def solidsDistribution(delta, emf, umf, ub, fw):
    """
    Calculates the distribution of solids in the bubble, cloud/wake, and
    emulsion phases using K/L eqs. 6.35-6.37.

    Parameters
    ----------
    delta : float
        Volume fraction of gas in the bubbles [-]
    emf : float
        Void fraction at minimum fluidization [-]
    umf : float
        Minimum fluidization velocity [m/s]
    ub : float
        Bubble rise velocity [m/s]
    fw : float
        Ratio of the wake volume to the bubble volume [-]

    Note
    ----
    gamma_b is for the moment a hard-coded constant. See K/L eq. 6.37.

    Returns
    -------
    gamma_b : float
        Volume of solids in the bubble divided by the bubble volume
    gamma_c : float
        Volume of solids in the cloud/wake divided by the bubble volume
    gamma_e : float
        Volume of solids in the emulsion divided by the bubble volume
    """
    gamma_b = 0.005
    gamma_c = (1.0 - emf) * (3.0 / (ub * float(emf) / umf - 1.0) + fw)
    gamma_e = (1.0 - emf) * (1.0 - delta) / delta - gamma_b - gamma_c
    return gamma_b, gamma_c, gamma_e
