Boussinesq Approximation

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Boussinesq Approximation

The assumption (frequently used in the theory of convection) that the fluid is incompressible except insofar as the thermal expansion produces a buoyancy, represented by a term gaT (a is equivalent to alpha), where g is the acceleration of gravity; a is the coefficient of thermal expansion; and T is the perturbationtemperature.

References

This article is based on NASA's Dictionary of Technical Terms for Aerospace Use