OBSERVATIONS REGARDING COHERENCE AND CHAOS IN A MODEL OF TURBULENT BOUNDARY-LAYER - REPLY

In view of the ''observations'' of the Cornell group, reassessment of their and our models for wall-bounded turbulence has been made. Wide r anging evidence is presented for the existence and key role of propaga ting modes (streamwise dependent modes), absent in the original Cornel l model but present in some of their later models. Evidence that the h eteroclinic orbit (the bursting mechanisms) found in the original Corn ell model is most likely an artifact of their Galerkin projection is p resented. A thorough discussion detailing the physical and mathematica l soundness, as well as the universality, of our models is presented.