Using ASM modeling, primary phase is water-liquid, the secondary phase is not in its datebase, so I have to creat one new material in liquid category,according to fluent's help documents, "If your model includes a particulate phase, you will need to create a new material for it in the fluid materials category (not the solid materials category),and you will need to specify just the density." what about its viscosity? leave unchanged? Thanks a lot!

but if you leave its viscosity blank,fluent will "the viscosity ratio is beyond 1e5"