On High Pressure Squeeze Pack Numerical Simulation of Unconsolidated Sandstone Based on Discrete Element

2010 ◽  
Vol 34-35 ◽  
pp. 1666-1670
Author(s):  
Wei Zhang Wang ◽  
Xiang Zhen Yan
Keyword(s):  
Numerical Simulation ◽  
High Pressure ◽  
Flow Simulation ◽  
Discrete Element ◽  
Simulation Software ◽  
Oil Reservoir ◽  
Control Technology ◽  
Sand Control ◽  
Grain Flow ◽  
Element Theory

Sand inflow is one of the problems in unconsolidated sandstone oil reservoir recovery. The most frequently applied sandcontrol method is high-pressure gravel squeeze packing sand control technology. But incorrect knowledge of stratum shapes under high-pressure squeeze packing leads to unreasonable technology and implement parameters. This thesis, based on the discrete element theory and by means of two-dimension grain flow simulation software PFC2D, considers three oil wells with unconsolidated sandstone in terms of their cementing strengths . The simulation result shows that strata with diverse cementing strengths vary remarkably when high-pressure squeeze pack is asserted. Established calculation pattern might lead to sizable deviation.

scholarly journals Analysis and Optimisation of High Pressure Die Casting Parameters to Achieve Six Sigma Quality Product Using Numerical Simulation Approach

2021 ◽  
Vol 11 (1) ◽  
pp. 97-109
Author(s):  
Suraj R. Marathe ◽  
Dr. Carmo E. Quadros
Keyword(s):  
Numerical Simulation ◽  
High Pressure ◽  
Molten Metal ◽  
Die Casting ◽  
Injection Pressure ◽  
Simulation Software ◽  
Holding Time ◽  
Simulation Approach ◽  
High Pressure Die Casting ◽  
Pressure Die Casting

A numerical simulation approach is proposed to predict the optimal parameter setting during high pressure die casting. The contribution from the optimal parameters, the temperature, showed more influence on the casting quality than the other parameters. This study’s outcome was beneficial for finding the solution for casting defects that occurs due to incorrect setting of process parameters in die casting. Thus, a combination of numerical optimisation techniques and casting simulation serves as a tool to improve the casting product quality in die casting industries. This paper aims to analyse and optimise critical parameters like injection pressure, molten metal temperature, holding time, and plunger velocity, contributing to the defects. In this research paper, an effort has been made to give optimal pressure, temperature, holding time, and plunger velocity parameters using ProCAST simulation software that uses finite element analysis technology. Numerical analysis for optimising the parameters by varying the temperature of molten metal, injection pressure, holding time, and plunger velocity,  concerning solidification time at hot spots, is an essential parameter for studying the defect analysis in the simulated model.

Numerical Simulation of Gas Pipe with High Temperature and High Pressure

2015 ◽  
Vol 733 ◽  
pp. 489-492
Author(s):  
Jin Mei Liu ◽  
Ting Shao ◽  
Guo Qiang Zhou ◽  
Guo Wei Zhang
Keyword(s):  
Numerical Simulation ◽  
High Pressure ◽  
High Temperature ◽  
Simulation Analysis ◽  
Coupling Effect ◽  
Thermal Structure ◽  
Outer Wall ◽  
Coupling Model ◽  
Steady State Heat ◽  
Element Theory

Aiming to characteristics of structure and transmitting medium of gas pipe with high temperature and high pressure, considering the coupling effect of static pressure and temperature, the thermal structure coupling model based on steady-state heat conduction is established according to the finite element theory. So method and process of numerical simulation on thermal structure coupling analysis are proposed. Simulation analysis is carried out for the gas pipe of a dry-gas compressor. The variation characteristic of inner-outer wall is revealed under the different temperature. The results indicate that the numerical modeling and simulation of thermal structure coupling of gas pipe with high temperature and high pressure can be realized. It can provide valuable reference opinions for site construction, real-time monitoring and safety analysis of pipe.

scholarly journals Numerical simulation on coal loading process of shearer drum based on discrete element method

2021 ◽  
pp. 014459872110135
Author(s):  
Zhen Tian ◽  
Shuangxi Jing ◽  
Lijuan Zhao ◽  
Wei Liu ◽  
Shan Gao
Keyword(s):  
Numerical Simulation ◽  
Discrete Element Method ◽  
Loading Rate ◽  
Low Cost ◽  
Element Model ◽  
Discrete Element ◽  
Helix Angle ◽  
Loading Process ◽  
Coal Particles ◽  
Element Method

The drum is the working mechanism of the coal shearer, and the coal loading performance of the drum is very important for the efficient and safe production of coal mine. In order to study the coal loading performance of the shearer drum, a discrete element model of coupling the drum and coal wall was established by combining the results of the coal property determination and the discrete element method. The movement of coal particles and the mass distribution in different areas were obtained, and the coal particle velocity and coal loading rate were analyzed under the conditions of different helix angles, rotation speeds, traction speeds and cutting depths. The results show that with the increase of helix angle, the coal loading first increases and then decreases; with the increase of cutting depth and traction speed, the coal loading rate decreases; the increase of rotation speed can improve the coal loading performance of drum to a certain extent. The research results show that the discrete element numerical simulation can accurately reflect the coal loading process of the shearer drum, which provides a more convenient, fast and low-cost method for the structural design of shearer drum and the improvement of coal loading performance.

scholarly journals Discrete Element Analysis of High-Pressure Zones of Sea Ice on Vertical Structures

2021 ◽  
Vol 9 (3) ◽  
pp. 348
Author(s):  
Xue Long ◽  
Lu Liu ◽  
Shewen Liu ◽  
Shunying Ji
Keyword(s):  
High Pressure ◽  
Sea Ice ◽  
Failure Mode ◽  
Contact Area ◽  
Loading Rate ◽  
Discrete Element ◽  
Offshore Platforms ◽  
Marine Structures ◽  
Element Analysis ◽  
Ice Pressure

In cold regions, ice pressure poses a serious threat to the safe operation of ship hulls and fixed offshore platforms. In this study, a discrete element method (DEM) with bonded particles was adapted to simulate the generation and distribution of local ice pressures during the interaction between level ice and vertical structures. The strength and failure mode of simulated sea ice under uniaxial compression were consistent with the experimental results, which verifies the accuracy of the discrete element parameters. The crushing process of sea ice acting on the vertical structure simulated by the DEM was compared with the field test. The distribution of ice pressure on the contact surface was calculated, and it was found that the local ice pressure was much greater than the global ice pressure. The high-pressure zones in sea ice are mainly caused by its simultaneous destruction, and these zones are primarily distributed near the midline of the contact area of sea ice and the structure. The contact area and loading rate are the two main factors affecting the high-pressure zones. The maximum local and global ice pressures decrease with an increase in the contact area. The influence of the loading rate on the local ice pressure is caused by the change in the sea ice failure mode. When the loading rate is low, ductile failure of sea ice occurs, and the ice pressure increases with the increase in the loading rate. When the loading rate is high, brittle failure of sea ice occurs, and the ice pressure decreases with an increase in the loading rate. This DEM study of sea ice can reasonably predict the distribution of high-pressure zones on marine structures and provide a reference for the anti-ice performance design of marine structures.

scholarly journals Research and application of solid-liquid dual material sand control technology

2021 ◽  
Vol 632 ◽  
pp. 022057
Author(s):  
Huaiwen Li ◽  
Wei Liu ◽  
Lifei Shao ◽  
Xiaofang Wang ◽  
Chao Wang ◽  
...  
Keyword(s):  
Control Technology ◽  
Sand Control ◽  
Solid Liquid ◽  
Dual Material
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