“…The "Rock'n'Roll" model, developed by Reeks & Hall [14], on the basis of a so-called "RRH" model developed by Reeks et al [18], is based on the assumption of a particle deposited on a rough surface which is resuspended by the airflow turbulence effect as shown in This competition between adhesion and airflow forces can be expressed by equation (8). a 2FL + rpFD>afa (8) Where, a is the distance between the two irregularities on which the particle rests and rp the particle radius. Dividing the inequality (8) by a, leads to:…”