scholarly journals Numerical Simulation of Slurry flow in horizontal pipe based on CFD-DEM

2020 ◽  
Vol 306 ◽  
pp. 01007
Author(s):  
Jinchao Fan ◽  
Benchun Yao ◽  
Yi Hao ◽  
Shimin Zhang ◽  
Xiaoxiao Zhu
Keyword(s):  
Numerical Simulation ◽  
Particle Size ◽  
Pressure Loss ◽  
Pipe Wall ◽  
Flow Characteristics ◽  
Cleaning Process ◽  
Slurry Flow ◽  
Horizontal Pipe ◽  
Particle Accumulation ◽  
Dem Model

In this paper, we propose a novel pipeline cleaning method utilizing slurry. The reason why slurry can be used for pipeline cleaning is that the collisions between the particles and the contaminant in the pipe wall can enhance the cleaning effect. A slurry with polypropylene particles embedded in water is used to cleaning a horizontal pipe is conducted to realize this method. Because the flow characteristics of the slurry is crucial for the cleaning process, it is valuable to conduct a simulation and investigate the influence of several different factors including the convey velocity and the particle size. A 3D CFD-DEM model has been established. The indicators including pressure loss, particle accumulation level at the top of the pipe are choses to characterize the slurry flow and the influence of convey velocity and particle size has been investigated accordingly. In addition, an effective method is proposed to determine the critical convey velocity for each size of the particle.

Numerical simulation of hydrate slurry flow characteristics in vertical pipes based on population balance theory

2020 ◽  
Vol 25 (3) ◽  
pp. 319
Author(s):  
Shupeng Yao ◽  
Yuxing Li ◽  
Wuchang Wang ◽  
Guangchun Song ◽  
Kai Jiang ◽  
...  
Keyword(s):  
Numerical Simulation ◽  
Flow Characteristics ◽  
Population Balance ◽  
Balance Theory ◽  
Slurry Flow

scholarly journals Eulerian-Eulerian Simulation of Particle-Liquid Slurry Flow in Horizontal Pipe

2016 ◽  
Vol 2016 ◽  
pp. 1-10 ◽  
Author(s):  
Titus Ntow Ofei ◽  
Aidil Yunus Ismail
Keyword(s):  
Experimental Data ◽  
Particle Size ◽  
Radial Distribution ◽  
Pressure Loss ◽  
Particle Concentration ◽  
Volume Fraction ◽  
Particle Volume Fraction ◽  
Turbulence Models ◽  
Particle Volume ◽  
Horizontal Pipe

In this study, a computational fluid dynamics (CFD) simulation which adopts the inhomogeneous Eulerian-Eulerian two-fluid model in ANSYS CFX-15 was used to examine the influence of particle size (90 μm to 270 μm) and in situ particle volume fraction (10% to 40%) on the radial distribution of particle concentration and velocity and frictional pressure loss. The robustness of various turbulence models such as the k-epsilon (k-ε), k-omega (k-ω), SSG Reynolds stress, shear stress transport, and eddy viscosity transport was tested in predicting experimental data of particle concentration profiles. The k-epsilon model closely matched the experimental data better than the other turbulence models. Results showed a decrease in frictional pressure loss as particle size increased at constant particle volume fraction. Furthermore, for a constant particle volume fraction, the radial distribution of particle concentration increased with increasing particle size, where high concentration of particles occurred at the bottom of the pipe. Particles of size 90 μm were nearly buoyant especially for high particle volume fraction of 40%. The CFD study shows that knowledge of the variation of these parameters with pipe position is very crucial if the understanding of pipeline wear, particle attrition, or agglomeration is to be advanced.

Slurry flow characteristics numerically analysed using sand water mixture

2021 ◽  
Author(s):  
Varinder Singh ◽  
Satish Kumar ◽  
Dwarikanath Ratha
Keyword(s):  
Flow Characteristics ◽  
Water Mixture ◽  
Slurry Flow

Numerical Study on the Erosion Characteristics of U-Type Bend for Gas Solid Flow

2017 ◽  
Author(s):  
Yu Wang ◽  
Qi He ◽  
Ming Liu ◽  
Weixiong Chen ◽  
Junjie Yan
Keyword(s):  
Particle Size ◽  
Erosion Rate ◽  
Loading Rate ◽  
Pipe Wall ◽  
Numerical Study ◽  
Pulverized Coal ◽  
Mass Loading ◽  
Two Phase ◽  
Inlet Velocity ◽  
Pipe System

In pulverized coal-fired plant, the U-type bend is commonly used in flue gas and pulverized coal pipe system to due to the constraints of outer space. And gas-solid two-phase flow exists in these pipelines. The erosion of the pipe has significant effect on the safety and reliability of pipelines. In present paper, the erosion characteristics of U-type bend were investigated through CFD (Computational Fluid Dynamics) method. The wear distribution on the pipe wall was obtained. And the particle flow characteristics in U-type bend were analyzed. The influence of inlet velocity, mass loading rate and particle size on the erosion rate was studied as well. Result suggested that the maximum erosion rate increases exponentially with the increase of inlet velocity. And maximum erosion rate increases linearly with the increasing mass loading rate. Increasing particle size can aggravate the wear on the pipe wall.

Numerical simulation of hydrate slurry flow behavior in oil-water systems based on hydrate agglomeration modelling

2018 ◽  
Vol 169 ◽  
pp. 393-404 ◽  
Author(s):  
GuangChun Song ◽  
YuXing Li ◽  
WuChang Wang ◽  
Kai Jiang ◽  
Zhengzhuo Shi ◽  
...  
Keyword(s):  
Numerical Simulation ◽  
Flow Behavior ◽  
Water Systems ◽  
Slurry Flow ◽  
Oil Water

Magneto-hydrodynamics of bubbly flow in horizontal pipe: New criteria through numerical simulation

2018 ◽  
Author(s):  
Hasanain A. Abdul Wahhab ◽  
A. Rashid A. Aziz ◽  
Hussain H. Al-Kayiem ◽  
Mohammad S. Nasif ◽  
Mohammed El-Adawy
Keyword(s):  
Numerical Simulation ◽  
Bubbly Flow ◽  
Horizontal Pipe ◽  
New Criteria
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