Chapter
Apr 26, 2012
The Effect of Wave Action on Gravity Currents
Authors: Tristan Robinson [email protected], Ian Eames [email protected], and Richard Simons [email protected]Author Affiliations
Publication: Coastal Dynamics 2005: State of the Practice
Abstract
A laboratory study of the effect of wave action on turbulent gravity currents generated by an instantaneous release of dense fluid is described. Dense fluid is released in the centre of the flume, generating a gravity current propagating horizontally with two fronts. This gravity current type, in the absence of waves, spreads symmetrically and propagating with the length scales according to the standard box models. In the presence of gravity waves the length of the gravity current is, to leading order unchanged, but the centre is advected in the direction of the wave motion. The shear of the mean flow generated by the oscillatory wave motion modifies the shape of the gravity current, inducing an asymmetry in the current height.
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© 2006 American Society of Civil Engineers.
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Published online: Apr 26, 2012
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Department of Civil and Environmental Engineering (CEE), University College London (UCL), WC1E 6BT. E-mail: [email protected]
Department of Mechanical Engineering, UCL, Torrington Place, WC1E 7JE. E-mail: [email protected]
CEE/UCL. E-mail: [email protected]
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