September 6, 2019 at 12:26 pmnaadaSubscriberII would like to ask how can I get the volumetric thermal expansion for compressible ideal gas?. The density will be varying due to temperature and pressure can I consider it as (1/T)?
September 6, 2019 at 1:34 pmRobAnsys Employee
Ideal gas uses the ideal gas law: not sure why you need an expansion coefficient?
September 6, 2019 at 1:40 pmnaadaSubscriberI’m working in natural convection I need it to get the Rayleigh number:
September 9, 2019 at 2:04 pmRobAnsys Employee
Probably not unreasonable https://en.wikipedia.org/wiki/Rayleigh_number Not sure I've ever calculated Ra for a domain.
September 11, 2019 at 7:57 amDrAmineAnsys Employee
Yes the expansion coefficient for ideal gas is 1/T if you assume isobaric condition which is not always true. I guess for the whole domain you need to get an average value of T so that you get an average of the thermal expansion coefficient
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