Introduction of small velocity and pressure variation into a stationary compressible fluid (Q1199317)

A generalized theory is presented to deal with the propagation of small disturbances caused by a distributed system of both vortices and variation in specific entropy of a thermodynamically simple compressible fluid. The results suggest the possibility of using a focused laser spot to simulate the effect of source in a compressible fluid, the source may even move at supersonic speed to create a shock wave. Further, a time dependent three-dimensional formula for lifts caused by small disturbances is in agreement with Blasius' formula for two dimensional time-dependent inviscid flows.