How to convert velocity potential from polar form to Cartesian coordinate form

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SUMMARY

The discussion centers on converting the velocity potential from polar coordinates to Cartesian coordinates, specifically for the stream function ψ=9r²sin(θ). The user seeks assistance in applying standard transformation formulas typically found in engineering textbooks, such as those by Fox & McDonald. A reference link to coordinate transformations is provided, indicating the need for clarity on the conversion process and additional examples, such as finding the polar form of 1/4i and 1/z.

PREREQUISITES
  • Understanding of polar coordinates and Cartesian coordinates
  • Familiarity with stream functions and velocity potentials
  • Knowledge of coordinate transformation techniques
  • Basic proficiency in mathematical equations and trigonometric functions
NEXT STEPS
  • Study the standard formulas for converting polar coordinates to Cartesian coordinates
  • Learn about stream functions and their applications in fluid dynamics
  • Explore examples of velocity potential calculations in both coordinate systems
  • Review complex number representations in polar and Cartesian forms
USEFUL FOR

Students in engineering courses, particularly those studying fluid dynamics, mathematicians, and anyone interested in coordinate transformations and their applications in physics.

rohitgupta
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Homework Statement


Alright, here's the question, A stream function for a plane, irrotational, polar-coordinate flow is ψ=9r^2sin^θ. Find out the velocity potential in Cartesian Co-ordinate!


Homework Equations





The Attempt at a Solution


Well, I can easily find out the velocity potential in Polar co-ordinates but then how do I convert it to Cartesian Co-ordinates?
 
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There are standard formulas for doing that, in most 2nd-year engineering course textbooks.
 
Well I did try searching for it in Fox&Mcdonald(the book that I follow), I didn't find it there, maybe I have overlooked it but anyways could you please give me a link or type the formulas here.

Thank You.
 
would you mind answer this... find the polar form of 1/4i and also 1/z? please give the answer..
 

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