A post-combustion carbon-capture system utilizing a bubbling fluidized bed of sorbent particles is currently being developed as a part of the Carbon Capture and Simulation Initiative (CCSI) efforts. Adsorption of carbon dioxide (CO2) by these amine based sorbent particles is exothermic and arrays of immersed cylindrical heat transfer tubes are often utilized to maintain the lower temperatures favorable for CO2 capture. In multiphase computational fluid dynamics (CFD) simulations of the full-scale devices, which can be up to 10 m in size, approximately 103 cells are required in each dimension to accurately resolve the cylindrical tubes, which are only a few centimeters in diameter. Since the tubes cannot be resolved explicitly in CFD simulations, alternate methods to account for the influence of these immersed objects need to be developed.
Revised: July 30, 2014 |
Published: December 1, 2012
Citation
Sarkar A., X. Sun, and S. Sundaresan. 2012.A Sub-grid Model for an Array of Immersed Cylinders in Coarse-grid Multiphase Flow Simulations of a Carbon Capture Device. In American Institute of Chemical Engineers (AIChE) 2012 Annual Meeting: Cleaner Energy, Stronger Economy, Better Living, October 28-November 2, 2013, Pittsburgh, Pennsylvania, Paper No. 572c. New York:American Institute of Chemical Engineers.PNNL-SA-87779.