Large-eddy Simulation of Single Phase Turbulent Flows in Cyclones
نویسندگان
چکیده
A Large-Eddy Simulation (LES) of a single-phase turbulent flow in model cyclone geometry was performed. The computational code utilized is a dedicated type of code which incorporates the finite volume method using SIMPLE algorithm on unstructured three-dimensional computational grid. The standard Smagorinsky sub-grid scale model, including Van Driest wall damping function, and Yakhot’s RNG sub-grid model were applied. The simulation was performed at a moderated Reynolds number, and the results for average axial and tangential velocities as well as RMS velocities in these directions show consistent agreement when compared with experimental ones. The large-scale structures were visualized, and revealed important features of this high unstable and anisotropic flow. This LES simulation was run on a PC on a reasonable time frame, suggesting that the application of this accurate methodology is affordable in an industry environment for designing and optimizing cyclones.
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