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.
- type k
np.array
- returns
Value of Theodorsen’s function evaluated at the desired reduced frequencies.
- rtype
np.array