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kmohamed1-Visitor
1-Visitor
March 30, 2017
Question

How could i solve this equation numerically if the Phi value is dependent on Theta?

have a problem in solving a numerical double integration, two variables dependent on each other, the boundary for one of them is known, but the other is not.

tried to sole it in mathcad but i think that there is an error in inputs, or how to put it in mathcad in the right mannerPTC+mathcad.png

7 replies

LucMeekes23-Emerald V
23-Emerald V
March 30, 2017

Did you just want these:

and

Or also values in between:

with:

plots as:

Sucess!

Luc

Careful, attached file is in Prime 4, you need prime 4 to read it!

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    kmohamed1-VisitorAuthor
    1-Visitor
    March 30, 2017

    thanks for your kindly reply

    but i need a single value depend on theta and phi

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    Fred_Kohlhepp23-Emerald I
    23-Emerald I
    March 30, 2017

    I think the attached file does what you want.

    Your integral evaluates to a single value.

    File is Prime 3.0

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      kmohamed1-VisitorAuthor
      1-Visitor
      March 30, 2017

      thanks Mr.Fred

      but why you replace phi in the equation by s, the value of this equation is unit-less, my target is not to calculate phi, but a unit-less value depend on both theta and phi, so is that possible?

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      Fred_Kohlhepp23-Emerald I
      23-Emerald I
      March 31, 2017

      "s" is a variable of integration.

      Attached file has a bit of explanation, I hope it helps.

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