CFD-DEM

The CFD-DEM model, or Computational Fluid Dynamics / Discrete Element Method model, is a process used to model or simulate systems combining fluids with solids or particles. In CFD-DEM, the motion of discrete solids or particles phase is obtained by the Discrete Element Method (DEM) which applies Newton's laws of motion to every particle, while the flow of continuum fluid is described by the local averaged Navier–Stokes equations that can be solved using the traditional Computational Fluid Dynamics (CFD) approach. The interactions between the fluid phase and solids phase is modeled by use of Newton's third law.

The direct incorporation of CFD into DEM to study the gas fluidization process so far has been attempted by Tsuji et al.[1][2] and most recently by Hoomans et al.,[3] Deb et al.[4] and Peng et al.[5] A recent overview over fields of application was given by Kieckhefen et al.[6]

  1. ^ Tsuji, Y.; Kawaguchi, T.; Tanaka, T. (1993). "Discrete particle simulation of two-dimensional fluidized bed". Powder Technology. 77 (1). Elsevier BV: 79–87. doi:10.1016/0032-5910(93)85010-7. ISSN 0032-5910.
  2. ^ Tsuji, Y.; Tanaka, T.; Ishida, T. (1992). "Lagrangian numerical simulation of plug flow of cohesionless particles in a horizontal pipe". Powder Technology. 71 (3). Elsevier BV: 239–250. doi:10.1016/0032-5910(92)88030-l. ISSN 0032-5910.
  3. ^ Hoomans, B.P.B.; Kuipers, J.A.M.; Briels, W.J.; van Swaaij, W.P.M. (1996). "Discrete particle simulation of bubble and slug formation in a two-dimensional gas-fluidised bed: A hard-sphere approach". Chemical Engineering Science. 51 (1). Elsevier BV: 99–118. doi:10.1016/0009-2509(95)00271-5. ISSN 0009-2509. S2CID 17460834.
  4. ^ Deb, Surya; Tafti, Danesh (2014). "Investigation of flat bottomed spouted bed with multiple jets using DEM–CFD framework". Powder Technology. 254. Elsevier BV: 387–402. doi:10.1016/j.powtec.2014.01.045. ISSN 0032-5910.
  5. ^ Peng, Z.; Doroodchi, E.; Luo, C.; Moghtaderi, B. (2014). "Influence of void fraction calculation on fidelity of CFD-DEM simulation of gas-solid bubbling fluidized beds". AIChE J. 60 (6): 2000. doi:10.1002/aic.14421.
  6. ^ Kieckhefen, P.; Pietsch, S.; Dosta, M.; Heinrich, S. (2020). "Possibilities and Limits of Computational Fluid Dynamics–Discrete Element Method Simulations in Process Engineering: A Review of Recent Advancements and Future Trends". Annual Review of Chemical and Biomolecular Engineering. 11: 397–422. doi:10.1146/annurev-chembioeng-110519-075414. PMID 32169000. S2CID 212707563.