Spectral proper orthogonal decomposition of flow around a disk in homogeneous and stratified fluids
S Nidhan, K Chongsiripinyo… - APS Division of Fluid …, 2019 - ui.adsabs.harvard.edu
The eduction of coherent structures and quantification of their role is a cornerstone of
research in turbulent flows. Proper orthogonal decomposition (POD) introduced by Lumley
to turbulent flows is a technique which can be used to identify the coherent structures that
optimally capture the fluctuation kinetic energy of the flow. In this study, a space-time variant
of POD, namely spectral POD (SPOD) is used to study the dynamics of the wake behind a
disk at Re= 50, 000. Two cases, a stratified flow with Fr= U/ND= 2 that evolves into a regime …
research in turbulent flows. Proper orthogonal decomposition (POD) introduced by Lumley
to turbulent flows is a technique which can be used to identify the coherent structures that
optimally capture the fluctuation kinetic energy of the flow. In this study, a space-time variant
of POD, namely spectral POD (SPOD) is used to study the dynamics of the wake behind a
disk at Re= 50, 000. Two cases, a stratified flow with Fr= U/ND= 2 that evolves into a regime …