theo_fun¶
Returns the value of Theodorsen’s function at a reduced frequency \(k\).
\[\mathcal{C}(jk) = \frac{H_1^{(2)}(k)}{H_1^{(2)}(k) + jH_0^{(2)}(k)}\]
where \(H_0^{(2)}(k)\) and \(H_1^{(2)}(k)\) are Hankel functions of the second kind.
param k: | Reduced frequency/frequencies at which to evaluate the function. |
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type k: | np.array |
returns: | Value of Theodorsen’s function evaluated at the desired reduced frequencies. |
rtype: | np.array |