# 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