Abstract
The temperature dependency of the viscosity of molten pure metals has been thermodynamically discussed as a function of the liquid–state enthalpy. The following equation has been derived:
where
η and H are the viscosity (mPa·s) and liquid–state enthalpy (J/mol) at a given temperature T (K),
η0 and H
0 are the viscosity (mPa·s) and liquid–state enthalpy (J/mol) at the melting point or at any other temperature T
0 (K), higher than the melting point, C is a proportionality constant with a value of 0.986 (mPa·s), K is the constant coefficient, which is 1/4 (-) for pure metals, and R is the gas constant (J/mol/K). It has been found that the temperature dependency of various pure metals can be predicted using this equation.
