inertial instability

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inertial instability [i′nər·shəl ‚in·stə′bil·əd·ē]

(fluid mechanics)

Generally, instability in which the only form of energy transferred between the steady state and the disturbance in the fluid is kinetic energy.

The hydrodynamic instability arising in a rotating fluid mass when the velocity distribution is such that the kinetic energy of a disturbance grows at the expense of kinetic energy of the rotation. Also known as dynamic instability.

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