In the present work, an optimization methodology to compute the best control parameters, χ and Δ, for the selective frequency damping method is presented. The optimization does not suppose any a priori knowledge of the flow physics, neither of the underlying numerical methods, and is especially suited for simulations requiring large quantity of grid elements and processors. It allows for obtaining an optimal convergence rate to a steady state of the damped Navier-Stokes system. This is achieved using the Dynamic Mode Decomposition, which is a snapshot-based method, to estimate the eigenvalues associated with global unstable dynamics. Validations test cases are presented for the numerical configurations of a laminar flow past a 2D cylinder, a separated boundary-layer over a shallow bump, and a 3D turbulent stratified-Poiseuille flow.
%0 Journal Article
%1 cunha2015optimization
%A Cunha, Guilherme
%A Passaggia, Pierre-Yves
%A Lazareff, Marc
%D 2015
%I American Institute of Physics
%J Physics of Fluids
%K 76d05-incompressible-navier-stokes-equations reduced-order-modelling
%N 9
%P 094103--
%R 10.1063/1.4930925
%T Optimization of the selective frequency damping parameters using model reduction
%U https://aip.scitation.org/doi/abs/10.1063/1.4930925
%V 27
%X In the present work, an optimization methodology to compute the best control parameters, χ and Δ, for the selective frequency damping method is presented. The optimization does not suppose any a priori knowledge of the flow physics, neither of the underlying numerical methods, and is especially suited for simulations requiring large quantity of grid elements and processors. It allows for obtaining an optimal convergence rate to a steady state of the damped Navier-Stokes system. This is achieved using the Dynamic Mode Decomposition, which is a snapshot-based method, to estimate the eigenvalues associated with global unstable dynamics. Validations test cases are presented for the numerical configurations of a laminar flow past a 2D cylinder, a separated boundary-layer over a shallow bump, and a 3D turbulent stratified-Poiseuille flow.
@article{cunha2015optimization,
abstract = {In the present work, an optimization methodology to compute the best control parameters, χ and Δ, for the selective frequency damping method is presented. The optimization does not suppose any a priori knowledge of the flow physics, neither of the underlying numerical methods, and is especially suited for simulations requiring large quantity of grid elements and processors. It allows for obtaining an optimal convergence rate to a steady state of the damped Navier-Stokes system. This is achieved using the Dynamic Mode Decomposition, which is a snapshot-based method, to estimate the eigenvalues associated with global unstable dynamics. Validations test cases are presented for the numerical configurations of a laminar flow past a 2D cylinder, a separated boundary-layer over a shallow bump, and a 3D turbulent stratified-Poiseuille flow.},
added-at = {2019-10-01T07:35:37.000+0200},
author = {Cunha, Guilherme and Passaggia, Pierre-Yves and Lazareff, Marc},
biburl = {https://www.bibsonomy.org/bibtex/2098d6d483655434714494f81b9c96ec4/gdmcbain},
comment = {doi: 10.1063/1.4930925},
doi = {10.1063/1.4930925},
interhash = {8c390db2e3c639c8600bbbaa9c3237f1},
intrahash = {098d6d483655434714494f81b9c96ec4},
issn = {10706631},
journal = {Physics of Fluids},
keywords = {76d05-incompressible-navier-stokes-equations reduced-order-modelling},
month = sep,
number = 9,
pages = {094103--},
publisher = {American Institute of Physics},
timestamp = {2019-10-01T07:35:37.000+0200},
title = {Optimization of the selective frequency damping parameters using model reduction},
url = {https://aip.scitation.org/doi/abs/10.1063/1.4930925},
volume = 27,
year = 2015
}