7-26 Recall from Chap. 4 that the volumetric strain rate is zero for a steady incompressible flow. In Cartesian coordi-

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7 26 Recall From Chap 4 That The Volumetric Strain Rate Is Zero For A Steady Incompressible Flow In Cartesian Coordi 1 (55.62 KiB) Viewed 31 times

7-26 Recall from Chap. 4 that the volumetric strain rate is zero for a steady incompressible flow. In Cartesian coordi- nates we express this as du du ди + + = 0 dx ду dz Suppose the characteristic speed and characteristic length for a given flow field are V and L, respectively (Fig. P7-26). Define the following dimensionless variables, y Z = = " z* L L L u W U* = and w* = V V V Nondimensionalize the equation, and identify any established (named) dimensionless parameters that may appear. Discuss. V L FIGURE P7-26 " =