Bernoulli's Principle and Joule-Thompson expansion contradiction? AskEngineers

Although it arises from a great simplification of the Navier-Stokes equations, Bernoulli's principle results in fluid travelling faster having lower pressure. Thus, points in a fluid's pipe with greater cross-sectional area experience higher pressure. In the case of say, a refrigerator, the fluid undergoes J-T expansion, which causes it to cool. However, this takes place in a part of the fluid's flow with a larger cross sectional area, meaning there should be higher pressure, not lower pressure (?). How is this done such that it doesn't exactly contradict Bernoulli's principle? Or are more terms of Navier-Stokes required in this case?

Submitted February 28, 2016 at 09:06AM by lepriccon22 http://ift.tt/1n6qRcR AskEngineers