Evaluation of drag models for particles and powders with non-uniform size and shape

Gerhardter, Hannes; Prieler, René Josef; Mayr, Bernhard; Knoll, Mario; Mühlböck, M.; Tomazic, P.; Hochenauer, Christoph

doi:10.1016/j.powtec.2018.02.036

Cited by 15 publications

(2 citation statements)

References 32 publications

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“…When calculating the motion of Non-spherical particles while applying the Lagrange discrete phase method, a non-spherical drag model could better describe the moving properties of the biomass particle than a spherical drag model such as the Schiller and Naumann's model [24] . There are some applications of classical nonspherical fluid-solid drag models in the literature.…”

Section: Introductionmentioning

confidence: 99%

Fluid-solid drag models selection for simulating wheat straw particle movement in anaerobic digester

Yang¹,

Zhu²

2023

International Journal of Agricultural and Biological Engineering

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Computational fluid dynamics (CFD) has been utilized to simulate the movements of wheat straw particles for agitator speed selection in full-scale wet digestion. Previous research has found that the current drag model generally used for depicting the motion of spherical particles cannot match the movement behavior of wheat straw particles with their nonspherical shape. In this study, the sedimentation experiment and horizontal flow experiment of straw particles were determined using a V20-3D camera and a micro Particle Image Velocimetry (PIV) system. With analyses of the experimental data and CFD simulation results, the prediction accuracies of the non-spherical drag models of Hölzer and Sommerfeld (HS), Kishore and Gu (KG), Haider and Levenspiel (HL), Richter and Nikrityuk (RN), and Fabio Dioguardi (FD) were evaluated by the motion of individual straw particles. The results showed that the KG model has a significant advantage over the other drag models, both simulating the particle settling velocities in a one dimensional settling experiment and simulating the predictable trajectory in a two-dimensional horizontal flow experiment. Therefore, the KG drag model was selected to simulate with CFD the wheat straw particle movement to select agitator speeds. Additionally, the realizable k-turbulence model was proven to be superior to the other turbulence models for simulating the continuous phase flow with CFD.

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Section: Introductionmentioning

confidence: 99%

Fluid-solid drag models selection for simulating wheat straw particle movement in anaerobic digester

Yang¹,

Zhu²

2023

International Journal of Agricultural and Biological Engineering

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“…The influence of particle sizes and shapes from the previous empirical results is considered as a whole. However, the moderated drag models published from Epelle-Gerogiorgis (EG), Refs [45][46][47] were considered for adaptation.…”

Section: Drag Adaptationmentioning

confidence: 99%

A CFD Validation Effect of YP/PV from Laboratory-Formulated SBMDIF for Productive Transport Load to the Surface

et al. 2022

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Several technical factors contribute to the flow of cuttings from the wellbore to the surface of the well, some of which are fundamentally due to the speed and inclination of the drill pipe at different positions (concentric and eccentric), the efficacy of the drilling mud considers plastic viscosity (PV) and yield point (YP), the weight of the cuttings, and the deviation of the well. Moreover, these overlaying cutting beds breed destruction in the drilling operation, some of which cause stuck pipes, reducing the rate of rotation and penetration. This current study, while it addresses the apropos of artificial intelligence (AI) with symmetry, employs a three-dimensional computational fluid dynamic (CFD) simulation model to validate an effective synthetic-based mud-drilling and to investigate the potency of the muds’ flow behaviours for transporting cuttings. Furthermore, the study examines the ratio effects of YP/PV to attain the safe transport of cuttings based on the turbulence of solid-particle suspension from the drilling fluid and the cuttings, and its velocity–pressure influence in a vertical well under a concentric and eccentric position of the drilling pipe. The resulting CFD analysis explains that the YP/PV of SBM and OBM, which generated the required capacity to suspend the cuttings to the surface, are symmetric to the experimental results and hence, the position of the drill pipe at the concentric position in vertical wells required a lower rotational speed. A computational study of the synthetic-based mud and its potency of not damaging the wellbore under an eccentric drill pipe position can be further examined.

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Determining the heating characteristics of non-spherical particles in combusting flows

Gerhardter

Knoll

Prieler

et al. 2019

Applied Thermal Engineering

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Evaluation of drag models for particles and powders with non-uniform size and shape

Cited by 15 publications

References 32 publications

Fluid-solid drag models selection for simulating wheat straw particle movement in anaerobic digester

Fluid-solid drag models selection for simulating wheat straw particle movement in anaerobic digester

A CFD Validation Effect of YP/PV from Laboratory-Formulated SBMDIF for Productive Transport Load to the Surface

Determining the heating characteristics of non-spherical particles in combusting flows

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