[ASBR]

Hello everyone, I'm trying to insert an expression to calculate viscosity in ANSYS Fluent, but the expression isn't working. I've made several attempts, but I keep getting error messages like 'name 'z' is not defined' or 'invalid syntax'. Could somebody help me with this? I alredy see the ansys help manual.

(1.7894*10^-5*(2-(z/0.5[m])^2))*1[kg/m/s]
(1.7894*10^-5*(2-(z./0.5[m])^2))*1[kg/m/s]

(1.7894*10^-5*(2-(z/0.5[m])^2))*1[kg m^-1 s^-1]
(1.7894*10^-5*(2-(z./0.5[m])^2))*1[kg m^-1 s^-1]

thanks.