Fluid Parcel

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Fluid Parcel </dt>
In any fluid, an imaginary portion of that fluid which for theoretical studies may be considered to have all the basic dynamic and thermodynamic properties of the fluid but which is small enough so that its motion with respect to the surrounding fluid does not induce marked compensatory movements. Also called parcel. '</dd>
'The size of the fluid parcel cannot be given precise numerical definition but it must be large enough to contain a great number of molecules and small enough so that the properties assigned to it are approximately uniform within it. [[/a>|/a> ]]</dd>

References

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