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  • We work with the system of equations describing non-stationary inviscid compressible fluid flow in 3D, i.e. the Euler equations, and we focus on the numerical solution of these equations and on the boundary conditions. In particular, we choose the implicit finite volume method. 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 boundary conditions 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. Our method for the construction of the boundary conditions is robust and its use accelerates the solver convergence to the desired solution. As a part of this work we present own-developed software for the solution of the 3D Euler equations, using the implicit method.
  • We work with the system of equations describing non-stationary inviscid compressible fluid flow in 3D, i.e. the Euler equations, and we focus on the numerical solution of these equations and on the boundary conditions. In particular, we choose the implicit finite volume method. 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 boundary conditions 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. Our method for the construction of the boundary conditions is robust and its use accelerates the solver convergence to the desired solution. As a part of this work we present own-developed software for the solution of the 3D Euler equations, using the implicit method. (en)
Title
  • C3DEEI
  • C3DEEI (en)
skos:prefLabel
  • C3DEEI
  • C3DEEI (en)
skos:notation
  • RIV/00010669:_____/12:#0001503!RIV13-MPO-00010669
http://linked.open...avai/riv/aktivita
http://linked.open...avai/riv/aktivity
  • I
http://linked.open...vai/riv/dodaniDat
http://linked.open...aciTvurceVysledku
http://linked.open.../riv/druhVysledku
http://linked.open...iv/duvernostUdaju
http://linked.open...onomickeParametry
  • Urychlení výpočtů o cca 80%, širší obsah řešených úloh o cca 50%, snížení nároků na výpočetní čas.
http://linked.open...titaPredkladatele
http://linked.open...dnocenehoVysledku
  • 129507
http://linked.open...ai/riv/idVysledku
  • RIV/00010669:_____/12:#0001503
http://linked.open...terniIdentifikace
  • R-5375
http://linked.open...riv/jazykVysledku
http://linked.open.../riv/klicovaSlova
  • compressible gas flow; boundary conditions; finite volume method; implicit method (en)
http://linked.open.../riv/klicoveSlovo
http://linked.open...ontrolniKodProRIV
  • [9AD259080342]
http://linked.open...in/vavai/riv/obor
http://linked.open...ichTvurcuVysledku
http://linked.open...cetTvurcuVysledku
http://linked.open...UplatneniVysledku
http://linked.open...echnickeParametry
  • Prostředí: Linux Vstup: konfigurační soubor se sítí aproximující studovanou oblast, soubor s počáteční podmínkou (tlak,hustota,rychlost), soubor s nastavením použité metody a s okrajovými podmínkami. Výstup: textový soubor s hodnotami v jednotlivých buňkách sítě.
http://linked.open...iv/tvurceVysledku
  • Kyncl, Martin
  • Pelant, Jaroslav
http://linked.open...avai/riv/vlastnik
http://linked.open...itiJinymSubjektem
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