2) surface tension temperature coefficient 表面温度张力系数 1. Numerical results show the important effect of surface tension temperature coefficient γ/ T on the fluid flow pattern. 当γ/ T为+ 3-5×10-4时,与负的表面温度张力系数情形相反,熔池中只存在沿逆时针方向流动的主对流环。
It is shown that the temperature coefficient of surface tension is negative, being -0.470 dyne/cm·℃ at 1100-1500℃. A maximum was observed on the surface tension-temperature curve at 1350℃, indicating an apparent positive coefficient up to this temperature. This is ex- plained by the ...
Estimation of the temperature coefficient of surface tension of the interface between phases which form a eutectic doi:10.1134/s10740-008-2018-6SURFACE tensionSOLIDSTHERMODYNAMICSCHANGESURFACES (Physics)PHYSICSPHASE transitionsThe article discusses the surface tension of interference betw...
A simple semiempirical model is derived that provides estimates of the temperature coefficient of surface tension if the following properties are known at a certain temperature: density, temperature coefficient of density and surface tension. Adsorption effects are neglected. From a combination of ...
It aims the development of a thermodynamic analysis able to foresee the temperature and composition ranges where a positive temperature coefficient of the surface tension is likely to occur. This treatment is based on the Butler equation [5], which was the first workable procedure to describe ...
supercooling melt softening temperature Surface tension constitution softened volume shrinkage 过冷液体软化温度表面张力组织退火的体积收缩 wenku.baidu.com 3. Analysis of spray cooling heat transfer coefficient on high temperature surface 高温表面喷雾冷却传热系数的理论分析 www.ilib.cn 4. Low Temperature Surfa...
where γLv,0 is the surface tension of the liquid [Nm] at a reference temperature T0 (normally T0 = 20 °C) and a is the temperature coefficient [Nm/T]. The second value γsv is the surface tension of the solid. The parameter a is positive for one phase substance. If we ...
The spreading coefficient of a solution of given concentration was added to twice its equilibrium value of surface tension to give the work of adhesion. This was then plotted as a function of temperature. The work of adhesion of pure water on wax increased with temperature for advancing ...
The temperature distribution within the SSC’s (T) can be estimated knowing the SSC’s temperature (T), the ambient medium (Tamb), and heat transfer coefficient of the SSC’s (hr) by using the following equation: (6.2)−n·−λ∇T=hTTamb−T The temperature evolution within the ...
Surface Tension and Its Temperature Coefficient for Liquid Metals Temperature-dependent surface tension gamma(1v)(T) and its temperature coefficient gamma'(1V)(T) [=d gamma(1V)(T)/dT] for liquid metals are thermodynamically determined on the basis of an established model for surface energy of...