Multisalt-Version of viscosity calculation according to Duan et al 2009 and Zhang et al 1997: Considers NaCl and KCL, with geometric mixture rule
function dynamicViscosity_DuanZhang_pTXd input SI.Pressure p_Pa; input SI.Temp_K T_K; input SI.MassFraction X[:] "mass fraction m_NaCl/m_Sol"; input SI.Density d; input SI.MolarMass MM[:]; input BrineProp.SaltDataDuan.SaltConstants[:] Salt_Constants; output SI.DynamicViscosity eta; end dynamicViscosity_DuanZhang_pTXd;