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Dilute Riser Flow

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Falling clusters in the near-wall region

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+ Circulating fluidized beds (CFBs) span a wide range of operating ranges throughout + their subsystems. The riser section is typically characterized by dilute transport. + Here, a 1.8 m section (~9M particles) of a pilot-scale CFB riser at + PSRI is modeled, just 1/10th of the physical + system's length. As high speed (15 m/s) gas flow drives the verically, denser than + average (1%) regions can form at (or migrate to) the wall and actually fall against + the mean flow. This phenomena can be observed on the right in the video while a + streamer climbes slowly on the left. We note that the domain is too small as the + streamer has interacted with its periodic image. Future work will simulate the full + 18 m lenght of the riser. + Simulated by MFiX-Exa develop (git hash ef171c9d) using 24 GPUs on NETL's Joule2 HPC. + The animation rendered with Blender. +

+ + Animation courtesy of Justin Weber & William D. Fullmer, + NETL, Morgantown WV. + +

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Boyce Single Bubble

Qualitative Benchmarking: Single bubble injection

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Animation courtesy William D. Fullmer, - Multiphase Flow Science Group, - NETL, Morgantown WV. + NETL, Morgantown WV.

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Animation courtesy of William D. Fullmer, - Multiphase Flow Science Group, - NETL, Morgantown WV. + NETL, Morgantown WV.

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Animation courtesy of Justin Weber & William D. Fullmer, - Multiphase Flow Science Group, - NETL, Morgantown WV. + NETL, Morgantown WV.

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Animation courtesy of William D. Fullmer, - Multiphase Flow Science Group, - NETL, Morgantown WV. + NETL, Morgantown WV.