2019 AIChE Annual Meeting
(133g) Sub-Grid Deconvolution Approach for Filtered Two-Fluid Models and the Application to Fluidized Beds
Author
This ADM-TFM approach is implemented in an a-posteriori manner for the coarse grid simulation of a fluidized bed of Geldart type B particles and is verified against highly-resolved TFM simulations. Furthermore, different regularization methods, which account for the sub-filter scale (SFS) contribution, are presented and discussed with respect to their predictiveness and stability. It is shown that employing an appropriate rheological model for the solid phase considerably improves stability without removing too much energy from the resolved scales. The ADM-TFM predictions are in fairly good agreement with the fine grid reference case and do not show a notable grid-dependency. Compared to TFM simulations using the same grid resolution, the ADM-TFM approach does only require marginally more computational resources [5].Finally, the application to the coarse-grid simulation of large-scale fluidized beds is discussed.
References:
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