Macro-scale numerical investigation of the contribution of Van der Waals force to the pressure-drop overshoot in fine-particle fluidized beds

• DOI: 10.1016/j.powtec.2024.119505
• Publication Date: 2024-02-05T16:22:28Z
• Authors: Youssef Badran; Renaud Ansart; Jamal Chaouki; Olivier Simonin
• Keywords: Fluidization; Overshoot (microwave communication)

Interparticle Van der Waals force contributes to the overshoot in bed pressure drop at minimum fluidization velocity during transition from static fluidized conditions, which is a well-known phenomenon of fine particles. In this study, two adhesive particle closures considering effect interparticle are used two-fluid model simulations with intention generate overshoot. The first developed within context kinetic theory rapid granular flows failed produce due dominance multiple and long duration contacts fixed-bed flow. Another closure based on coordination number was then proposed represent long-lasting contacts, gave an contribution much larger than one able create