Talk:Euler number (physics)

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what does a large ratio or a small ratio mean?[edit]

It would be nice to have an idea about the proportion. Intuitively, it seems that the higher the Euler number (greater pressure which is proportional to PE versus kinetic energy, the denominator) the greater the likelihood of cavitation. A statement declaring this might be useful. Perhaps even throw in some ballpark ratios that engineers go by?

key to formula[edit]

is the key to the formula wrong? it says q is the density instead of rho? if it isn't wrong, maybe an explanation? i'm on safari, maybe the rendering of the font is funny?

Is that statement correct?[edit]

"where a perfect frictionless flow corresponds to an Euler number of 1" Wouldn't a frictionless flow have no pressure loss at all and hence Eu=0?

Undefined variable in equation[edit]

The top equation is missing a definition for the variable L. It seems strange to leave that ambiguous and with no further explanation.

It does appear to be a length value, as L^2 substitutes "(area)". But unless I missed something, the meaning of "area" in this context is also not clearly defined -- I'm guessing it's some cross-sectional area within a relevant system. but at the very least I think the variable itself should be explicitly defined. Ἐγώ-ςκὀθρ (talk) 09:24, 7 January 2023 (UTC)[reply]