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COMSOL Multiphysics ve výuce na VUT v Brně
Kolářová, Jana ; Chmelíková, Larisa ; Kožíšek, Martin
Modelování fyzikálních polí je pro některé oblasti biomedicínského inženýrství stěžejní. Každý student elektrotechnického směru by se měl během svého studia seznámit alespoň se základními postupy návrhu simulací. Výuka simulací pomocí programového nástroje COMSOL Multiphysics se na Ústav biomedicínského inženýrství vrátila po delší odmlce díky podpoře firmy HUMUSOFT s.r.o. Kurz se nabízí jako volitelný v rámci předmětů studijních programů Fakulty elektrotechniky a komunikačních technologií a jako „svobodný předmět“ si ho mohou vybrat studenti napříč všemi fakultami VUT v Brně.
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Modelling of the Laminar/Turbulenttransition on a Heated Flat Plate Using the k-kL-w Model
Kožíšek, Martin ; Fürst, J. ; Příhoda, Jaromír
The contribution deals with the numerical simulation of the transition to turbulence on a heated flat plate by means of the k-kL-k-kL-w model of Walters and Cokljat (2008). The revised version of the three-equation model was implemented into the OpenFOAM code for the incompressible and compressible flows. Numerical simulations of the boundary-layer development were carried out according to measurements of Sohn and Reshotko (1991). The transition model was tested by means of the skin friction and the Stanton number distributions for various free-stream turbulence levels. Results were compared with empirical correlations expressing the Reynolds analogy according to Kays and Crawford (1993) and with experimental data of Pinson and Wang (2000).
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IMPLEMENTATION OF k-k(L)-omega TURBULENCE MODEL FOR COMPRESSIBLE TRANSITIONAL FLOW INTO OPENFOAM
Kožíšek, Martin ; Martinez, J. ; Fürst, J. ; Příhoda, Jaromír ; Doerffer, P.
This paper deals with the results of implementation of k-kL-ω RANS turbulence model for compressible transitional flow into OpenFOAM. This model was firstly proposed by Walters and Leylek (2005) and utilizes the approach of laminar kinetic energy in order to predict transition between laminar and turbulent flows. The capability of laminar/turbulent transition modelling is tested for the basic flat plate test cases and for the VKI turbine cascade. The comparison between new implementation, k-kL-ω for incompressible flow supplied in OpenFOAM and g−Req model from commercial CFD package FINE/Turbo distributed by NUMECA Int. are shown. The properties of the implementation of k-kL-ω model for compressible flow simulations into OpenFOAM are discussed.
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Implementation of pressure-correction algorithm with AUSM into openFOAM
Kožíšek, Martin ; Fürst, J.
This paper shows results of the project concerned with implementation of the Advection Upstream Splitting Method (AUSM) into OpenFOAM. AUSM is well suited for calculations of transonic flows. Authors have recently presented the implementation of explicit AUSM method. In this article the authors aim to improve convergence behaviour. This was achieved by treating acoustic terms implicitly following the approach proposed by Dick and Nerinckx. The system of equations became semi-implicit and the fully segregated pressure-correction algorithm was implemented. Presented numerical solutions of 2D and 3D inviscid transonic flows through a channel were obtained using explicit as well as new implicit implementation of AUSM in OpenFOAM.
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