ON THE ADOPTION OF λ_0 VALUE FOR ROSCOE'S EQUATION

Abstract

Abstract: 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.

Key words: liquid metal, viscosity, Roscoe's equation, oscillatioal decrement

GUO Wenquan WANG Jingtang Laboratory of Rapidly Solidified Non-Equilibrium Alloys,Institute of Metal Research,Academia Sinica,Shenyang,China. ON THE ADOPTION OF λ_0 VALUE FOR ROSCOE'S EQUATION[J]. Acta Metallurgica Sinica (English Letters), 1992, 5(5): 369-372.

References

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