Numerical investigation of gas-particle flow in the primary air pipe of a low NOx swirl burner – The DEM-CFD method

Zhou, Hao; Yang, Yuyi; Wang, Lingli

doi:10.1016/j.partic.2014.04.017

Cited by 17 publications

(2 citation statements)

References 31 publications

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“…Nevertheless, the interaction among the solids is neglected in the DPM, and this model is only appropriate for dilute flows, where the dispersed second phase occupies a low volume fraction, for example, the interaction between the gas and particles in a swirl burner. 29 The DPM cannot be employed if the volume fraction of the second phase is larger than 10%, such as in the simulation of the fluidized beds. 30 For the simulation of FSI-D problems with large movement of the solids, the optimal choice is combining the computational fluid dynamics (CFD) with the discontinuous methods, for instance, the discrete element method (DEM).…”

Section: Discussionmentioning

confidence: 99%

“…To account for the discontinuity property of the solids and track the trajectory, the discrete phase method (DPM), which belongs to the Euler‐Lagrange multiphase models, has been proposed. Nevertheless, the interaction among the solids is neglected in the DPM, and this model is only appropriate for dilute flows, where the dispersed second phase occupies a low volume fraction, for example, the interaction between the gas and particles in a swirl burner . The DPM cannot be employed if the volume fraction of the second phase is larger than 10%, such as in the simulation of the fluidized beds …”

Section: Introductionmentioning

confidence: 99%

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A resolved CFDEM method for the interaction between the fluid and the discontinuous solids with large movement

Jia

Zhao

Liu

et al. 2019

Numerical Meth Engineering

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Summary A novel resolved combination of the computational fluid dynamics and the discrete element method (CFDEM) is proposed for the simulation of the strong coupling between the fluid and the discontinuous solids with large movement. The fluid flow governed by the full Navier‐Stokes equations is simulated using fixed grids based on the Eulerian framework, whereas the motion of the discontinuous solids is modeled by the discrete element method using the Lagrangian description. The key challenge, namely, the representation of the moving interfaces between the fluid and the solids in different frameworks, is handled by the immersed boundary method. Meanwhile, the governing equations of the coupled system are solved by the partitioned method in an iterative way to achieve a strong coupling effect. The breakthrough of the proposed resolved CFDEM method lies in the calculation of the fluid flow in fixed grids with high resolution, along with an accurate simulation of the interaction between the fluid and the discontinuous solids with arbitrary shapes and large movement. The reliability and the accuracy of the new method are validated by calculating several well‐known benchmark examples. Good agreements are achieved between the present and the known results.

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Section: Discussionmentioning

confidence: 99%