In the field of fluid mechanics, fluid is defined[1] to be "a substance which deforms continuously under the action of a shear stress", which includes both liquids and gases.
An isentropic fluid is a fluid with a vertical or near-vertical saturation vapor curve.
References
- ↑ James R. Welty, Charles E. Wicks, Robert E. Wilson, and Gregory L. Rorrer, Fundamentals of Momentum, Heat, and Mass Transfer, 4th Ed. Toronto: John Wiley & Sons Inc, 2001.