docs: def turbulent_von_Karman(Re, Pr, fd):
      r'''Calculates internal convection Nusselt number for turbulent flows
      in pipe according to [2]_ as in [1]_.
  
      .. math::
          Nu = \frac{(f/8)Re Pr}{1 + 5(f/8)^{0.5}\left[Pr-1+\ln\left(\frac{5Pr+1}
          {6}\right)\right]}
  
      Parameters
      ----------
      Re : float
          Reynolds number, [-]
      Pr : float
          Prandtl number, [-]
      fd : float
          Darcy friction factor [-]
  
      Returns
      -------
      Nu : float
          Nusselt number, [-]
  
      Notes
      -----
      Range according to [1]_ is 0.5 ≤ Pr ≤ 3  and 10^4 ≤ Re ≤ 10^5.
  
      Examples
      --------
      >>> turbulent_von_Karman(Re=1E5, Pr=1.2, fd=0.0185)
      255.7243541243272
  
      References
      ----------
      .. [1] Rohsenow, Warren and James Hartnett and Young Cho. Handbook of Heat
         Transfer, 3E. New York: McGraw-Hill, 1998.
      .. [2] T. von Karman, "The Analogy Between Fluid Friction and Heat
         Transfer," Trans. ASME, (61):705-710,1939.
      '''
      return fd/8.*Re*Pr/(1 + 5*(fd/8.)**0.5*(Pr - 1 + log((5*Pr + 1)/6.)))