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Main Title: Impact of Contact Scaling and Drag Calculation on the Accuracy of Coarse‐Grained Discrete Element Method
Author(s): Jurtz, Nico
Kruggel-Emden, Harald
Baran, Oleh
Aglave, Ravindra
Cocco, Ray
Kraume, Matthias
Type: Article
Abstract: The accuracy of coarse‐grained discrete element method (CGDEM) relies on appropriate scaling rules for contact and fluid‐particle interaction forces. For fluidized bed applications, different scaling rules are used and compared with DEM results. The results indicated that in terms of averaged values as mean particle position and voidage profile, the coupling of computational fluid dynamics and CGDEM leads to accurate results for low scaling factors. Regarding the particle dynamics, the approach leads to an underestimation of RMS values of particle position indicating a loss of particle dynamics in the system due to coarse graining. The impact of cell cluster size on drag force calculation is studied. The use of energy minimization multiscale drag correction is investigated, and a reduced mesh dependency and good accuracy are observed.
Subject(s): Coarse graining
Discrete element method
Numerical simulation
Particle technology
Issue Date: 3-Aug-2020
Date Available: 16-Dec-2020
Language Code: en
DDC Class: 660 Chemische Verfahrenstechnik
Sponsor/Funder: TU Berlin, Open-Access-Mittel – 2020
Journal Title: Chemical Engineering & Technology
Publisher: Wiley
Volume: 43
Issue: 10
Publisher DOI: 10.1002/ceat.202000055
Page Start: 1959
Page End: 1970
EISSN: 1521-4125
ISSN: 0930-7516
TU Affiliation(s): Fak. 3 Prozesswissenschaften » Inst. Prozess- und Verfahrenstechnik » FG Verfahrenstechnik
Appears in Collections:Technische Universität Berlin » Publications

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