How to find viscosity at different concentration (e.g. 0.1%, 0.5%, 1%) of Al2O3-water based mixture, actually I am computing thermal performance of a heat exchanger using inserts inside the tube and i want to use Al2O3-water based mixture as working fluid inside tube. But when i am creating new fluid Al2O3-water mixture in fluid database then what value of viscosity given to that ?