Towards a New Turbulence Model Based on Lagrangian Flows, Reduced Order Models, and Global-Local Approximations

Although the Navier-Stokes equations represent correctly both, laminar fluid flows as well as turbulent ones, the current power of the computers does not allow solving the latter without making empirical approximations that make the results are only predictable within the same margins from which the...

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Detalles Bibliográficos
Autor principal: Idelsohn, Sergio R.
Formato: Objeto de conferencia Resumen
Lenguaje:Inglés
Publicado: 2017
Materias:
Ingeniería
Turbulence model
Lagrangian Flows
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/94112
https://cimec.org.ar/ojs/index.php/mc/article/view/5227
Aporte de:
SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-94112
record_format dspace
institution Universidad Nacional de La Plata
institution_str I-19
repository_str R-120
collection SEDICI (UNLP)
language Inglés
topic Ingeniería
Turbulence model
Lagrangian Flows
spellingShingle Ingeniería
Turbulence model
Lagrangian Flows
Idelsohn, Sergio R.
Towards a New Turbulence Model Based on Lagrangian Flows, Reduced Order Models, and Global-Local Approximations
topic_facet Ingeniería
Turbulence model
Lagrangian Flows
description Although the Navier-Stokes equations represent correctly both, laminar fluid flows as well as turbulent ones, the current power of the computers does not allow solving the latter without making empirical approximations that make the results are only predictable within the same margins from which the empirical approximation was realized. Taking into account that the vast majority of fluid flows that must be simulated by the industries are indeed of a turbulent nature, this makes it worthwhile to continue improving the models so that they fit more and more with the physicsmathematic equations. The current project in which we are working is in that sense. Based on previous work, we are proposing a new turbulence model that fits more with the physic and can be solved in one of the current computer. Always within the multi-scale models, in which all the turbulence model are based, the new idea consists in: a) treating the macro-scale with lagrangian particles, which convect and diffuse the turbulence; b) solving the micro-scale as a problem of unstable laminar fluid flow subjected to velocity gradients; c) applying a Reduction Order Model (ROM) to the micro-scale; d) going from the microscale to the macro-scale as in a Global-Local Model with a ROM.
format Objeto de conferencia
Resumen
author Idelsohn, Sergio R.
author_facet Idelsohn, Sergio R.
author_sort Idelsohn, Sergio R.
title Towards a New Turbulence Model Based on Lagrangian Flows, Reduced Order Models, and Global-Local Approximations
title_short Towards a New Turbulence Model Based on Lagrangian Flows, Reduced Order Models, and Global-Local Approximations
title_full Towards a New Turbulence Model Based on Lagrangian Flows, Reduced Order Models, and Global-Local Approximations
title_fullStr Towards a New Turbulence Model Based on Lagrangian Flows, Reduced Order Models, and Global-Local Approximations
title_full_unstemmed Towards a New Turbulence Model Based on Lagrangian Flows, Reduced Order Models, and Global-Local Approximations
title_sort towards a new turbulence model based on lagrangian flows, reduced order models, and global-local approximations
publishDate 2017
url http://sedici.unlp.edu.ar/handle/10915/94112
https://cimec.org.ar/ojs/index.php/mc/article/view/5227
work_keys_str_mv AT idelsohnsergior towardsanewturbulencemodelbasedonlagrangianflowsreducedordermodelsandgloballocalapproximations
bdutipo_str Repositorios
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