Rayleigh number
From CFD-Wiki
(Difference between revisions)
m (Rayleigh Number moved to Rayleigh number) |
|||
Line 6: | Line 6: | ||
</math> | </math> | ||
- | where <math>g =</math> acceleration due to [[gravity]] | + | where <math>g =</math> acceleration due to [[gravity]], |
- | <math>\alpha =</math> [[coefficient of thermal expansion]] | + | <math>\alpha =</math> [[coefficient of thermal expansion]], |
- | <math>\Gamma =</math> background [[temperature]] [[gradient]] | + | <math>\Gamma =</math> background [[temperature]] [[gradient]], |
- | <math>d =</math> length scale of flow | + | <math>d =</math> length scale of flow, |
- | <math>\nu =</math> [[kinematic viscosity]] | + | <math>\nu =</math> [[kinematic viscosity]] and |
<math>\kappa =</math> [[thermal diffusivity]] | <math>\kappa =</math> [[thermal diffusivity]] |
Latest revision as of 03:40, 21 September 2005
The Rayleigh number is the ratio of the buoyancy force to the viscous force in a medium.
where acceleration due to gravity, coefficient of thermal expansion, background temperature gradient, length scale of flow, kinematic viscosity and thermal diffusivity