Interaction Parameter

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Interaction Parameter

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In plasma physics, a measure of the relative importance of the magnetic field and the fluid motion when the magnetic lines are at least partially frozen into the fluid. It is related to the ratio of the magnetic energy density and the fluid kinetic energy. </dd>
If the interaction parameter is small, the fluid motion is hardly affected by the field; if it is large, the motion is largely controlled by the field; if it is the order of unity, the two strongly interact, with the net flow a compromise between them. </dd>

References

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