Mohammad-Reza Alam

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(46 articles) wave motion (38 articles) nanotechnology (5 articles) energy Articles on similar topics can be found in the following collections Email alerting service here the box at the top right-hand corner of the article or click Receive free email alerts when new articles cite this article-sign up in It is known that muddy seafloors can extract(More)
Wave generation due to the steady translational motion of an oscillatory disturbance in a two-layer density-stratified fluid is studied. In the context of linearized two-and three-dimensional potential flow, explicit expressions for the Green functions are derived and limiting cases discussed. Of special interest are the waves in the far field. The number(More)
Key Points: • There is a predictability time scale associated with rogue wave events • Larger rogue waves have a shorter horizon of predictability • Rogue waves are less predictable in rougher seas (due to nonlinearities) Abstract Prediction is a central goal and a yet-unresolved challenge in the investigation of oceanic rogue waves. Here we define a(More)
Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use. The MIT Faculty has made this article openly available. Please share how this access benefits you. Your story matters. We develop a direct numerical method to study the general problem of(More)
Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use. The MIT Faculty has made this article openly available. Please share how this access benefits you. Your story matters. We consider a class of higher order (quartet) Bragg resonance involving two(More)
Here we show that floating objects in stratified fluids can be cloaked against broadband incident waves by properly architecting the bottom corrugations. The presented invisibility cloaking of gravity waves is achieved utilizing a nonlinear resonance concept that occurs between surface and internal waves mediated by the bottom topography. Our cloak bends(More)
How to cite this article: Mohammad­Reza Alam (2012). A new triad resonance between co­propagating surface and interfacial waves. In a two-layer density-stratified fluid it is known, due to Ball (J. Fluid Mech., vol. 19, 1964, p. 465), that two oppositely travelling surface waves may form a triad resonance with an interfacial wave. Ball claims 'there are no(More)
We consider the indirect mechanism for dissipation of short surface waves through their near-resonant interactions with long sub-harmonic waves that are dissipated by the bottom. Using direct perturbation analysis and an energy argument, we obtain analytic predictions of the evolution of the amplitudes of two short primary waves and the long sub-harmonic(More)