Surface Tension Model for Oxide Slag

The model for TCS Metal Oxide Solutions Database (TCOX) surface tension of oxide slag:

where and indicate the site fraction and surface tension for pure component . For pure component, the surface tension is described with . The excess term is expressed using Redlich-Kister polynomial, as one can find the example of a binary A-B.

SIGM is the parameter used for optimization, for example,

PARAMETER SIGM (IONIC_LIQ, A;0)

PARAMETER SIGM (IONIC_LIQ, B;0)

PARAMETER SIGM (IONIC_LIQ, A:B,0)

The user can calculate the surface tension of liquid oxide by calling the variable SURF(IONIC).