유체역학-차원해석에 대해 설명하시오.(영문본)
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유체역학-차원해석에 대해 설명하시오.
목차
Chapter 4
DIMENSIONAL ANALYSIS AND DYNAMIC SIMILITUDE
4.1 DIMENSIONAL HOMOGENEITY AND DIMENSIONLESS RATIOS
4.2 DIMENSIONS AND UNITS
4.3 THE Π THEOREM
4.4 DISCUSSION OF DIMENSIONLESS PARAMETERS
4.5 SIMILITUDE; MODEL STUDIES
본문내용
Dimensionless parameters significantly deepen our understanding of fluid-flow phenomena in a way which is analogous to the case of a hydraulic jack, where the ratio of piston diameters determines the mechanical advantage, a dimensionless number which is independent or the overall size of the jack. They permit limited experimental results to be applied to situations involving different physical dimensions and often different fluid properties. The concepts of dimensional analysis introduced in this chapter plus an understanding of the mechanics of the type of flow under study make possible this generalization of experimental data. The consequence of such generalization is manifold, since one is now able to describe the phenomenon in its entirety and is not restricted to discussing the specialized experiment that was performed. Thus, it is possible to conduct fewer, although highly selective, experiments to uncover the hidden facets of the problem and thereby achieve important savings in time and money. The results of an investigation can also be presented to other engineers and scientists in a more compact and meaningful way to facilitate their use. Equally important is the fact that,
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