DEM investigation of particle flow in a vertical rice mill: Influence of particle shape and rotation speed

2022 ◽  
pp. 117105
Author(s):  
Yong Zeng ◽  
Biqi Mao ◽  
Anqi Li ◽  
Yanlong Han ◽  
Fuguo Jia
Keyword(s):  
Particle Shape ◽  
Rotation Speed ◽  
Particle Flow

Effects of rotation speed and outlet opening on particle flow in a vertical rice mill

2016 ◽  
Vol 297 ◽  
pp. 153-164 ◽  
Author(s):  
Yanlong Han ◽  
Fuguo Jia ◽  
Yong Zeng ◽  
Longwei Jiang ◽  
Yaxiong Zhang ◽  
...  
Keyword(s):  
Rotation Speed ◽  
Particle Flow ◽  
Effects Of Rotation

scholarly journals Investigation of 3D particle flow in a flighted rotating drum

2018 ◽  
Author(s):  
Lanyue Zhang ◽  
Fabian Weigler ◽  
Zhaochen Jiang ◽  
Vesselin Idakiev ◽  
Lothar Mörl ◽  
...  
Keyword(s):  
Particle Tracking ◽  
Particle Motion ◽  
Particle Tracking Velocimetry ◽  
Magnetic Particle ◽  
Rotation Speed ◽  
Flow Behavior ◽  
Particle Flow ◽  
Rotating Drum ◽  
Dem Simulation ◽  
Bed Material

To validate the particle motion in flighted rotating drum (FRD), a laboratory FRD was built and operated at 15% filling degree and 10 rpm rotation speed using plastic balls as bed material. The particle tracking velocimetry (PTV) and magnetic particle tracking (MPT) techniques were applied to investigate the particle flow behavior. The 3D particle flow was modeled by Discrete Element Method (DEM) with LIGGGHTS. The height of the barycenter of all overall particles and particle instantaneous velocity were calculated from PTV and DEM data. The 3D time-averaged particle velocity distributions obtained from MPT experiment and DEM simulation were compared.Keywords: flighted rotating drum; particle motion; particle tracking velocimetry; magnetic particle tracking; DEM simulation.

scholarly journals The effect of rotation speed and mixer size on granular flow and mixing in bladed mixers

2021 ◽  
Vol 249 ◽  
pp. 03036
Author(s):  
Angga Herman ◽  
Jieqing Gan ◽  
Aibing Yu
Keyword(s):  
Particle Velocity ◽  
Granular Flow ◽  
Rotation Speed ◽  
Particle Flow ◽  
Average Particle ◽  
Mixing Rate ◽  
Velocity Increase ◽  
The Past ◽  
Granular Mixing ◽  
Distinct Particle

Bladed mixers are widely used in the industry for granular mixing. In the past decades, the mixing of particles in bladed mixers has been extensively investigated experimentally and numerically. Recently, GPU-based DEM has been employed to simulate various industrial-scale applications. This work aims to apply the GPU-based DEM to investigate the effect of rotation speed and mixer size on granular mixing in bladed mixers of different sizes. The simulation in a larger mixer revealed distinct particle flow patterns that well-describe the mixing mechanism which is difficult to observe in a smaller mixer. The Lacey’s mixing index curves revealed a delay in mixing as the mixer size increases. The mixing rate decreases as the mixer size increases and it can be improved with increasing rotation speed. The average particle velocity increase significantly with increasing rotation speed and mixer size.

An appraisal of characteristic mechanical properties and microstructure of friction stir welding for Aluminium 6061 alloy – Silicon Carbide (SiCp) metal matrix composite

2019 ◽  
Vol 13 (4) ◽  
pp. 5804-5817
Author(s):  
Ibrahim Sabry
Keyword(s):  
Tensile Strength ◽  
Ultimate Tensile Strength ◽  
Metal Matrix Composite ◽  
Matrix Composite ◽  
Metal Matrix ◽  
Welded Joint ◽  
Rotation Speed ◽  
Fusion Welding ◽  
Friction Stir ◽  
Al 6061

It is expected that the demand for Metal Matrix Composite (MMCs) will increase in these applications in the aerospace and automotive industries sectors, strengthened AMC has different advantages over monolithic aluminium alloy as it has characteristics between matrix metal and reinforcement particles.  However, adequate joining technique, which is important for structural materials, has not been established for (MMCs) yet. Conventional fusion welding is difficult because of the irregular redistribution or reinforcement particles.  Also, the reaction between reinforcement particles and aluminium matrix as weld defects such as porosity in the fusion zone make fusion welding more difficult. The aim of this work was to show friction stir welding (FSW) feasibility for entering Al 6061/5 to Al 6061/18 wt. % SiCp composites has been produced by using stir casting technique. SiCp is added as reinforcement in to Aluminium alloy (Al 6061) for preparing metal matrix composite. This method is less expensive and very effective. Different rotational speeds,1000 and 1800 rpm and traverse speed 10 mm \ min was examined. Specimen composite plates having thick 10 mm were FS welded successfully. A high-speed steel (HSS) cylindrical instrument with conical pin form was used for FSW. The outcome revealed that the ultimate tensile strength of the welded joint (Al 6061/18 wt. %) was 195 MPa at rotation speed 1800 rpm, the outcome revealed that the ultimate tensile strength of the welded joint (Al 6061/18 wt.%) was 165 MPa at rotation speed 1000 rpm, that was very near to the composite matrix as-cast strength. The research of microstructure showed the reason for increased joint strength and microhardness. The microstructural study showed the reason (4 %) for higher joint strength and microhardness.  due to Significant   of SiCp close to the boundary of the dynamically recrystallized and thermo mechanically affected zone (TMAZ) was observed through rotation speed 1800 rpm. The friction stir welded ultimate tensile strength Decreases as the volume fraction increases of SiCp (18 wt.%).

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