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In [[fluid dynamics]] the '''Milne-Thomson circle theorem''' or the '''circle theorem''' is a statement giving a new [[stream function]] for a fluid flow when a cylinder is placed into that flow.<ref>{{cite book|last=Batchelor|first=George Keith|authorlink=George Batchelor|title=An Introduction to Fluid Dynamics|url=http://books.google.co.in/books?id=Rla7OihRvUgC&dq=an+introduction+to+fluid+dynamics&printsec=frontcover&source=bn&hl=en&ei=m8OMTLuiAZm0cNzclcME&sa=X&oi=book_result&ct=result&resnum=4&ved=0CCEQ6AEwAw#v=onepage&q&f=false|year=1967|publisher=[[Cambridge University Press]]|isbn=0-521-66396-2|page=422}}</ref><ref>{{cite book|last=Raisinghania|first=M.D.|title=Fluid Dynamics|url=http://books.google.com.au/books?id=wq3TU5tArTkC&lpg=PA211&ots=yThvgwi8Rv&dq=milne%20thomson%20circle%20theorem&pg=PA211#v=onepage&q=milne%20thomson%20circle%20theorem&f=false}}</ref> It was named after the [[United Kingdom|English]] mathematician [[L. M. Milne-Thomson]]. | |||
Let <math>w = f(z)</math> be the complex [[stream function]] for a fluid flow with no rigid boundaries and no [[Mathematical singularity|singularities]] within <math>|z| = a</math>. If a circular cylinder <math>|z| = a</math> is placed into that flow, the complex potential for the new flow is given by: | |||
: <math>w = f(z) + \bar{f}\left( \frac{a^2}{\bar{z}} \right)</math> | |||
== See also == | |||
* [[Potential flow]] | |||
* [[Conformal mapping]] | |||
* [[Velocity potential]] | |||
== References == | |||
{{Reflist}} | |||
==External links== | |||
[[Category:Fluid mechanics]] | |||
[[Category:Fluid dynamics]] | |||
[[Category:Equations of fluid dynamics]] | |||
Revision as of 11:09, 17 October 2013
In fluid dynamics the Milne-Thomson circle theorem or the circle theorem is a statement giving a new stream function for a fluid flow when a cylinder is placed into that flow.[1][2] It was named after the English mathematician L. M. Milne-Thomson.
Let be the complex stream function for a fluid flow with no rigid boundaries and no singularities within . If a circular cylinder is placed into that flow, the complex potential for the new flow is given by:
See also
References
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