000003642 001__ 3642
000003642 005__ 20141118153352.0
000003642 04107 $$acze
000003642 046__ $$k2013-05-13
000003642 100__ $$aKyncl, M.
000003642 24500 $$aTHE ANALYSIS OF THE BOUNDARY CONDITIONS FOR THE COMPRESSIBLE GAS FLOW AS A MODIFICATION OF THE RIEMANN PROBLEM

000003642 24630 $$n19.$$pEngineering Mechanics 2013
000003642 260__ $$bInstitute of Thermomechanics AS CR, v.v.i., Praha
000003642 506__ $$arestricted
000003642 520__ $$2eng$$aThe correct design of the boundary conditions plays an important role in the computational fluid dynamics (CFD). We present a special construction of the boundary conditions in order to match the experimental data. We work with the system of equations describing non-stationary compressible turbulent fluid flow (2D,3D), i.e. the Reynolds-Averaged Navier-Stokes (RANS) equations, and we focus on the numerical solution of these equations and on the boundary conditions. The boundary values (for the density, velocity, pressure) must satisfy the considered system of equations. Many boundary conditions (i.e. fixed, linearized) don’t satisfy this eligible demand, and bring non-physical errors into the solution, slow down convergent process, and may even ruin the solution in the whole domain. In our general approach we seek the boundary values as the solution of the incomplete initial-value problem complemented with various given data. This approach can be used within various methods in CFD.

000003642 540__ $$aText je chráněný podle autorského zákona č. 121/2000 Sb.
000003642 653__ $$acompressible gas flow, the Riemann problem, boundary conditions

000003642 7112_ $$aEngineering Mechanics 2013$$cSvratka (CZ)$$d2013-05-13 / 2013-05-16$$gEM2013
000003642 720__ $$aKyncl, M.$$iPelant, J.
000003642 8560_ $$ffischerc@itam.cas.cz
000003642 8564_ $$s934751$$uhttps://invenio.itam.cas.cz/record/3642/files/020_Kyncl_M-FT.pdf$$y
             Original version of the author's contribution as presented on CD, FLU.
            
000003642 962__ $$r3632
000003642 980__ $$aPAPER