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- W2146754619 abstract "The contribution presents our approach to numerical modelling of processes in a combustion engine and its present situation. The modelling was motivated by the aim of computation of production of nitrogen oxides during the work cycle of such engine. There are the models of o w of compressible gas, heat and mass transport, and chemical reactions and their connection presented here. The model of o w is made by solution of Navier-Stokes and compressible continuity equations by the nite element method. Transport problem is described by the advection equation and the energy equation; both are solved applying the nite volume method. Chemical reactions are modelled locally in each nite volume. All three models use the same mesh in each time step; the mesh is changing in time. 1. Introduction. The main motivation of working on the model is a task of modelling of production of nitrogen oxides in a gas combustion engine. We decided to develop a complete model of relevant physical and chemical processes and compute the nitrogen oxide production as an outcome from it. The task was divided into three main problems: o w, mass and heat transport, and chemical reactions. Each of them was modelled separately. The models are solved in a cycle and outputs from one model form inputs to another one. In the paper, a brief description of the three models is set, the algorithm of the computation is shown and a short summary of the rst calibration computations is presented. The model is not able to compute the nitrogen oxide production, yet. The present program assumes gas fuel, it does not model diusion and turbulent processes and it has many other limitations. The calibration shows that the global behaviour of the model is good and we are optimistic in our prognoses of its future capabilities." @default.
- W2146754619 created "2016-06-24" @default.
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- W2146754619 date "2002-01-01" @default.
- W2146754619 modified "2023-09-27" @default.
- W2146754619 title "DISCUSSION ON NUMERICAL MODELLING OF PHYSICAL PROCESSES IN A COMBUSTION ENGINE" @default.
- W2146754619 hasPublicationYear "2002" @default.
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