A resolved and unresolved discrete element method coupled with volume of fluid method

IF 4.5 2区工程技术 Q2 ENGINEERING, CHEMICAL

Powder Technology Pub Date : 2025-03-29 DOI:10.1016/j.powtec.2025.120993

Qing Yang , Zunjiang Wang , Tao Yang , Bo Chen , Linmin Li , Zhe Lin

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引用次数: 0

Abstract

To overcome the challenges in modeling the complex gas-liquid-solid three-phase flow containing multiscale particles and multiple fluids with sharp interfaces, a resolved and unresolved coupled discrete element method (DEM) is developed and incorporated in an optimized volume of fluid (VOF) method to implement a multiscale gas-liquid-solid three-phase flow solver. In this study, solid particles in different scales are divided into two simulation strategies, where big particles above the scale threshold are resolved using the immersed boundary-discrete element method (IB-DEM) while small particles are solved using the unresolved DEM. For coupling between unresolved DEM and VOF, several volume-averaging methods are also employed for particles close to the grid size and different cases are conducted to validate the volume conservation as well as the momentum coupling strategy. For IB-DEM-VOF coupling, simulations are also conducted to validate the accuracy of the resolved method and a fluid-velocity delay method is used for large particles passing through the interface. Finally, experimental test cases of gas-liquid-solid three-phase flow with particles having varying scales are simulated by the resolved-unresolved DEM-VOF (R-U-DEM-VOF) coupled solver, obtaining good agreements and indicating the suitability and accuracy of the model and solver.

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来源期刊

Powder Technology 工程技术-工程：化工

CiteScore

9.90

自引率

15.40%

发文量

1047

审稿时长

46 days

期刊介绍： Powder Technology is an International Journal on the Science and Technology of Wet and Dry Particulate Systems. Powder Technology publishes papers on all aspects of the formation of particles and their characterisation and on the study of systems containing particulate solids. No limitation is imposed on the size of the particles, which may range from nanometre scale, as in pigments or aerosols, to that of mined or quarried materials. The following list of topics is not intended to be comprehensive, but rather to indicate typical subjects which fall within the scope of the journal's interests: Formation and synthesis of particles by precipitation and other methods. Modification of particles by agglomeration, coating, comminution and attrition. Characterisation of the size, shape, surface area, pore structure and strength of particles and agglomerates (including the origins and effects of inter particle forces). Packing, failure, flow and permeability of assemblies of particles. Particle-particle interactions and suspension rheology. Handling and processing operations such as slurry flow, fluidization, pneumatic conveying. Interactions between particles and their environment, including delivery of particulate products to the body. Applications of particle technology in production of pharmaceuticals, chemicals, foods, pigments, structural, and functional materials and in environmental and energy related matters. For materials-oriented contributions we are looking for articles revealing the effect of particle/powder characteristics (size, morphology and composition, in that order) on material performance or functionality and, ideally, comparison to any industrial standard.