scholarly journals DPM model segregation validation and scaling effect in a rotary drum

2021 ◽  
Author(s):  
Amit V. Patil ◽  
Jesse Hofsteenge ◽  
Jakub M. Bujalski ◽  
Stein T. Johansen
Keyword(s):  
Experimental Data ◽  
Particle Size ◽  
Scaling Limit ◽  
Phase Method ◽  
Segregation Behavior ◽  
Discrete Phase Method ◽  
Discrete Phase ◽  
Parcel Size ◽  
Rotary Drum ◽  
Dynamic Segregation

AbstractDiscrete phase method (DPM) model was used to analyse rotary drum systems for segregation behavior. DPM simulations were performed for comparison with a dynamic segregation experimental measurement from the literature. This included dynamic segregation and time-averaged particle velocity field, which were validated with experimental data. In addition, a direct DPM and parcel scaled DPM simulation study was performed to analyse the effect of drum and particle parcel size scaling. The segregation dynamics was evaluated using the Lacey mixing index. This work shows segregation dynamics decreases with increasing drum size while keeping the same particle size. It further shows that for a given drum size the segregation dynamics deviate after a certain particle parcel scaling limit. The parcel scaling limit also increases with increasing drum size.

scholarly journals Concrete Erosion Modelling by Water Jet using Discrete Phase Method

2021 ◽  
Vol 1058 (1) ◽  
pp. 012032
Author(s):  
Rawaa H. Ismaeil ◽  
Ali N. Hilo ◽  
Thaar S. Al-Gasham ◽  
Ali Hameed Abd
Keyword(s):  
Water Jet ◽  
Phase Method ◽  
Discrete Phase Method ◽  
Discrete Phase ◽  
Erosion Modelling

Modelling coal gasification with CFD and discrete phase method

2006 ◽  
Vol 79 (4) ◽  
pp. 217-221 ◽  
Author(s):  
S.-P. Shi ◽  
S. E. Zitney ◽  
M. Shahnam ◽  
M. Syamlal ◽  
W. A. Rogers
Keyword(s):  
Coal Gasification ◽  
Phase Method ◽  
Discrete Phase Method ◽  
Discrete Phase

scholarly journals Simulation on Air-Fly Ash Particles Using Discrete Phase Method

2020 ◽  
Vol 920 ◽  
pp. 012021
Author(s):  
N.M. Zahari ◽  
Mastika Falsha Harun ◽  
Mahyun Zainoodin ◽  
Daud Mohamad ◽  
Agusril Syamsir ◽  
...  
Keyword(s):  
Fly Ash ◽  
Phase Method ◽  
Discrete Phase Method ◽  
Discrete Phase

scholarly journals A numerical simulation of wheel spray for simplified vehicle model based on discrete phase method

2015 ◽  
Vol 7 (7) ◽  
pp. 168781401559719 ◽  
Author(s):  
Xingjun Hu ◽  
Lei Liao ◽  
Yulong Lei ◽  
Hanbo Yang ◽  
Qingyin Fan ◽  
...  
Keyword(s):  
Numerical Simulation ◽  
Phase Method ◽  
Vehicle Model ◽  
Model Based ◽  
Discrete Phase Method ◽  
Discrete Phase

scholarly journals Numerical prediction of short-cut flows in gas-solid reverse flow cyclone separators

2017 ◽  
Vol 23 (4) ◽  
pp. 483-493 ◽  
Author(s):  
Ali Sakin ◽  
Irfan Karagoz
Keyword(s):  
Collection Efficiency ◽  
Reverse Flow ◽  
Reynolds Stress Model ◽  
Solid Particles ◽  
Phase Method ◽  
Geometrical Parameters ◽  
Pressure Drops ◽  
Discrete Phase Method ◽  
Discrete Phase ◽  
Vortex Finder

The effect of operational and geometrical parameters on the short-cut flow in cyclone separators has been investigated computationally using the Reynolds stress model (RSM). The motion of solid particles in the flow field was simulated using the Eulerian-Lagrangian approach with one way discrete phase method (DPM). Eleven cyclones with different cone tip diameters, vortex finder lengths and diameters were studied and the simulation results were analyzed in terms of velocity fields, pressure drops, cut-off diameters and short-cut flows. The numerical simulation was verified with the published experimental results. The results obtained demonstrate that all three parameters, particularly, vortex finder diameter, have significant effects on the cut-off diameter (collection efficiency), the short-cut flow and the pressure drop.

Utilization of Waste of Enzymes Biomass as Biosorbent for the Removal of Dyes from Aqueous Solution in Batch and Fluidized Bed Column

2020 ◽  
Vol 71 (1) ◽  
pp. 1-12
Author(s):  
Salman H. Abbas ◽  
Younis M. Younis ◽  
Mohammed K. Hussain ◽  
Firas Hashim Kamar ◽  
Gheorghe Nechifor ◽  
...  
Keyword(s):  
Experimental Data ◽  
Aqueous Solution ◽  
Particle Size ◽  
Adsorption Capacity ◽  
Fluidized Bed ◽  
Flow Rate ◽  
Fungal Biomass ◽  
Solution Flow Rate ◽  
Maximum Adsorption Capacity ◽  
Solution Flow

The biosorption performance of both batch and liquid-solid fluidized bed operations of dead fungal biomass type (Agaricusbisporus ) for removal of methylene blue from aqueous solution was investigated. In batch system, the adsorption capacity and removal efficiency of dead fungal biomass were evaluated. In fluidized bed system, the experiments were conducted to study the effects of important parameters such as particle size (701-1400�m), initial dye concentration(10-100 mg/L), bed depth (5-15 cm) and solution flow rate (5-20 ml/min) on breakthrough curves. In batch method, the experimental data was modeled using several models (Langmuir,Freundlich, Temkin and Dubinin-Radushkviechmodels) to study equilibrium isotherms, the experimental data followed Langmuir model and the results showed that the maximum adsorption capacity obtained was (28.90, 24.15, 21.23 mg/g) at mean particle size (0.786, 0.935, 1.280 mm) respectively. In Fluidized-bed method, the results show that the total ion uptake and the overall capacity will be decreased with increasing flow rate and increased with increasing initial concentrations, bed depth and decreasing particle size.

Simulation on Extrusion Comminution Model of Roller Press

2010 ◽  
Vol 156-157 ◽  
pp. 1702-1707
Author(s):  
Xiang Wen Cheng ◽  
Jinchao Liu ◽  
Qi Zhi Ding ◽  
Li Ming Song ◽  
Zhan Lin Wang
Keyword(s):  
Experimental Data ◽  
Particle Size ◽  
Field Experiments ◽  
Size Ratio ◽  
Optimum Operating ◽  
Extrusion Force ◽  
Particle Size Ratio ◽  
Small Constant ◽  
Working Parameters ◽  
The Relationship

How to predict the relationship among particle size and among product size, to establish the relationship between the granularity and working parameters in the process of grinding and to determine the optimum operating parameters. With proposing BS squeeze crush model by L. Bass and the idea of roll surface division as the material uneven extrusion force are adopted. Based on field experiments the experimental data is analyzed, the select function and the breakage functions are fitted with MATLAB software, and obtaining their model. The comminution model is determined by the roller division. We obtain the model parameter through the experimental data. Through model analysis shows: the relationship between particle breakage and energy absorption, namely the smaller size of the same power, the lower broken; the breakage diminishes with the decrease of particle size ratio and it will be tending to a small constant when the smaller particle size ratio. The breakage functions rapidly decrease within ratio of between 0.2-0.7. This shows: the energy consumption will rapidly increase when the particle size of less than 0.2 in broken; the selection diminish with the decrease of particle size. Pressure (8-9MPa) should be the most appropriate value.

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