郭文全
,
王景唐
金属学报
通过对Roscoe绝对粘度计算公式的适用条件和推导过程的研究,提出了由实验测量液态金属的深度H与振动对数衰减率λ的关系曲线,并将其外延到H→0时所对应的λ值,作为原λ_0的取值(记为λ_f)的方法,液态Cu和Sn的实验结果表明,所提出的方法不仅满足原公式的使用条件,而且消除了“端面和滑动”等影响,使计算准确。
关键词:
粘度
,
viscosity
,
Roscoe's equation
GUO Wenquan WANG Jingtang Laboratory of Rapidly Solidified Non-Equilibrium Alloys
,
Institute of Metal Research
,
Academia Sinica
,
Shenyang
,
China
金属学报(英文版)
Considering the availability and derivation of Roscoe's equation for absolute viscosity calcula- tion,the method to adopt λ_0 value,so-called λ_f,was proposed by experimentally deter- mining relational curve of the measured height,H,of metal melt vs logarithmic oscillation decrement,λ,extrapolating H into zero,if such corresponding λ value is taken.Experimental results show that the proposed method not only satisfies the availability of original equation but also eliminate the effects of:“end and slippage”,so as to improve the accuracy for liquid Cu and Sn examinations.
关键词:
liquid metal
,
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,
null
,
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