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Re: [Phys-l] question about Bernoulli



Agreed! Without dissipation, one should expect to get perpetual oscillations between regions that have velocity/density/pressure values that are above and below the equilibrium, steady flow values.

John Mallinckrodt
Cal Poly Pomona

Bernard Cleyet wrote:

The examples of which I know of relaxation depend on dissipation. Is such occurring here, and, if so, what is the microscopic behavior.

John Mallinckrodt wrote:

Depending on the size of the pipe and the speed of sound, the process of equilibration may take very little time or quite a long time, but eventually the pressure arranges itself self-consistently in order for the flow to become steady.