Powder Technology, Journal Year: 2024, Volume and Issue: 450, P. 120437 - 120437
Published: Nov. 17, 2024
Language: Английский
Powder Technology, Journal Year: 2023, Volume and Issue: 426, P. 118656 - 118656
Published: May 15, 2023
Language: Английский
Citations
29
Powder Technology, Journal Year: 2021, Volume and Issue: 387, P. 156 - 180
Published: April 7, 2021
Language: Английский
Citations
38
Powder Technology, Journal Year: 2022, Volume and Issue: 405, P. 117535 - 117535
Published: May 21, 2022
Interest in biofuels has grown recent years. Unfortunately, biofuel refineries are unable to operate at full capacity due handling and feeding issues as the systems for biomass often poorly designed. To inform more effective reliable systems, this study presents mechanical (moisture, particle size/distribution, bulk density, compressibility, elastic recovery) flow characterization (critical arching distance feed rate a wedge hopper screw feeder) of corn (Zea mays L.) stover. Results showed that size most significant effect on flowability, while moisture content plays role sample with large particles. For example, nominal 3 mm 10% was 44 lb./h, compared 24 lb./h same but larger 25 mm. Samples sizes contents 30% exhibited much smaller differences rate. The former latter 46 such difference within experimental measurement uncertainty. Additionally, critical increases increasing exhibits small dependence content. overall concludes milled stover feedstocks particles exhibit substantially better flowability.
Language: Английский
Citations
28
International Journal of Geomechanics, Journal Year: 2023, Volume and Issue: 23(6)
Published: April 10, 2023
Granular materials, such as rockfill materials and carbonate sand, exhibit complex mechanical behavior, which is affected by particle breakage under elevated pressures. In this study, we present a relative model based on mean stress, void ratio, strain. We further consider the effect of critical state line. A hypoplastic constitutive developed incorporating state. The validity shown comparing numerical experimental results drained triaxial tests.
Language: Английский
Citations
11
ACS Sustainable Chemistry & Engineering, Journal Year: 2025, Volume and Issue: 13(2), P. 731 - 736
Published: Jan. 9, 2025
Magnesium stearate (MgSt), a common flow additive and anticaking agent, was applied to corn stover feedstocks with three particle sizes. The material handling properties of dry, 15%, 30% moisture content were measured Freeman FT-4 powder rheometer mass hopper calculations. While hydrated biomass typically exhibits poor flowability, introducing MgSt led significant increase in flowability for dry 15% feedstocks, less impact at content. Inverse gas chromatography showed decrease, up 40%, the surface energy MgSt-coated stover. may not be ideal biofuel or chemical production, this study highlights potential additives reduce adhesive cohesive forces, improving feedstock handling.
Language: Английский
Citations
0
ACS Sustainable Chemistry & Engineering, Journal Year: 2025, Volume and Issue: 13(16), P. 5838 - 5851
Published: April 16, 2025
The promise of biomass-derived biofuels is often overshadowed by intricate material handling challenges such as hopper clogging and screw feeder jamming. These issues stem from the knowledge gap among particle-scale properties (e.g., particle size), bulk-scale attributes relative density), macro-scale equipment design inclination), flow performance probability clogging). This work combines physical experiments, validated numerical simulations, data augmentation to develop a machine learning-based for flowing granular woody biomass materials. behavior simulated against tests utilizing developed smoothed hydrodynamics (SPH) solver modified hypoplastic model. A comprehensive evaluation performance, including rate, stability, pattern, conducted on an extensive set encompassing various sizes, moisture contents, densities, operating conditions. feed-forward neural network trained optimized with this correlate cross-scale metrics. results reveal promising predictive accuracy seen unseen sets. Further how input affect predicted metrics carried out. indicate that opening width primarily dictates throughput, while density, wall friction, inclination angle, collectively impact stability. Additionally, patterns are predominantly governed angle. Moreover, potential found be exclusively characterized index dedicated combination high dense packing, smooth low angles, small widths substantially elevates risk unstable flows clogging. study serves potent tool milled materials in hoppers all stakeholders biorefineries manufacturing.
Language: Английский
Citations
0
ACS Sustainable Chemistry & Engineering, Journal Year: 2024, Volume and Issue: 12(10), P. 4213 - 4223
Published: Feb. 28, 2024
Numerical modeling of granular biomass material flow in handling operations is indispensable to decipher upsets, commonly manifested as clogging and jamming hoppers augers. With a computational tool developed based on smoothed particle hydrodynamics (SPH), we simulated the hopper auger feeding six materials. The good agreement between experimental numerical rates demonstrated capability SPH solver complicated impact physical parameters investigated, major results show that pattern controlled by shear band evolution; collectively influenced opening size, wall friction, packing, compressibility feed rate minimal. These parametric studies validate solver's robustness simulating equipment demonstrate can provide insights about mechanics facilitate design optimize operations.
Language: Английский
Citations
3
Powder Technology, Journal Year: 2024, Volume and Issue: 440, P. 119771 - 119771
Published: April 17, 2024
An experiment-informed discrete particle simulation study was performed to investigate the role of flexural particles in shear flow milled pine residues. Physical anatomical fraction samples were tested an FT4 powder rheometer. A chip model for bark/stem chips and a fiber needles proposed DEM. The simulations show mixed fibers/chips require higher force torque drive than pure or fibers. mass flexibility fibers reveal nonlinear inter-dependency on impacting fibers/chips. Polydisperse well match needle-rich attributes, while polydisperse agree reasonably with bark/stem-rich samples. DEM indicates that flowability residue biomass is determined collectively by various material attributes fractions, which must be considered when developing preprocessing methods conversion-ready adequate handling performance.
Language: Английский
Citations
3
Powder Technology, Journal Year: 2024, Volume and Issue: 442, P. 119834 - 119834
Published: May 9, 2024
Language: Английский
Citations
3
Géotechnique Letters, Journal Year: 2025, Volume and Issue: 15(3), P. 1 - 6
Published: April 9, 2025
Nonlocal gradient continua are a reliable way to regularise numerical models of boundary value problems affected by strain localisation. However, the determination additional parameters such formulations, including those controlling length scale potential shear bands, is not straightforward, in that it interplay among stress–strain relations and band morphology. To address this challenge, study proposes parameter strategy for nonlocal strain-softening Mohr–Coulomb model based on discrete-element (DEM) virtual biaxial tests dense granular material. The involves initial calibration conventional inclination, followed subsequent parameter, l. It shown unique combination these exists ensures an effective replication both Finally, effects analysed varying sample size W l ratio. simulated mechanical response patterns align well with DEM data obtained changing ratio mean particle d 50 . These results indicate direct relation between
Language: Английский
Citations
0