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The quantitative study of how fluids (gases and liquids) move.

3 votes
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Stagnation pressure on an accelerating surface

The expression for stagnation pressure is derived directly from Bernoulli's principle. Let's go through the derivation of Bernoulli's principle to understand the assumptions involved. Consider a pipe …
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7 votes
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Importance of speed of sound in astrophysical flows

'Speed of sound' is the maximum rate of propagation of density (or pressure) disturbances in a medium. Imagine some solid body travelling through a fluid at a supersonic speed. As mentioned above, t …
thunderbolt's user avatar
0 votes
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Understanding the notion of lose or win of angular momentum in accretion disk

An object with an angular momentum $L$ with respect to the central object tends to follow a circular orbit with a Keplerian angular frequency $\Omega$ such that the gravitational attraction is balanc …
thunderbolt's user avatar