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Forum: OpenFOAM Programming & Development

May 5, 2020, 14:09

Replies: 9

Writing Integral with Bessel Function

Views: 1,267

Posted By CFD_10

You can use your favorite numerical integration...

You can use your favorite numerical integration method to compute that integral (Simpson, Romberg, Gauss quadratures, etc.).

You have:

J_{ze} = \int_0^\infty{f\left(\lambda; \cdots\right)...

Forum: OpenFOAM Programming & Development

May 5, 2020, 07:16

Replies: 9

Writing Integral with Bessel Function

Views: 1,267

Posted By CFD_10

My guess is that \lambda is an eigenvalue of the...

My guess is that \lambda is an eigenvalue of the Laplacian operator. In this case, it looks like it has dimension of 1/length.

But I think you don't have to care about it since it is just an...

Forum: OpenFOAM Programming & Development

May 4, 2020, 15:30

Replies: 9

Writing Integral with Bessel Function

Views: 1,267

Posted By CFD_10

What is the reference of that equation?

What is the reference of that equation?

Forum: OpenFOAM Programming & Development

April 30, 2020, 12:10

Replies: 9

Writing Integral with Bessel Function

Views: 1,267

Posted By CFD_10

Try the following: Foam::jn(0, s) ...

Try the following:

Foam::jn(0, s)
Foam::jn(1, s)

// or
Foam::j0(s)
Foam::j1(s)

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