Národní úložiště šedé literatury Nalezeno 2 záznamů.  Hledání trvalo 0.00 vteřin. 
Modification of an algebraic bypass-transition model for internal flows
Straka, P. ; Příhoda, Jaromír
The contribution deals with testing of an algebraic bypass-transition model for shear flows characteristic for turbomachinery. The transition model based on the algebraic equation for the intermittency coefficient is added to the averaged Navier-Stokes equations with the SST turbulence model. The transition onset and length are given by empirical relations. The modified model considers different intermittency coefficient in the transitional boundary layer and in the outer turbulent stream. The model was verified by means of test cases ERCOFTAC covering boundary-layer flow with various free-stream turbulence and pressure gradient.
Numerical solution of flow over 2D backward facing step with different inclination angle
Louda, P. ; Sváček, P. ; Kozel, K. ; Příhoda, Jaromír
The finite-volume and finite-element techniques are used for the numerical simulation of the incompressible turbulent flows in a closed channel with a backward-facing step and with an inclined step under the angle 45 degree. A comparison of the finite-volume method based on the averaged Navier-Stokes equations closed by the explicit algebraic Reynolds stress model and the finite-element method using the Navier-Stokes equations with the two-equation k-eps model is presented. Numerical results are compared with experimental data of Makiola (1992).

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