Instabilities developed in stratified flows over pronounced obstacles

J. Varela; M. Araújo; I. Bove; C. Cabeza; G. Usera; Arturo C. Martí; R. Montagne; L. G. Sarasúa

doi:10.1016/j.physa.2007.08.051

Instabilities developed in stratified flows over pronounced obstacles

J. Varela, M. Araújo, I. Bove, C. Cabeza^*, G. Usera, Arturo C. Martí, R. Montagne, L. G. Sarasúa

^*Corresponding author for this work

School of Biology

Research output: Contribution to journal › Article › peer-review

Abstract

In the present work we study numerical and experimentally the flow of a two-layer stratified fluid over a topographic obstacle. The problem reflects a wide number of oceanographic and meteorological situations, where the stratification plays an important role. We identify the different instabilities developed by studying the pycnocline deformation due to a pronounced obstacle. The numerical simulations were made using the model caffa3D.MB which works with a numerical model of Navier-Stokes equations with finite volume elements in curvilinear meshes. The experimental results are contrasted with numerical simulations. Linear stability analysis predictions are checked with particle image velocimetry (PIV) measurements.

Original language	English
Pages (from-to)	681-685
Number of pages	5
Journal	Physica A: Statistical Mechanics and its Applications
Volume	386
Issue number	2
DOIs	https://doi.org/10.1016/j.physa.2007.08.051
Publication status	Published - 15 Dec 2007

Keywords

PIV
Shear flows
Stratified flows

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10.1016/j.physa.2007.08.051

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title = "Instabilities developed in stratified flows over pronounced obstacles",

abstract = "In the present work we study numerical and experimentally the flow of a two-layer stratified fluid over a topographic obstacle. The problem reflects a wide number of oceanographic and meteorological situations, where the stratification plays an important role. We identify the different instabilities developed by studying the pycnocline deformation due to a pronounced obstacle. The numerical simulations were made using the model caffa3D.MB which works with a numerical model of Navier-Stokes equations with finite volume elements in curvilinear meshes. The experimental results are contrasted with numerical simulations. Linear stability analysis predictions are checked with particle image velocimetry (PIV) measurements.",

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year = "2007",

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T1 - Instabilities developed in stratified flows over pronounced obstacles

AU - Varela, J.

AU - Araújo, M.

AU - Bove, I.

AU - Cabeza, C.

AU - Usera, G.

AU - Martí, Arturo C.

AU - Montagne, R.

AU - Sarasúa, L. G.

PY - 2007/12/15

Y1 - 2007/12/15

N2 - In the present work we study numerical and experimentally the flow of a two-layer stratified fluid over a topographic obstacle. The problem reflects a wide number of oceanographic and meteorological situations, where the stratification plays an important role. We identify the different instabilities developed by studying the pycnocline deformation due to a pronounced obstacle. The numerical simulations were made using the model caffa3D.MB which works with a numerical model of Navier-Stokes equations with finite volume elements in curvilinear meshes. The experimental results are contrasted with numerical simulations. Linear stability analysis predictions are checked with particle image velocimetry (PIV) measurements.

AB - In the present work we study numerical and experimentally the flow of a two-layer stratified fluid over a topographic obstacle. The problem reflects a wide number of oceanographic and meteorological situations, where the stratification plays an important role. We identify the different instabilities developed by studying the pycnocline deformation due to a pronounced obstacle. The numerical simulations were made using the model caffa3D.MB which works with a numerical model of Navier-Stokes equations with finite volume elements in curvilinear meshes. The experimental results are contrasted with numerical simulations. Linear stability analysis predictions are checked with particle image velocimetry (PIV) measurements.

KW - PIV

KW - Shear flows

KW - Stratified flows

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DO - 10.1016/j.physa.2007.08.051

M3 - Article

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SP - 681

EP - 685

JO - Physica A: Statistical Mechanics and its Applications

JF - Physica A: Statistical Mechanics and its Applications

IS - 2

ER -

Instabilities developed in stratified flows over pronounced obstacles

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Keywords

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