Surface Tension Gradient
 

Hi everybody. This days I am first time simulating Marangoni convection by using FLUENT. So I need some help. As we know FLUENT can model shear stresses caused by the variation of surface tension due to temperature. The liquid is Acetone. To increase or decrease Marangoni number I need surface tension gradient. So how to calculate or get surface tension gradient for Acetone? Thank you for answer.