Study on Pipeline Self-Flowing Transportation of Cemented Tailing Fill Slurry Based on Fluent Software

2013 ◽  
Vol 734-737 ◽  
pp. 833-837
Author(s):  
Gen Bo Yu ◽  
Peng Yang ◽  
Zan Cheng Chen ◽  
Rui Ying Men
Keyword(s):  
Numerical Simulation ◽  
Critical Velocity ◽  
Flow Rate ◽  
Pressure Loss ◽  
Filling Material ◽  
Simulation Research ◽  
Fluent Software ◽  
Slurry Flow Rate ◽  
Pipeline Design ◽  
Calculation Analysis

The related calculation analysis and numerical simulation is the basis of filling pipeline design and installation. Based on characteristics testing of the filling material, the related calculation was performed on the filling slurry gravity transport by pipelines. Chosen pipeline whose diameter was 75 mm, the natural flowing speed can reach 2.6 m/s on condition of the highest concentration for 65%, which is greater than the critical velocity and can meet the needs of the production of the mine. Numerical simulation research shows that the flowing speed of system was relatively ideal, slurry flow rate of bend place has great change while pressure uniformity in the rest parts, and the pressure loss is 0.8 MPa. Therefore, it is capable to achieve gravity flow transporting.

Simulation Research of Angle Action on Fold-Type Board in Air-Heating Collector

2013 ◽  
Vol 706-708 ◽  
pp. 1562-1565 ◽  
Author(s):  
Lin Qiu ◽  
Run Ping Niu ◽  
Min Yan ◽  
Jin Yang
Keyword(s):  
Numerical Simulation ◽  
Thermal Properties ◽  
Velocity Field ◽  
Simulation Research ◽  
Air Heating ◽  
Numeric Simulation ◽  
Fold Type ◽  
Fluent Software ◽  
Better Than ◽  
Simulation Condition

In this study a fold-type board collector in air-heating is introduced. The factor of fold-type board collector angle action that contributes to the temperature and velocity field were respectively discussed. Numerical simulation of the thermal properties of fold-type collector on different angle with Fluent software. Numeric simulation calculations shown: the fold-type board collector angle action has a greater influence for the thermal properties of collector in air-heating ,the thermal efficiency when is 30°is better than is 45°and is 60°and under this work simulation condition the optimum angle for folded-type panel air collector will be recommend nearby at =30°.

scholarly journals Collecting finely-dispersed particles from the gas flow in a centrifugal separator with coaxially arranged pipes

2020 ◽  
Vol 315 ◽  
pp. 03003
Author(s):  
Vadim E. Zinurov ◽  
Oksana S. Dmitrieva ◽  
Oksana S. Popkova
Keyword(s):  
Numerical Simulation ◽  
Pressure Loss ◽  
Software Package ◽  
Gas Flow ◽  
Scientific Paper ◽  
Centrifugal Separator ◽  
Centrifugal Forces ◽  
Ansys Fluent ◽  
Dispersed Particles ◽  
Fluent Software

The article deals with the problem of increasing the efficiency of dedusting the gas flow from the finely dispersed particles smaller than 10 μm. In order to solve this problem, a design of centrifugal separator with coaxially arranged pipes is proposed. The described principle of operation includes the large values of centrifugal forces, which take place inside the device when the flow is swirled, and these forces throw the finely dispersed particles to the walls of device. This scientific paper shows a numerical simulation of gas flow dedusting process by means of ANSYS Fluent software package. The efficiency of dedusting the gas from the finely dispersed particles of up to 10 μm in the device is on average within the range of 53.8–76.7%. The exponential function, describing the changes in the pressure loss from the input gas rate, is obtained. In the course of studies, it was found that the pressure loss in the device is not more than 800 Pa at the input gas rate from 3 to 19 m/s.

The Numerical Simulation and Experimental Research of Combustor in Micro Thermophotovoltaic Systems

2014 ◽  
Vol 678 ◽  
pp. 576-581
Author(s):  
Chuang Li ◽  
Bin Xu ◽  
Jian Wu ◽  
Yi Cheng ◽  
Zhi Hao Ma
Keyword(s):  
Numerical Simulation ◽  
Porous Media ◽  
Cross Section ◽  
Flow Rate ◽  
Outlet Temperature ◽  
Contour Map ◽  
Average Temperature ◽  
Porous Media Model ◽  
Fluent Software ◽  
Temperature Contour

With the establishment of the appropriate porous media model of the combustor, temperature contour map on combustor cross section were simulated under the condition of different flow rate and different porosity in the Fluent software, and experimented to verify the simulation. The results show that: Flame core position moves toward the export with the increase of flow rate, but when the flow increases to a certain amount, the outlet temperature rises significantly. temperature distribution is the best when flow rate is 120 mL/min; With the decrease of the porosity, the flame core position moves to the entrance. Wall average temperature of the combustor is the highest when porosity is 0.4.

Simulation Research for the Back-Feeder in CFBs

2011 ◽  
Vol 347-353 ◽  
pp. 3758-3761
Author(s):  
Xue Yao Wang ◽  
Jia Chang Wang ◽  
Xiang Xu ◽  
Yun Han Xiao
Keyword(s):  
Numerical Simulation ◽  
Flow Pattern ◽  
Working Conditions ◽  
Flow Rate ◽  
Physical Models ◽  
Stable Operation ◽  
Concentration Profiles ◽  
Simulation Research ◽  
Solids Concentration ◽  
Continuous Running

The flow character of the back-feeder is important for the stable operation and continuous running of CFBs. In this paper, the numerical simulation research for the back-feeder is carried out. The solids concentration profiles in the standpipe and back-feeder are obtained. The influence of the aeration flow rate on the flow pattern and the flow stability is researched. Under the working conditions, the consistence of the flow character between the simulation and the experiment proved the practicability of the mathematic and physical models in this simulation.

The Effect of Inner Cylinder on Cyclone Preheater Using Fluent Software

2014 ◽  
Vol 1030-1032 ◽  
pp. 1352-1355
Author(s):  
Li Long Dong ◽  
Wei Lin Zhao ◽  
Jian Rong Wang ◽  
Zong Jun Geng
Keyword(s):  
Numerical Simulation ◽  
Flow Field ◽  
Turbulence Model ◽  
Pressure Loss ◽  
Gas Flow ◽  
Particle Trajectory ◽  
Cement Plant ◽  
Thermal Data ◽  
Fluent Software ◽  
Simulation Results

The paper presented the gas flow field and particle trajectory with a series of inner cylinders in cyclone preheater using RNG k-ε turbulence model and stochastic trajectory model on the platform of Fluent software. The separability and pressure loss of cyclone preheater were investigated. The result shows the ratio of d/D and h/H of cyclone preheater was advised 0.50 to 0.65 and 0.35 to 0.60 respectively. It is also found that the numerical simulation results are in agreement with the thermal data of cement plant.

Numerical Simulation Research for the Optimization of the Wet Flue Gas Desulfurization Tower

2012 ◽  
Vol 170-173 ◽  
pp. 3662-3667 ◽  
Author(s):  
Shun Li Fang ◽  
Yi Qing Du ◽  
Su Yi Huang ◽  
Wu Qi Wen ◽  
Yi Liu
Keyword(s):  
Numerical Simulation ◽  
Residence Time ◽  
Flue Gas ◽  
Flue Gas Desulfurization ◽  
Simulation Research ◽  
Entrance Angle ◽  
Fluent Software ◽  
Inclined Angle ◽  
Entrance Velocity ◽  
Design And Application

The wet flue gas desulfurization is the main technology used today in China. Aimed the sintering gas desulfurization tower, Fluent software is used here to simulate the flow in the tower with different gas entrance angle and velocity, and we have got the effect of sintering gas entrance angle and velocity on the flow in the tower. The result shows: an appropriate increase of the gas entrance velocity and a downward inclined angle will be helpful for extending the residence time in the tower of the sintering gas and it will also improve the flow in the tower. This research could provide reference for the design and application of new wet flue sintering gas desulfurization tower later.

scholarly journals Numerical Simulation Research on Multi-field Coupling of Underground Energy Pile

2021 ◽  
Vol 1838 (1) ◽  
pp. 012061
Author(s):  
Qihui Zhou ◽  
Zhanjun Huang ◽  
Yong Wu ◽  
Huipeng Zhang ◽  
Yufeng Shi ◽  
...  
Keyword(s):  
Numerical Simulation ◽  
Simulation Research ◽  
Energy Pile ◽  
Field Coupling

Experimental investigation into polishing of monocrystalline silicon wafer using double-disc chemical assisted magnetorheological finishing process

2021 ◽  
pp. 095440622098384
Author(s):  
Mayank Srivastava ◽  
Pulak M Pandey
Keyword(s):  
Surface Roughness ◽  
Silicon Wafer ◽  
Flow Rate ◽  
Silicon Wafers ◽  
Monocrystalline Silicon ◽  
Slurry Flow ◽  
Magnetorheological Finishing ◽  
Finishing Process ◽  
Process Factors ◽  
Slurry Flow Rate

In the present work, a novel hybrid finishing process that combines the two preferred methods in industries, namely, chemical-mechanical polishing (CMP) and magneto-rheological finishing (MRF), has been used to polish monocrystalline silicon wafers. The experiments were carried out on an indigenously developed double-disc chemical assisted magnetorheological finishing (DDCAMRF) experimental setup. The central composite design (CCD) was used to plan the experiments in order to estimate the effect of various process factors, namely polishing speed, slurry flow rate, percentage CIP concentration, and working gap on the surface roughness ([Formula: see text]) by DDCAMRF process. The analysis of variance was carried out to determine and analyze the contribution of significant factors affecting the surface roughness of polished silicon wafer. The statistical investigation revealed that percentage CIP concentration with a contribution of 30.6% has the maximum influence on the process performance followed by working gap (21.4%), slurry flow rate (14.4%), and polishing speed (1.65%). The surface roughness of polished silicon wafers was measured by the 3 D optical profilometer. Scanning electron microscopy (SEM) and atomic force microscopy (AFM) were carried out to understand the surface morphology of polished silicon wafer. It was found that the surface roughness of silicon wafer improved with the increase in polishing speed and slurry flow rate, whereas it was deteriorated with the increase in percentage CIP concentration and working gap.

scholarly journals Investigation on influences of loose gas on gas-solid flows in a circulating fluidized bed (CFB) reactor using full-loop numerical simulation

2020 ◽  
Vol 0 (0) ◽  
Author(s):  
Pengju Huo ◽  
Xiaohong Li ◽  
Yang Liu ◽  
Haiying Qi
Keyword(s):  
Numerical Simulation ◽  
Flow Rate ◽  
Gas Flow ◽  
Circulating Fluidized Bed ◽  
Separation Efficiency ◽  
Circulation Rate ◽  
Solid Mass ◽  
Gas Flow Rate ◽  
Gas Leakage ◽  
Mass Circulation

AbstractThe influences of loose gas on gas-solid flows in a large-scale circulating fluidized bed (CFB) gasification reactor were investigated using full-loop numerical simulation. The two-fluid model was coupled with the QC-energy minimization in multi-scale theory (EMMS) gas-solid drag model to simulate the fluidization in the CFB reactor. Effects of the loose gas flow rate, Q, on the solid mass circulation rate and the cyclone separation efficiency were analyzed. The study found different effects depending on Q: First, the particles in the loop seal and the standpipe tended to become more densely packed with decreasing loose gas flow rate, leading to the reduction in the overall circulation rate. The minimum Q that can affect the solid mass circulation rate is about 2.5% of the fluidized gas flow rate. Second, the sealing gas capability of the particles is enhanced as the loose gas flow rate decreases, which reduces the gas leakage into the cyclones and improves their separation efficiency. The best loose gas flow rates are equal to 2.5% of the fluidized gas flow rate at the various supply positions. In addition, the cyclone separation efficiency is correlated with the gas leakage to predict the separation efficiency during industrial operation.

Numerical Simulation of the Performance of an Axial Compressor Operating With Supercritical Carbon Dioxide

2018 ◽  
Author(s):  
Jinlan Gou ◽  
Wei Wang ◽  
Can Ma ◽  
Yong Li ◽  
Yuansheng Lin ◽  
...  
Keyword(s):  
Carbon Dioxide ◽  
Numerical Simulation ◽  
Supercritical Carbon Dioxide ◽  
Critical Point ◽  
Mass Flow Rate ◽  
Mass Flow ◽  
Flow Rate ◽  
Axial Compressor ◽  
Brayton Cycle ◽  
Supercritical Carbon

Using supercritical carbon dioxide (SCO2) as the working fluid of a closed Brayton cycle gas turbine is widely recognized nowadays, because of its compact layout and high efficiency for modest turbine inlet temperature. It is an attractive option for geothermal, nuclear and solar energy conversion. Compressor is one of the key components for the supercritical carbon dioxide Brayton cycle. With established or developing small power supercritical carbon dioxide test loop, centrifugal compressor with small mass flow rate is mainly investigated and manufactured in the literature; however, nuclear energy conversion contains more power, and axial compressor is preferred to provide SCO2 compression with larger mass flow rate which is less studied in the literature. The performance of the axial supercritical carbon dioxide compressor is investigated in the current work. An axial supercritical carbon dioxide compressor with mass flow rate of 1000kg/s is designed. The thermodynamic region of the carbon dioxide is slightly above the vapor-liquid critical point with inlet total temperature 310K and total pressure 9MPa. Numerical simulation is then conducted to assess this axial compressor with look-up table adopted to handle the nonlinear variation property of supercritical carbon dioxide near the critical point. The results show that the performance of the design point of the designed axial compressor matches the primary target. Small corner separation occurs near the hub, and the flow motion of the tip leakage fluid is similar with the well-studied air compressor. Violent property variation near the critical point creates troubles for convergence near the stall condition, and the stall mechanism predictions are more difficult for the axial supercritical carbon dioxide compressor.

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