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

Result code in 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>
Result on the web
<a href="http://eccomas2012.conf.tuwien.ac.at/" target="_blank" >http://eccomas2012.conf.tuwien.ac.at/</a>
DOI - Digital Object Identifier
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Result language
angličtina
Original language name
BOUNDARY CONDITIONS FOR THE COMPRESSIBLE GAS FLOW AS A MODIFICATION OF THE RIEMANN PROBLEM
Original language description
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
Czech name
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Czech description
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Project
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Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year
2012
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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