Hey everybody! Im new to this forum and im seeking some help. I have recently started to work on my master thesis. The subject is 'Modeling of viscosity of ionic liquids in binary mixtures with organic solvents'. Im using few predictive and correlative methods (e.g. 3 and 4 body McAllister, Grundberg-Nissan, Seddon, Eyring-UNIQUAC, Eyring-NRTL and UNIFAC-VISCO). I should make or modify an existing program written using Fortran77. So far, im having problem with writing program for NRTL and UNIFAC-VISCO. I found some written in microsoft excel but they're all for activity coefficient and not viscosity. I would be grateful if someone could help me! Cheers!