Date of download: 10/17/2017 Copyright © ASME. All rights reserved. From: Ventilation of Lifting Bodies: Review of the Physics and Discussion of Scaling Effects Appl. Mech. Rev. 2017;69(1):010801-010801-38. doi:10.1115/1.4035360 Figure Legend: A schematic illustration of 2D cavity pulsation in the absence of gravitational effects. The case shown is the time-evolution of a two-wavelength mode of pulsation behind a ventilated wedge. Here, λ is the wavelength on the cavity interface; lm and lM, respectively, denote the minimum and maximum cavity lengths; and T is the pulsation period. (Reprinted with permission from Michel [94]. Copyright 1984 by American Society of Mechanical Engineers.)