共查询到20条相似文献，搜索用时 15 毫秒
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A molecular dynamics simulation model is established based on the well-known Lennard-Jones 12-6 potential function to determine the surface tension of a Lennard-Jones liquid-vapor interface.The simulation is carried out with argon as the working fluid of a given molecular number at different temperature and different truncated radius.It is found that the surface tension of a Lennard-Jones fluid is likely to be bigger for a bigger truncated radius,and tends to be constant after the truncated radius increased to a certain value.It is also found that the surface tension becomes smaller as the temperature increases. 相似文献
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给出球状液滴表面张力和等摩尔面和张力面的计算公式,用分子动力学模拟了温度T*=0.65不同粒子数的球状液滴,计算了Tolman长度δ;计算同一温度下平液面的表面张力,利用Tolman方程计算δ。结果都显示δ取正值,随液滴半径增加而减小。 相似文献
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液体表面张力系数测量方法比较研究 总被引：1，自引：0，他引：1
赵群 《安徽科技学院学报》2010,24(2):44-47
表面张力在物理学中是一个重要的物理量。由于液体表面张力的大小取决于液体表面张力系数,所以测量液体表面张力系数具有重要意义。本文分别采用拉脱法、U型管法和水波频闪法,对在20℃条件下纯水表面张力系数展开测量。文中给出了相关实验原理和测量结果。误差分析结果表明,U型管法测量相对误差最小,测量精度最高。 相似文献
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硅力敏传感器测量液体表面张力系数和液膜受力分析 总被引：1，自引：0，他引：1
利用计算机实时监测硅力敏传感器输出的电压信号,提高了测量的精确度和科学性。用硅力敏传感器和计算机实时监测水的表面张力系数为7.410×10-2 N/m,记录了吊环的受力情况,分析了电压曲线变化的原因。对实验过程中出现的自升现象进行了分析,自升现象的出现使得液膜变薄、液膜的重力可以忽略不计,使测量结果误差较小。通过对整个拉脱过程的受力分析,使学生更深入地理解了拉脱法和表面张力的深刻内涵。 相似文献
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In this paper,an equation system of electrohydrodynamics(EHD)based onthe fluid motion equations is discussed.Emphasis is put on the effects of electrical forceand surface tension upon the fluid motion.The Marker and Cell method is used to set up acomputational simulation program of electrically driven motion of fluid.With the help ofthe program,a cylindrical fluid under the influences of electrical field and surface tensionhas been calculated.The result is in good agreement with the experimental observation. 相似文献
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最大气泡法测溶液表面张力实验数据处理的改良 总被引：1，自引：0，他引：1
为了改进最大气泡法测正丁醇溶液表面张力实验的数据处理,用希什科夫斯基模型拟合了σ—c关系曲线,拟合效果较好,拟合后的处理步骤简便,并用外推法确定正丁醇分子横截面积,结果更准确。 相似文献
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Theadsorptionkineticsofaqueoussurfactantsolu tionsatair/solutioninterfaceplaysamostimportantroleinwetting ,foamstability ,emulsionstability,fastcoat ing,detergency ,surfaceoscillation ,adsorptivebubbleseparationtechnique,etc.Theadsorption processcon sistsoftwosteps:thefirststepisthetransportofsurfac tantmoleculesfromthebulkphasetothesubsurfaceduetoaconcentrationgradient,i.e .thediffusionstep;thesecondoneisthetransportofmoleculesfromthesubsur facetothesurface,i.e.theadsorptionstep.Iftherateofth… 相似文献
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丁茹 《天津工程师范学院学报》2004,14(4):30-32
对NURBS(非均匀有理B样条)曲面的拟合算法和利用"权值"局部修改NURBS曲面的方法进行了研究,运用OpenGL技术实现了NURBS曲面的虚拟显示,通过血管的表面重建实验,验证了NURBS曲面拟合算法的正确性。 相似文献
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The problem of computing a piecewise linear approximation to a surface from its sample has been a focus of research in geometry modeling and graphics due to its widespread applications in computer aided design. In this paper, we give a new algorithm, to be called offset surface filtering (OSF) algorithm, which computes a piecewise-linear approximation of a smooth surface from a finite set of cloud points. The algorithm has two main stages. First, the surface normal on every point is estimated by the least squares best fitting plane method. Second, we construct a restricted Delaunay triangulation, which is a tubular neighborhood of the surface defined by two offset surfaces. The algorithm is simple and robust. We describe an implementation of it and show example outputs. 相似文献
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分析了具有周期折皱表面的半无限金属对电子集体激发的影响，采用流体力学模型计算了金属表面等离子振荡模，把其色散曲线与平面界面时的色散曲线相比较，分析了周期结构对色散关系的影响。 相似文献
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用MATLAB处理溶液表面张力实验数据 总被引：2，自引：0，他引：2
黄允中 《乐山师范学院学报》2003,18(4):29-31
介绍了用MATLAB处理表面张力测定实验数据的方法。通过这样的教学，能更好地达到实验教学的目的。 相似文献
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Based on the maximum flux principle(MFP),a water quality evaluation model for surface water ecosystem is presented by using self-organization map(SOM) neural network simulation algorithm from the aspect of systematic structural evolution.This evaluation model is applied to the case of surface water ecosystem in Xindu District of Chengdu City in China.The values reflecting the water quality of five cross-sections of the system at different developing stages are obtained,with stable values of 1.438,2.952,1.86... 相似文献
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用电子分析天平测量液体的表面张力系数 总被引：1，自引：0，他引：1
阐述用电子分析天平测量液体表面张力系数的原理和方法．对液体表面张力系数测量公式进行分析讨论,指出某些文献中所给出的拉脱法测液体表面张力系数实验测量公式存在的问题． 相似文献
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用简易装置测液体表面张力系数,得出一系列数据,通过用不同的数据处理方法得出结果,对结果进行比较、分析. 相似文献
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<正>The space-charge layer(SCL)and surface depletion area(SDA)model for beveled p-n junction is presented.The surface space-charge density is calculated for depletion case of beveled p-n junction.Based on the finite difference method, the effect of the equivalent surface charge density on the surface depletion area for positively beveled p-n junction is also studied.Thyristors passivated with polyimide(PI)or polyester improved silicon paint(SP)are fabricated to verify the effect of equivalent surface charge on the peripheral surface of beveled p-n junction.The change of leakage current is sensitive to the surface charges.It indicates that the selection of passivation materials is a significant process to ensure the breakdown voltage capability of beveled devices. 相似文献
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建立轴射圆柱面投影方法，研究轴射圆柱面投影下球面向圆柱面投影的理论，解决正投影无法解决的复杂的旋转体投影问题．用轴射圆柱面投影法的投影理论，建立球面和圆柱面的一一对应关系，找出二者之间的某些几何规律，该投影下任意形状的球面投影到圆柱面上是相等的，建立球面的轴射圆柱面投影定理，解决球面不规则计算问题． 相似文献