- A dimensionless parameter that is a measure of the instability of a layer of fluid due to differences of temperature and density at the top and bottom.More example sentences
- By the mid-twentieth century, geophysicists had determined that the Earth's mantle was likely to advect heat from the core, because its Rayleigh number far exceeds the convective threshold.
- Further, Honda et al. assume constant viscosity, which is an important element of the Rayleigh number.
More definitions of Rayleigh numberDefinition of Rayleigh number in:
- The US English dictionary