Numerical simulation and verification of flow characteristics of asphalt-based spherical activated carbon gas-solid fluidized bed
The hydrodynamic behavior of a gas-solid fluidization bed of asphalt-based spherical activated carbon is numerically simulated and experimentally verified in conjunction with particle flow dynamics theory.The hydrodynamic properties of two-dimensional gas-solid fluidized beds were investigated using the computational fluid dynamics software ANSYS Fluent.A multi-fluid Eulerian model is used to analyze the simulation results of five traction models,numerical parameters,inlet velocity,bed pressure drop,and expansion height by comparing cold-mode tests.It is shown that the numerical calculation parameters of the gas-solid fluidized beds under the Syamlal-O'Brien model are best simulated using a second-order discrete format with a time step of 0.000 1 s and a convergence criterion of 10-3.The ideal speed for bed operation is between 0.35 and 0.45 m·s-1 when the particles in the bed are fluidized.The experimental and simulated results for bed pressure drop and expansion height are verified to be in good agreement.
gas-solid fluidized bedspherical activated carbonnumerical simulationdrag force modelflow characteristics
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