238 Large Eddy Simulation of a Mixing Tee Junction, Wall Jet type configuration

概要

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In the context of a collaboration between JNC and CEA, we focus on turbulent thermal hydraulic flows in mixing tee geometries which are widely used in nuclear technology. Both experimental and numerical simulations where performed. In this preliminary work, we compare numerical results obtained by the TRIO_U/PRICELES code with measurements obtained at JNC (see [1]). PRICELES is the module from CEA's R & D platteform for thermal hydraulic (TRIO_U) dedicated to Large Eddy Simulation for incompressible flows (see [2]). It's a parallel application dealing with either structured (MAC like) or unstructured (Finite Volume Element) grids (see [3,4]). In this first simulation we used an about one million cells structured grid and a selective structure function subgrid-scale model (see [5]). As a first stage, a mixing tee configuration with small buoyancy force and a main pipe velocity 1.46 times higher than the branch pipe one has been selected. The velocity and temperature fields obtained by the LES computation shows good agrement both for the mean and rms values with the measured ones. An unstructured mesh computation using a new finite volume element method (see [6]) is now planned.
社団法人日本機械学会の論文
2003-11-22