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![]() The starting point for all problems is a “geometry.” How do we measure quality of a grid or mesh? The purpose of meshing is to decompose the solution domain into an appropriate number of locations for an accurate result Review on Fluid Flow Description Principlesįor both CFD (Fluid modeling) and FEA ( Finite Element Analysis - Solid modeling) we need to perform the calculations upon discrete locations in the domain The potential objectives of the research include The calculation of the instantaneous rate of production using CHEMKIN with the temperature, pressure and species concentration in each cell simulated using CFD View full-text Peak temperatures and occurrence times during the propagation process will be predicted. This coupling allows a detailed analysis of the turbulent flame structure and species formation. Main characteristics, spray penetration depth, ignition delay time, and flame lift-off length, will be compared to measured values. extensive set of igniting n-heptane liquid sprays will be performed and compared with experiments (engine combustion). LES is a spatial average of turbulence pulsation, that is, the large-scale vortex and small-scale vortex are separated through some kind of filter functions, and the large-scale vortex is simulated directly, and the small-scale vortex is simulated by using sub-models. View full-textĭetailed chemical kinetics is planned to be coupled with Large-Eddy Simulations (LES) of diesel spray combustion. The CFX-10 results for the three benchmark problems are in close agreement with these solutions, so it is concluded that the CFX-10 with a DTM radiation model can be applied to the CANDU fuel channel analysis where a surface radiation heat transfer is a dominant mode of the heat transfer. For the solutions of the benchmark problems, the temperature or the net radiation heat flux boundary conditions are prescribed for each radiating surface to determine the radiation heat transfer rate or the surface temperature, respectively by using the network method.The Discrete Transfer Model (DTM) is used for the CFX-10 radiation model and its calculation results are compared with the solutions of the benchmark problems. fuel channel configurations from a simple geometry to a whole fuel channel geometry. These three benchmark problems are representative of the CANDU. ![]() ![]() ![]() To justify the use of a commercial Computational Fluid Dynamics (CFD) code for a CANDU fuel channel analysis, especially for the radiation heat transfer dominant conditions, the CFX-10 code is tested against three benchmark problems which were used for the validation of a radiation heat transfer in the CANDU analysis code, a CATHENA. ![]()
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