Investigation of impact of solid particles against hardmetal and cermet targets

Hussainova, Irina; Kübarsepp, Jakob; Shcheglov, Igor

doi:10.1016/s0301-679x(99)00073-0

Cited by 54 publications

(31 citation statements)

References 4 publications

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“…If the experimental test is conducted in low angle than 90º, the specimen with boron may receive more damage from impaction of solid particles. This tendency accorded with the study of Hussainova et al (1999).…”

Section: Discussionsupporting

confidence: 90%

Simulation of solid particle erosion in WC-Ni coated wall using CFD

Kim

Joo

Lee

2015

Journal of Materials Processing Technology

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Section: Discussionsupporting

confidence: 90%

Simulation of solid particle erosion in WC-Ni coated wall using CFD

Kim

Joo

Lee

2015

Journal of Materials Processing Technology

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“…Several analytical and semi-empirical models have been developed to evaluate µ and e w in terms of flow parameters such as the impact velocity, impact angle, particle spin and the particle and wall properties [25][26][27][28][29]. While it has been shown that the frictional coefficient significantly affects the collision regime (sliding/non-sliding) [25], fluidization predictions are not sensitive to e w in the range 0.7-1.0 [1,30].…”

Section: Introductionmentioning

confidence: 99%

Eulerian–Eulerian simulation of dense solid–gas cylindrical fluidized beds: Impact of wall boundary condition and drag model on fluidization

et al. 2015

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Modeling the hydrodynamics of dense-solid gas flows is strongly affected by the wall boundary condition and in particular, the specularity coefficient φ which characterizes the tangential momentum transfer from the particles to the wall. The focus of this study is to investigate the impact of φ on the fluidization hydrodynamics using a fully Eulerian description of the solid and gas phases in 3D cylindrical coordinates. In order to quantify this impact, tools for characterizing the bubbling dynamics and solids circulation are developed and applied to both lab-scale (diameters 10 cm and 14.5 cm) and pilot-scale (diameter 30 cm) cylindrical beds. Comparison of simulation predictions with experimental data for different fluidization regimes and particle properties suggests that values of φ in the range [0.01,0.3] are suitable for simulating most dense solid-gas flows of practical interest. It is also shown that for this range of φ, the fluidization hydrodynamics are not significantly dependent on the choice of φ especially as the bed diameter is increased. Additionally, 3D validation of the variable φ model by Li and Benyahia [1] shows the bubble diameter predictions to be in excellent agreement with experiment and the average value of φ predicted within the range [0.01,0.3]. Quantifying the impact of φ and establishing an appropriate range is not only important for accurate simulations at both lab and pilot scales but also validation of models and sub-models for a better understanding of the fluidization phenomenon. Finally, a comparison of the Gidaspow and Syamlal-O'Brien gas-solids drag model shows that the former is more applicable to homogeneous bubbling fluidization (U/U mf <4) while the latter is only suitable for high velocities (U/U mf >4) associated with larger bubbles and slugs.

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“…9a shows that ploughing is the dominant mechanism of material removal for the pipeline steel under the impact of quartz sands. A single impact of sands causes a little direct material loss, but multiple impacts will cause detachment of the extruded lips of the ductile material [24]. As shown in Fig.…”

Section: Slurry Erosion Resistance Of Sic Foam /Epmentioning

confidence: 99%

“…The coefficient of velocity restitution can be expressed in terms of deformations during impact as K = [0.8h e /(h e + h p )] 1/2 , where h e is the total elastic deformation of the particle and target, and h p is the depth of impact crater in target surface [27]. Hussainova et al [24] has investigated that when the particles striking against the target are softer than the material, fracture due to individual impacts may not occur and plastic indentation may be absent. Because quartz sand (Mohs scale 7) is softer than SiC (Mohs scale 9.5), the plastic deformation of SiC is negligible during the collision and h p ?…”

Section: Slurry Erosion Resistance Of Sic Foam /Epmentioning

confidence: 99%