BOUNDARY CONDITIONS FOR THE COMPRESSIBLE GAS FLOW AS A MODIFICATION OF THE RIEMANN PROBLEM

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00010669%3A_____%2F12%3A%230001513" target="_blank" >RIV/00010669:_____/12:#0001513 - isvavai.cz</a>

Výsledek na webu

<a href="http://eccomas2012.conf.tuwien.ac.at/" target="_blank" >http://eccomas2012.conf.tuwien.ac.at/</a>

DOI - Digital Object Identifier

—

Jazyk výsledku

angličtina

Název v původním jazyce

BOUNDARY CONDITIONS FOR THE COMPRESSIBLE GAS FLOW AS A MODIFICATION OF THE RIEMANN PROBLEM

Popis výsledku v původním jazyce

We work with the system of equations describing non-stationary compressible fluid flow (2D,3D), i.e. the Euler equations, the Navier-Stokes (NS) equations, and we focus on the numerical solution of these equations and on the boundary conditions. Many boundary conditions (i.e. fixed, linearized) bring non-physical errors into the solution, slowing down the convergent process, or even ruining the solution in the whole domain. We use the analysis of the Riemann problem for the construction of the boundaryconditions in order to match the experimental data. We show, that the unknown one-side initial condition for the local Riemann problem can be partially replaced by the suitable complementary condition. We suggest such complementary conditions (by preference of pressure, velocity, total quantities,...) giving physically relevant data. Algorithms were coded and used within our own developed code for the solution of the Euler, NS, and the RANS equations. Numerical examples show superior beh

Název v anglickém jazyce

BOUNDARY CONDITIONS FOR THE COMPRESSIBLE GAS FLOW AS A MODIFICATION OF THE RIEMANN PROBLEM

Popis výsledku anglicky

We work with the system of equations describing non-stationary compressible fluid flow (2D,3D), i.e. the Euler equations, the Navier-Stokes (NS) equations, and we focus on the numerical solution of these equations and on the boundary conditions. Many boundary conditions (i.e. fixed, linearized) bring non-physical errors into the solution, slowing down the convergent process, or even ruining the solution in the whole domain. We use the analysis of the Riemann problem for the construction of the boundaryconditions in order to match the experimental data. We show, that the unknown one-side initial condition for the local Riemann problem can be partially replaced by the suitable complementary condition. We suggest such complementary conditions (by preference of pressure, velocity, total quantities,...) giving physically relevant data. Algorithms were coded and used within our own developed code for the solution of the Euler, NS, and the RANS equations. Numerical examples show superior beh

Druh

D - Stať ve sborníku

CEP obor

JU - Aeronautika, aerodynamika, letadla

OECD FORD obor

—

Projekt

—

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2012

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název statě ve sborníku

ECCOMAS 2012

ISBN

978-3-9502481-8-0

ISSN

—

e-ISSN

—

Počet stran výsledku

17

Strana od-do

—

Název nakladatele

Grafisches Zentrum an der TU Wien, www.grafischeszentrum.com

Místo vydání

Wien

Místo konání akce

Wien, Austria

Datum konání akce

10. 9. 2012

Typ akce podle státní příslušnosti

WRD - Celosvětová akce

Kód UT WoS článku

—