Talk:Prandtl–Glauert transformation: Difference between revisions

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Physics: Fluid Dynamics Start‑class Low‑importance

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This is derived from linearizing the compressible, inviscid potential flow equations. As such, I believe their is also a condition on the flow being irrotational. Iron_Engineer (talk) 06:01, 2 July 2009 (UTC)[reply]

Why is it the absolute value of (1-M²) instead of just (M²-1)? (I'd Sign, but I don't have a wiki account, just a curious person) —Preceding unsigned comment added by 130.18.116.244 (talk) 05:32, 17 August 2009 (UTC)[reply]

The article says that the singularity is used to describe phenomena near sonic speed - I assume this means used in a "high school physics" type manner of incompletely describing the linear components of certain phenomena and just ignoring the non-linear components. I would think one of these might be describing supersonic shockwaves - although I have no experience with aerodynamics at all - hence my muddled attempt in the last sentence.. But examples of phenomena are "explained" in this way would be nice. I also wonder if anyone has wondered (however theoretically) about whether this transformation shares some conceptual basis with the Lorentz transformation from relativity and the phenomenon of Cherenkov radiation?

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 Why is it the absolute value of (1-M<sup>2</sup>) instead of just (M<sup>2</sup>-1)?
 (I'd Sign, but I don't have a wiki account, just a curious person)  <span style="font-size: smaller;" class="autosigned">—Preceding [[Wikipedia:Signatures|unsigned]] comment added by [[Special:Contributions/130.18.116.244|130.18.116.244]] ([[User talk:130.18.116.244|talk]]) 05:32, 17 August 2009 (UTC)</span><!-- Template:UnsignedIP --> <!--Autosigned by SineBot-->
+The article says that the singularity is used to describe phenomena near sonic speed - I assume this means used in a "high school physics" type manner of incompletely describing the linear components of certain phenomena and just ignoring the non-linear components.  I would think one of these might be describing supersonic shockwaves - although I have no experience with aerodynamics at all - hence my muddled attempt in the last sentence..  But examples of phenomena are "explained" in this way would be nice.  I also wonder if anyone has wondered (however theoretically) about whether this transformation shares some conceptual basis with the Lorentz transformation from relativity and the phenomenon of Cherenkov radiation?