TY - JOUR ID - 66107 TI - CFD-DEM Investigation on van der Waals Force in Gas-Solid Bubbling Fluidized Beds JO - Journal of Chemical and Petroleum Engineering JA - JCHPE LA - en SN - 2423-673X AU - Okhovat, Mahsa AU - Norouzi, Hamidreza AU - Mostoufi, Navid AD - Process Design and Simulation Research Center, School of Chemical Engineering, College of Engineering, University of Tehran, P.O. Box 11155-4563, Tehran, Iran. AD - Depatment of Chemical Engineering, Amirkabir University of Technology (Tehran Polytechnic), PO Box: 15875-4413, Hafez 424, Tehran, Iran Y1 - 2018 PY - 2018 VL - 52 IS - 1 SP - 93 EP - 105 KW - Discrete Element Method KW - Interparticle forces KW - Hydrodynamics KW - Bubble KW - Fluidization DO - 10.22059/jchpe.2018.256180.1230 N2 - Effect of interparticle force on the hydrodynamics of gas-solid fluidized beds was investigated using the combined method of computational fluid dynamics and discrete element method (CFD-DEM). The cohesive force between particles was considered to follow the van der Waals equation form. The model was validated by experimental results from literature in terms of bed voidage distribution and Eulerian solid velocity field. The results revealed that the incorporated model can satisfactorily predict the hydrodynamics of the fluidized bed in the presence of interparticle forces. Effect of interparticle force on the bubble rise characteristics, such as bubble stability, bubble diameter and bubble velocity, was investigated. It was shown that the emulsion voidage increases with increasing the interparticle force in the bed and it can hold more gas inside its structure. In addition, by increasing the interparticle force, size of bubbles and rise velocity of bubbles increase while the average velocity of particles decreases. UR - https://jchpe.ut.ac.ir/article_66107.html L1 - https://jchpe.ut.ac.ir/article_66107_67efadccff86f9cb08dc24447dc06ac5.pdf ER -