A large-eddy simulation (LES) of a buoyant plume past a bluff body is performed. A round heat source is placed at the center of a horizontal flat wall, and a bluff body in the shape of a thick round plate is floating right above the heat source. The modified Rayleigh number based on the total heat input is set at 1.2×1010. On the basis of past studies, the Smagorinsky model is adopted as a subgrid-scale (SGS) model, and a partial slip boundary condition based on the wall law is applied to a horizontal flat wall and a disk surface. The validity of numerical results is ascertained by comparison with theoretical solution and experimental data. The blocking of upward flow and imparting turbulence through a bluff body vary the process of developing a buoyant plume, while properties of a fully developed plume rarely vary. With heat from a bluff body, another buoyant plume is formed near the center, piled with upward flow passing around the bluff body. Moreover, main positions of buoyant production of turbulent kinetic energy move a point from near the side of the bluff body to a point near the central axis. This affects the transition to a fully developed plume in turbulence statistics.
- Heat Transfer Division
Large-Eddy Simulation of a Buoyant Plume Past a Bluff Body
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Suto, H, & Hattori, Y. "Large-Eddy Simulation of a Buoyant Plume Past a Bluff Body." Proceedings of the 2010 14th International Heat Transfer Conference. 2010 14th International Heat Transfer Conference, Volume 1. Washington, DC, USA. August 8–13, 2010. pp. 885-892. ASME. https://doi.org/10.1115/IHTC14-22761
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