The Rayleigh number is a product of Grashof number and Prandtl number.
It can be seen as the ratio of the buoyancy forces and the product of the thermal and momentum diffusivity.
The Rayleigh number is a product of Grashof number and Prandtl number.
It can be seen as the ratio of the buoyancy forces and the product of the thermal and momentum diffusivity.