Concept explainers
In an oscillating incompressible flow field the force per unit mass acting on a fluid particle is obtained from Newton's second law in intensive form (see Prob. 7-19),
Suppose the characteristic speed and characteristic length for a given flow field are
Since there is no given characteristic scale for the force per unit mass acting on a fluid panicle, we assign one, noting that
Nondimensionalize the equation of motion and identify any established (named) dimensionless parameters that may ippear.
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Fluid Mechanics: Fundamentals and Applications
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