| surfaceTensionSurface tension in region 4 between steam and water |  | 
| T | Type: Temperature (K) Description: Temperature (K) | 
|---|
| sigma | Type: SurfaceTension (N/m) Description: Surface tension in SI units | 
|---|
|  | Modelica.Media.Water.IF97_Utilities Compute sigma(T) at saturation T |