I am modeling mixture of gases that flow in heated circular channel. The inlet gas mixture flow at 300 K, and the mixture passes heated zone at 100k. I found these equations to calculate Re & Gr #
Re = rau(ref). vel(in). D(inlet)/miu (ref)
Gr= g. rau(ref)^2.D^3.[Ts-Tin]/miu (ref)^2. T(ref)
where rau=density; vel=inlet velocity; D=inlet diameter; miu= viscosity ; g=gravitational acceleration ; Ts=1000k; Tin=300k
my question is how can I get Re & Gr using Fluent, also how can I get the viscosity at the reference temperature.
Thanks in advance