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SDSS-IV MaNGA: Spatially resolved star formation in barred galaxies

Fraser-McKelvie, Amelia; Aragón-Salamanca, Alfonso; Merrifield, Michael; Masters, Karen; Nair, Preethi; Emsellem, Eric; Kraljic, Katarina; Krishnarao, Dhanesh; Andrews, Brett H; Drory, Niv; Neumann, Justus

Authors

Amelia Fraser-McKelvie

Karen Masters

Preethi Nair

Eric Emsellem

Katarina Kraljic

Dhanesh Krishnarao

Brett H Andrews

Niv Drory

Justus Neumann



Abstract

A novel wave-energy device is presented. Both a preliminary proof-of-principle of a working, scaled laboratory version of the energy device is shown as well as the derivation and analysis of a comprehensive mathematical and numerical model of the new device. The wave-energy device includes a convergence in which the waves are amplified, a constrained wave buoy with a (curved) mast and direct energy conversion of the buoy motion into electrical power via an electro-magnetic generator. The device is designed for use in breakwaters and it is possible to be taken out of action during severe weather. The new design is a deconstruction of elements of existing wave-energy devices, such as the TapChan, IP wave-buoy and the Berkeley Wedge, put together in a different manner to enhance energy conversion and, hence, efficiency. The idea of wave-focusing in a contraction emerged from our work on creating and simulating rogue waves in crossing seas, including a “bore-soliton-splash”. Such crossing seas have been recreated and modelled in the laboratory and in simulations by using a geometric channel convergence. The mathematical and numerical modelling is also novel. One monolithic variational principle governs the dynamics including the combined (potential-flow) hydrodynamics, the buoy motion and the power generation, to which the dissipative elements such as the electrical resistance of the circuits, coils and loads have been added a posteriori. The numerical model is a direct and consistent discretisation of this comprehensive variational principle. Preliminary numerical calculations are shown for the case of linearised dynamics; optimisation of efficiency is a target of future work.

Citation

Fraser-McKelvie, A., Aragón-Salamanca, A., Merrifield, M., Masters, K., Nair, P., Emsellem, E., …Neumann, J. (2020). SDSS-IV MaNGA: Spatially resolved star formation in barred galaxies. Monthly Notices of the Royal Astronomical Society, https://doi.org/10.1093/mnras/staa1416

Journal Article Type Article
Acceptance Date May 17, 2020
Online Publication Date May 22, 2020
Publication Date May 22, 2020
Deposit Date May 27, 2020
Publicly Available Date May 27, 2020
Journal Monthly Notices of the Royal Astronomical Society
Print ISSN 0035-8711
Electronic ISSN 1365-2966
Publisher Oxford University Press
Peer Reviewed Peer Reviewed
DOI https://doi.org/10.1093/mnras/staa1416
Keywords Space and Planetary Science; Astronomy and Astrophysics
Public URL https://nottingham-repository.worktribe.com/output/4517623
Publisher URL https://academic.oup.com/mnras/advance-article/doi/10.1093/mnras/staa1416/5841943

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Copyright Statement
This article has been accepted for publication in Monthly Notices of the Royal Astronomical Society ©2020. Published by Oxford University Press on behalf of the Royal Astronomical Society. All rights reserved.





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