ON THE SENSITIVITY OF THE NONLINEAR TERM IN THE OUTFLOW BOUNDARY CONDITION

ON THE SENSITIVITY OF THE NONLINEAR TERM IN THE OUTFLOW BOUNDARY CONDITION

This paper studies the artificial outflow boundary condition for the Navier-Stokes system. This type of condition is widely used and it is therefore very important to study its influence on a numerical solution of the corresponding boundary-value problem. We particularly focus on the role of the coe...

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Main Authors: Tomáš Neustupa, Ondřej Winter
Format: Article
Language:English
Published: CTU Central Library 2021-02-01
Series:Acta Polytechnica
Subjects:
navier-stokes equations
natural outlet boundary condition
finite volume method
Online Access:https://ojs.cvut.cz/ojs/index.php/ap/article/view/6149
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spelling doaj-7116cc2579d24f2c93f2c8e8938dba8a2021-02-27T21:07:50ZengCTU Central LibraryActa Polytechnica1210-27091805-23632021-02-0161SI11712110.14311/AP.2021.61.01173336ON THE SENSITIVITY OF THE NONLINEAR TERM IN THE OUTFLOW BOUNDARY CONDITIONTomáš Neustupa0Ondřej Winter1Czech Technical University in Prague, Faculty of Mechanical Engineering, Karlovo nám. 13, 121 35 Praha 2, Czech RepublicCzech Technical University in Prague, Faculty of Mechanical Engineering, Karlovo nám. 13, 121 35 Praha 2, Czech RepublicThis paper studies the artificial outflow boundary condition for the Navier-Stokes system. This type of condition is widely used and it is therefore very important to study its influence on a numerical solution of the corresponding boundary-value problem. We particularly focus on the role of the coefficient in front of the nonlinear term in the boundary condition on the outflow. The influence of this term is examined numerically, comparing the obtained results in a close neighbourhood of the outflow. The numerical experiment is carried out for a fluid flow through the channel with so called sudden extension. Presented numerical results are obtained by means of the OpenFOAM toolbox. They confirm that the kinetic energy of the flow in the channel can be controlled by means of the proposed boundary condition.https://ojs.cvut.cz/ojs/index.php/ap/article/view/6149navier-stokes equationsnatural outlet boundary conditionfinite volume method
collection DOAJ
language English
format Article
sources DOAJ
author Tomáš Neustupa
Ondřej Winter
spellingShingle Tomáš Neustupa
Ondřej Winter
ON THE SENSITIVITY OF THE NONLINEAR TERM IN THE OUTFLOW BOUNDARY CONDITION
Acta Polytechnica
navier-stokes equations
natural outlet boundary condition
finite volume method
author_facet Tomáš Neustupa
Ondřej Winter
author_sort Tomáš Neustupa
title ON THE SENSITIVITY OF THE NONLINEAR TERM IN THE OUTFLOW BOUNDARY CONDITION
title_short ON THE SENSITIVITY OF THE NONLINEAR TERM IN THE OUTFLOW BOUNDARY CONDITION
title_full ON THE SENSITIVITY OF THE NONLINEAR TERM IN THE OUTFLOW BOUNDARY CONDITION
title_fullStr ON THE SENSITIVITY OF THE NONLINEAR TERM IN THE OUTFLOW BOUNDARY CONDITION
title_full_unstemmed ON THE SENSITIVITY OF THE NONLINEAR TERM IN THE OUTFLOW BOUNDARY CONDITION
title_sort on the sensitivity of the nonlinear term in the outflow boundary condition
publisher CTU Central Library
series Acta Polytechnica
issn 1210-2709
1805-2363
publishDate 2021-02-01
description This paper studies the artificial outflow boundary condition for the Navier-Stokes system. This type of condition is widely used and it is therefore very important to study its influence on a numerical solution of the corresponding boundary-value problem. We particularly focus on the role of the coefficient in front of the nonlinear term in the boundary condition on the outflow. The influence of this term is examined numerically, comparing the obtained results in a close neighbourhood of the outflow. The numerical experiment is carried out for a fluid flow through the channel with so called sudden extension. Presented numerical results are obtained by means of the OpenFOAM toolbox. They confirm that the kinetic energy of the flow in the channel can be controlled by means of the proposed boundary condition.
topic navier-stokes equations
natural outlet boundary condition
finite volume method
url https://ojs.cvut.cz/ojs/index.php/ap/article/view/6149
work_keys_str_mv AT tomasneustupa onthesensitivityofthenonlineartermintheoutflowboundarycondition
AT ondrejwinter onthesensitivityofthenonlineartermintheoutflowboundarycondition
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