltene, resin and crude model oils from Gudong crude oil was investigated by measu... The influence of petroleum sulphonate (TRS) on interfacial properties and stability of the emulsions formed by formation water and asphaltene, resin and crude model oils from Gudong crude oil was investigated by measurement of interfacial shear viscosity, interfacial tension (IFT) and emulsion stability. With increasing petroleum sulphonate concentration, IFT between the formation water and the asphaltene, resin and crude model oils decreases significantly. The interfacial shear viscosity and emulsion stability of asphaltene and crude model oil system increase for the petroleum sulphonate concentration in the range 0.1% to 0.3%, and decrease slightly when the concentration of the surfactant is 0.5%. There exists a close correlation between the interfacial shear viscosity and the stability of the emulsions formed by asphaltene or crude model oils and petroleum sulphonate solution.The stability of the emulsions is determined by the strength of the interfacial film formed of petroleum sulphonate molecules and the natural interfacial active components in the asphaltene fraction and the crude oil. The asphaltene in the crude oil plays a major role in determining the interfacial properties and the stability of the emulsions. 展开更多
关键词 ASPHALTENE petroleum sulphonate (TRS) interfacial tension interfacial shear viscosity emulsion stability
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A STUDY ON THE BOUNDARY LAYER FOR THE PLANAR MAGNETOHYDRODYNAMICS SYSTEM 被引量:1
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作者 秦绪龙 杨彤 +1 位作者 姚正安 周文书 《Acta Mathematica Scientia》 SCIE CSCD 2015年第4期787-806,共20页
The paper aims to estimate the thickness of the boundary layer for the planar MHD system with vanishing shear viscosity μ. Under some conditions on the initial and boundary data, we show that the thickness is of the ... The paper aims to estimate the thickness of the boundary layer for the planar MHD system with vanishing shear viscosity μ. Under some conditions on the initial and boundary data, we show that the thickness is of the order √μ|lnμ|. Note that this estimate holds also for the Navier-Stokes system so that it extends the previous works even without the magnetic effect. 展开更多
关键词 magnetohydrodynamics system boundary layer vanishing shear viscosity
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Asymptotic Lifshitz-Like Solution in Lovelock Gravity (n=3)
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作者 于添翼 岳瑞宏 《Communications in Theoretical Physics》 SCIE CAS CSCD 2011年第8期281-288,共8页
With R^2 and R^3 corrections to asymptotical Lifshitz space-time, we obtain pure Lovelock gravity solution and solution with non-trivial matter in 7-dimensional space-time. Then we obtain the general solution for any ... With R^2 and R^3 corrections to asymptotical Lifshitz space-time, we obtain pure Lovelock gravity solution and solution with non-trivial matter in 7-dimensional space-time. Then we obtain the general solution for any arbitrary dimensional space. In this paper, we also study black brane solutions in 7-dimensionai Lifshitz space-time via the method of perturbation. And we popularize the black brane solution to arbitrary higher dimensions and discuss the ratio of shear viscosity to entropy density ratio η/s. Then we analyze the result of η/s to find that the correction of n-th (n ≥ 3) order Lovelock term has trivial influence to η/s. 展开更多
关键词 Lovelock gravity black hole black brane Horava-Lifshitz theory Lifshitz gravity shear viscosity
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Shear and bulk viscosity of high-temperature gluon plasma
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作者 Le Zhang De-Fu Hou 《Chinese Physics C》 SCIE CAS CSCD 2018年第6期59-66,共8页
We calculate the shear viscosity(η) and bulk viscosity(ζ) to entropy density(s) ratios η/s and ζ/s of a gluon plasma system in kinetic theory, including both the elastic gg←→gg forward scattering and the i... We calculate the shear viscosity(η) and bulk viscosity(ζ) to entropy density(s) ratios η/s and ζ/s of a gluon plasma system in kinetic theory, including both the elastic gg←→gg forward scattering and the inelastic soft gluon bremsstrahlung gg←→ggg processes. Due to the suppressed contribution to η and ζ in the gg←→gg forward scattering and the effective g←→gg gluon splitting, Arnold, Moore and Yaffe(AMY) and Arnold, Dogan and Moore(ADM) have got the leading order computations for η and ζ in high-temperature QCD matter. In this paper, we calculate the correction to η and ζ in the soft gluon bremsstrahlung gg←→ggg process with an analytic method.We find that the contribution of the collision term from the gg←→ggg soft gluon bremsstrahlung process is just a small perturbation to the gg←→gg scattering process and that the correction is at~ 5% level. Then, we obtain the bulk viscosity of the gluon plasma for the number-changing process. Furthermore, our leading-order result for bulk viscosity is the formula ζ∝(αs^2 T^3)/(lnαs^-1) in high-temperature gluon plasma. 展开更多
关键词 shear viscosity bulk viscosity entropy density high-temperature gluon plasma soft gluon bremsstrahlung
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On Regularity of Incompressible Fluid with Shear Dependent Viscosity
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作者 Hongjun YUAN Qiu MENG 《Chinese Annals of Mathematics,Series B》 SCIE CSCD 2012年第5期673-680,共8页
The authors consider a non-Newtonian fluid governed by equations with p-structure in a cubic domain.A fluid is said to be shear thinning(or pseudo-plastic) if 1 < p < 2,and shear thickening(or dilatant) if p >... The authors consider a non-Newtonian fluid governed by equations with p-structure in a cubic domain.A fluid is said to be shear thinning(or pseudo-plastic) if 1 < p < 2,and shear thickening(or dilatant) if p > 2.The case p > 2 is considered in this paper.To improve the regularity results obtained by Crispo,it is shown that the secondorder derivatives of the velocity and the first-order derivative of the pressure belong to suitable spaces,by appealing to anisotropic Sobolev embeddings. 展开更多
关键词 Non-Newtonian fluid REGULARITY shear dependent viscosity
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Modeling the Rheological Characteristics of Flexible High-Yield Pulp-Fibre-Reinforced Bio-Based Nylon 11 Bio-Composite
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作者 Robenson Cherizol Mohini Sain Jimi Tjong 《Journal of Encapsulation and Adsorption Sciences》 2015年第1期1-10,共10页
The aim of this work was to develop a mathematical model to investigate the rheological characteristics of viscoelastic pulp-fibre composite materials. The rheological properties of High-Yield Pulp (HYP) reinforced bi... The aim of this work was to develop a mathematical model to investigate the rheological characteristics of viscoelastic pulp-fibre composite materials. The rheological properties of High-Yield Pulp (HYP) reinforced bio-based Nylon 11 (Polyamide 11) (PA11) composite (HYP/PA11) were investigated using a capillary rheometer. Novel predicted multiphase rheological-model-based polymer, fibre, and interphasial phases were developed. Rheological characteristics of the compo-site components influence the development of resultant microstructures;this in turn affects mechanical characteristics of a multiphase composite. The main rheological characteristics of polymer materials are viscosity and shear rate. Experimental and theoretical test results of HYP/PA11 show a steep decrease in apparent viscosity with increasing shear rate, and this melt-flow characteristic corresponds to shear-thinning behavior in HYP/PA11. The non-linear mathematical model to predict the rheological behavior of HYP/PA11 was validated experimentally at 200°C and 5000 S-1?shear rate. Finally, predicted and experimental viscosity results were compared and found to be in a strong agreement. 展开更多
关键词 HYP/PA11 RHEOLOGICAL Characteristic viscosity/shear Rate MODELING
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Shear transformation zone dependence of creep behaviors of amorphous phase in a CuZr-based bulk metallic glass composite
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作者 JIANG SongShan GAN KeFu +2 位作者 HUANG YongJiang XUE Peng SUN JianFei 《Science China(Technological Sciences)》 SCIE EI CAS CSCD 2020年第8期1560-1565,共6页
The creep behaviors of the amorphous phase in a CuZr-based bulk metallic glass composite(BMGC)are studied by nanoindentation.Samples fabricated via higher cooling rates are found to exhibit more prominent creep,but a ... The creep behaviors of the amorphous phase in a CuZr-based bulk metallic glass composite(BMGC)are studied by nanoindentation.Samples fabricated via higher cooling rates are found to exhibit more prominent creep,but a smaller shear viscosity.The volume of the shear transformation zones(STZs)in the amorphous phase calculated based on a cooperative shear model increases with the cooling rate.The evolution of excess free volume created during creep deformation is clarified.A looser atomic arrangement leads to a larger STZ volume,thus facilitating creep deformation.This study gives a better understanding of the deformation behaviors of the amorphous phase in BMGCs. 展开更多
关键词 bulk metallic glass composite amorphous phase cooling rate shear viscosity shear transformation zone free volume
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On the Regularity of Shear Thickening Viscous Fluids 被引量:4
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作者 Francesca CRISPO 《Chinese Annals of Mathematics,Series B》 SCIE CSCD 2009年第3期273-280,共8页
The aim of this note is to improve the regularity results obtained by H. Beirao da Veiga in 2008 for a class of p-fluid flows in a cubic domain. The key idea is exploiting the better regularity of solutions in the tan... The aim of this note is to improve the regularity results obtained by H. Beirao da Veiga in 2008 for a class of p-fluid flows in a cubic domain. The key idea is exploiting the better regularity of solutions in the tangential directions with respect to the normal one, by appealing to anisotropic Sobolev embeddings. 展开更多
关键词 Non-Newtonian fluids shear dependent viscosity Boundary regularity
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Existence and Uniqueness of Strong Solution for Shear Thickening Fluids of Second Grade
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作者 BOUSBIH Hafedh MAJDOUB Mohamed 《Journal of Partial Differential Equations》 2014年第2期95-114,共20页
In this paper we study the equations governing the unsteady motion of an incompressible homogeneous generalized second grade fluid subject to periodic boundary conditions. We establish the existence of global-in-time ... In this paper we study the equations governing the unsteady motion of an incompressible homogeneous generalized second grade fluid subject to periodic boundary conditions. We establish the existence of global-in-time strong solutions for shear thickening flows in the two and three dimensional case. We also prove uniqueness of such solution without any smallness condition on the initial data or restriction on the material moduli. 展开更多
关键词 Non-Newtonian fluids generalized second grade fluids shear rate dependent viscosity EXISTENCE UNIQUENESS strong solution.
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Estimation of transport coefficients of dense hadronic and quark matter
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作者 Debashree Sen Naosad Alam Sabyasachi Ghosh 《Chinese Physics C》 SCIE CAS CSCD 2023年第4期212-223,共12页
In this study,we calculated transport coefficients including the shear viscosity and electrical conductivity relative to the density of dense hadronic and quark matter.By considering the simple massless limit for the ... In this study,we calculated transport coefficients including the shear viscosity and electrical conductivity relative to the density of dense hadronic and quark matter.By considering the simple massless limit for the quark matter and two different effective models for the hadronic matter,we estimated the transport coefficients of the two phases separately.Accordingly,density profiles of the transport coefficients were depicted in two parts:the phasespace part and the relaxation time part.From calculating the shear viscosity to density ratio,we also explored the nearly perfect fluid domain of the quark and hadronic matter. 展开更多
关键词 transport coefficients shear viscosity electrical conductivity dense matter
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