Partial Differential Equations in Two or More Dimensions

The absolute stream velocity in the x direction Vx is related to the system velocity Vsx and the stream velocity relative to the system Vrx by the relation. Vx = Vsx + Vrx. The analysis for a system moving with a constant velocity will be simplified if a momentum balance is applied to a control volume moving with the system velocity. Example 5.4-6 ................
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