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Quasi-geostrophic jet-like flow with obstructions

Published online by Cambridge University Press:  28 June 2021

Michele Mossa Open the ORCID record for Michele Mossa [Opens in a new window] ,
Roni H. Goldshmid Open the ORCID record for Roni H. Goldshmid [Opens in a new window] ,
Dan Liberzon Open the ORCID record for Dan Liberzon [Opens in a new window] ,
M. Eletta Negretti Open the ORCID record for M. Eletta Negretti [Opens in a new window] ,
Joel Sommeria Open the ORCID record for Joel Sommeria [Opens in a new window] ,
Donatella Termini Open the ORCID record for Donatella Termini [Opens in a new window]  and
Francesca De Serio Open the ORCID record for Francesca De Serio [Opens in a new window]
Michele Mossa
Affiliation:
DICATECh, Polytechnic University of Bari, 70125Bari, Italy CoNISMa, 00196Rome, Italy
Roni H. Goldshmid
Affiliation:
Faculty of Civil and Environmental Engineering, The Technion, 32000Haifa, Israel
Dan Liberzon
Affiliation:
Faculty of Civil and Environmental Engineering, The Technion, 32000Haifa, Israel
M. Eletta Negretti
Affiliation:
Univ. Grenoble Alpes, CNRS, Grenoble INP, LEGI, 38000Grenoble, France
Joel Sommeria
Affiliation:
Univ. Grenoble Alpes, CNRS, Grenoble INP, LEGI, 38000Grenoble, France
Donatella Termini
Affiliation:
Department of Engineering, University of Palermo, 90133Palermo, Italy
Francesca De Serio*
Affiliation:
DICATECh, Polytechnic University of Bari, 70125Bari, Italy CoNISMa, 00196Rome, Italy
*
†Email address for correspondence: francesca.deserio@poliba.it
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Abstract

Jet-like flows are ubiquitous in the atmosphere and oceans, and thus a thorough investigation of their behaviour in rotating systems is fundamental. Nevertheless, how they are affected by vegetation or, generally speaking, by obstructions is a crucial aspect which has been poorly investigated up to now. The aim of the present paper is to propose an analytical model developed for jet-like flows in the presence of both obstructions and the Coriolis force. In this investigation the jet-like flow is assumed homogeneous, turbulent and quasi-geostrophic, and with the same density as the surrounding fluid. Laws of momentum deficit, length scales, velocity scales and jet centreline are analytically deduced. These analytical solutions are compared with some experimental data obtained using the Coriolis rotating platform at LEGI-Grenoble (France), showing a good agreement.

JFM classification

Wakes/Jets: Jets Geophysical and Geological Flows: Coastal engineering
Type
JFM Papers
Information
Journal of Fluid Mechanics , Volume 921 , 25 August 2021 , A12
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Copyright
© The Author(s), 2021. Published by Cambridge University Press

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