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- Sailing on Natural Convection —When a homogeneous fluid is heated (or cooled) at an inclined surface, a boundary-layer flow develops along the surface that is driven by buoyancy effects due to the change of density with temperature. We have designed a triangular wedge immersed in a fluid with one of his boundaries being a heated plate, and showed that this macroscopic object moves at a constant speed when heating is on. We also predict the speed of the wedge by balancing the drag with the propulsion force obtained by the analytical description of the boundary-layer laminar flow. This effect has potentially widespread application to topics as diverse as bioengineering, microfluidics and geosciences. A detailed report of this study has been published in Physical Review Letters. [read more "Sailing on Natural Convection"]
- Large–scale, realistic laboratory modeling of Luzon Strait — We have realized a large scale experimental study of internal tide generation by complex 3D topography, giving insight into the origin of internal solitary waves in the South China Sea.
Our laboratory study modeling the Luzon Strait, and realized at the Coriolis turntable (Grenoble), the world's largest rotating table for GFD experiments, have demonstrated that despite having a complex three-dimensional geometry, the Luzon Strait radiates in the South China Sea a coherent, mode-1 dominated, weakly nonlinear M2 internal tide oriented in a west-northwest direction, which is prone to steepening. [read more "Luzon Strait"]
- Topographic scattering of the low-mode internal tide in the deep ocean — We investigate the role of deep-ocean topography in scattering energy from the large spatial scales of the low-mode internal tide to the smaller spatial scales of higher modes. The complete Green function method, which is not subject to the restrictions of the WKB approximation, is used for the first time to study the two-dimensional scattering of a mode-1 internal tide incident on subcritical and supercritical topography of any form in arbitrary stratifications. A significant finding is that compared to large extents of small-amplitude, rough topography a single large topographic feature along the path of a mode-1 internal tide plays the dominant role in scattering the internal tide. A detailed report of this study has been published in the Journal of Geophysical Research: Oceans. [read more "Topographic Scattering"]
- Internal wave transmission paper — Congratulations to Sasan Ghaemsaidi, Thomas Peacock and our collaborators for their latest paper: “The impact of multiple layering on internal wave transmission” by S. J. Ghaemsaidi, H. V. Dosser, L. Rainville, and T. Peacock.
- New group members — Welcome to Spencer Wilson, Matthew Cavuto and Sarah Fay, our new group members for Spring 2015! Spencer, Matthew and Sarah are undergraduate researchers and seniors at MIT MechE. Spencer Wilson will be investigating the effect of boundary flows on the evolution of wave fields from two to three-dimensions. Matthew Cavuto will be working on a pumping mechanism to fill non-uniform density stratifications. Sarah Fay is doing her senior thesis with the ENDlab working on Lagrangian Coherent Structures.
- Maha's Master's — Congratulations to Maha Haji who completed her Master’s thesis in February 2015, in which she investigated the topographic scattering of low-mode internal tides! [read more]
- APS DFD 2014 — In November 2014, Prof. Peacock, S. Ghaemsaidi, M. Haji, S. Atis and M. Filippi attended the American Physical Society, Division Of Fluid Dynamics meeting in San Francisco. [read more “APS Presentations”]
- USA Today internal waves article — Prof. Peacock was interviewed for USA Today's recent article, "Underwater waves are the Earth's 'lumbering giants.'" The article highlights the importance of studying internal waves and their impacts on climate change, and mentiones the work being done at the ENDLab to study them experimentally.
- New group member — Welcome to Severine Atis, our new group member for 2014/2015! Severine has joined us from Université Pierre et Marie Curie as a postdoc.
- Internal tide scattering paper published — Research work done on internal tide scattering by Prof. Peacock in collaboration with Prof. Manikandan Mathur from IIT-Madras, Prof. Glenn Carter from Univeristy of Hawai'i at Manoa titled "Topographic scattering of the low-mode internal tide in the deep ocean" has recently been published in the Journal of Geophysical Research: Oceans.
- Sailing on natural convection paper published — Research done by former ENDLab members Matthieu Mercier, Arezoo Ardekani, Michael Allshouse, Brian Doyle, and Prof. Peacock on the sailing on natural convection titled "Self-Propulsion of Immersed Objects via Natural Convection" has recently been published in Physical Review Letters.
- NSF Artic Grant Funded — Prof. Peacock and his research group will be implementing a theoretical, experimental, and computational approach to studying the propagation of internal waves in the Arctic environment. This effort will seek to assess the transmission characteristics and potential instabilities of the internal wave dynamics taking place in this environmentally sensitive region.
- APS-IUSSTF India Visitation Award — Congratulations to ENDLab member Sasan Ghaemsaidi who has been awarded the APS-IUSSTF India visitation award! Sasan will be studying the passage of internal waves in the Arctic through the ocean’s complex density stratification, and the existence of instabilities in collaboration with Prof. Manikandan Mathur at IIT-Madras. This award will help establish a firm academic relationship between MIT and IIT-Madras.
- Taiwan research cruise — In February 2014, Matthieu Leclair took part in a research cruise off the coast of Taiwan as part of the Sub-mesoscale Cascade of the South China Sea research project.
- Zaim Ouazzani — Congratulations to ENDLab member Zaim Ouazzani whose poster won the Gallery of Fluid Motion award at the 2013 APS DFD meeting in Pittsburg!
- Surfing the Glory — The morning glory cloud is a spectacular atmospheric internal wave that occurs in northern Australia around September and October. Prof. Peacock joined a team involving Prof. Jorg Hacker at Flinders University who made the first airborne measurements. Check out the photos on the news page. [read more “Surfing the Glory”]