def calc_doublelayer_dielectric_capacitance(eps_fluid, lamb, Cdl):
    """
    Total capacitance due to Debye layer and surface capacitance (Stern layer or dielectric coating)
    units: F/m^2
    Notes:
        Adjari, 2006    -   "The overall capacitance per unit area in the Debye-Huckel limit"
    Inputs:
        eps_fluid   =   permittivity of the fluid                   (F/m)
        lamb        =   Debye length                                (m)
        Cdl         =   Capacitance due to Stern/dielectric layer   (F/m^2)
    """
    C_total_Adjari = (1/(1+(eps_fluid/lamb/Cdl)))*(eps_fluid/lamb)
    return C_total_Adjari