Prandtl number

[prahn-tl]

Prandtl number

[prahn-tl]
noun Physics, Thermodynamics.
the ratio of the fluid viscosity to the thermal conductivity of a substance, a low number indicating high convection.

Origin:
1930–35; named after Ludwig Prandtl (1875–1953), German physicist
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Prandtl number is always a great word to know.
So is magic number. Does it mean:
the atomic number or neutron number of an exceptionally stable nuclide
the removal of energy or particles from a beam by the medium through which the beam propagates
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