Al . showed that for steel alloys the critical Rayleigh number is 17.
2.
The mushy zone Rayleigh number is defined as:
3.
They showed that thermomagnetic convection can be correlated with a dimensionless magnetic Rayleigh number.
4.
The Rayleigh number ( Ra ) is the product of the Grashof and Prandtl numbers.
5.
Inserting these substitutions produces a Rayleigh number that can be used to predict thermal convection.
6.
A-segregates are predicted to form when the Rayleigh number exceeds a certain critical value.
7.
Critical Rayleigh numbers for lead tin and nickel-based super-alloys were also developed.
8.
The onset of instability in these flows is best described as an electric " Rayleigh number ".
9.
As the heat flow is increased, above a critical value of the Rayleigh number, the system undergoes a Boussinesq convection.
10.
When the flow is turbulent different correlations involving the Rayleigh Number ( a function of both the Grashof Number and the Prandtl Number ) must be used.
