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Homework Help: How to convert velocity potential from polar form to Cartesian coordinate form!

  1. Nov 6, 2011 #1
    1. The problem statement, all variables and given/known data
    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!


    2. Relevant equations



    3. 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?
     
  2. jcsd
  3. Nov 6, 2011 #2

    rude man

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    There are standard formulas for doing that, in most 2nd-year engineering course textbooks.
     
  4. Nov 7, 2011 #3
    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.
     
  5. Nov 7, 2011 #4

    rude man

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  6. Nov 23, 2011 #5
    would you mind answer this... find the polar form of 1/4i and also 1/z? please give the answer..
     
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