NUMERICAL SIMULATION OF FLUID BEHAVIORS UNDER INFLUENCING FACTORS OF CRYOGENIC CAPILLARY-FLOW UNDER MICROGRAVITY

2017 ◽  
Author(s):  
Rong Ma ◽  
Wei Yao ◽  
Chao Wang ◽  
Xiaochen Lu
Keyword(s):  
Numerical Simulation ◽  
Influencing Factors ◽  
Capillary Flow

Numerical Simulation Study on the Key Influencing Factors of Water-Invasion Performance for the Gas Wells with Bottom-Water

2014 ◽  
Vol 884-885 ◽  
pp. 104-107
Author(s):  
Zhi Jun Li ◽  
Ji Qiang Li ◽  
Wen De Yan
Keyword(s):  
Numerical Simulation ◽  
Influencing Factors ◽  
Bottom Water ◽  
Simulation Method ◽  
Gas Production ◽  
Production Performance ◽  
Gas Wells ◽  
Two Phase ◽  
Gas Well ◽  
Water Gas

For the water-sweeping gas reservoir, especially when the water-body is active, water invasion can play positive roles in maintaining formation pressure and keeping the gas well production. But when the water-cone break through and towards the well bottom, suffers from the influencing of gas-water two phase flows, permeability of gas phase decrease sharply and will have a serious impact on the production performance of the gas well. Moreover, the time when the water-cone breakthrough will directly affect the final recovery of the gas wells, therefore, the numerical simulation method is used to conduct the research on the key influencing factors of water-invasion performance for the gas wells with bottom-water, which is the basis of the mechanical model for the typical gas wells with bottom-water. It indicate that as followings: (1) the key influencing factors of water-invasion performance for the gas wells with bottom-water are those, such as the open degree of the gas beds, well gas production and the amount of Kv/Kh value; and (2) the barrier will be in charge of great significance on the water-controlling for the bottom water gas wells, and its radius is the key factor to affect water-invasion performance for the bottom water gas wells where the barriers exist nearby.

An Analysis on Influencing Factors of Interlayer Separation of Complex Roof in Deep Coal Mining

2010 ◽  
Vol 146-147 ◽  
pp. 976-979
Author(s):  
De Yi Wu ◽  
Ai Lang Wang ◽  
Hua Qiang Liang
Keyword(s):  
Numerical Simulation ◽  
Normal Stress ◽  
Coal Mining ◽  
Influencing Factors ◽  
Friction Angle ◽  
Rock Stress ◽  
Roof Collapse ◽  
Tunnel Width ◽  
Original Rock

In order to control construction face instability of complex roof and predict roof collapse in deep coal mining, by numerical simulation, distribution of normal stress and interlayer separation of construction surface were calculated and influencing factors on separation of construction surface were analyzed in different conditions. The conclusions were drawn that original rock stress, rock characters, rock thickness and tunnel width had obvious influence and cohesion and friction angle of construction surface had little influence on separation of construction surface.

Analysis of Influences of Weak Joints and Confining Pressure on Rock Mass Strength by Numerical Simulation

2013 ◽  
Vol 438-439 ◽  
pp. 607-611 ◽  
Author(s):  
Da Hai Wang ◽  
Hao Ran Guo ◽  
Hui Zhao ◽  
Yan Wei Guo
Keyword(s):  
Numerical Simulation ◽  
Rock Mass ◽  
Plastic Zone ◽  
Influencing Factors ◽  
Rock Strength ◽  
Strain Softening ◽  
Confining Pressure ◽  
Plasticity Model ◽  
Rock Mass Strength

Principal influencing factors of the strength of rock mass with weak joints were studied in this paper. Dip angles of weak joints in addition with the confining pressure is studied based on strain-softening/hardening plasticity model. The broken mechanism from the perspective of plastic zone was analyzed. The strength of rock mass with weak joints is mainly under control of the joints occurrence, the joints dip and the rock strength, and great influenced by the confining pressure. A higher strength is obtained with a higher confining pressure, the broken mechanisms varies with different joints dips.

scholarly journals Girder Longitudinal Movement and Its Factors of Suspension Bridge under Vehicle Load

2021 ◽  
Vol 2021 ◽  
pp. 1-14
Author(s):  
Guoping Huang ◽  
Jianhua Hu ◽  
Haibo Liu ◽  
Xiugui Sun
Keyword(s):  
Numerical Simulation ◽  
Influencing Factors ◽  
Longitudinal Vibration ◽  
Suspension Bridge ◽  
Field Monitoring ◽  
Longitudinal Motion ◽  
Longitudinal Deformation ◽  
Main Cable ◽  
Longitudinal Response ◽  
Vehicle Load

Vehicle load may not only cause vertical deformation and vibration of suspension bridge but also lead to longitudinal deformation and vibration. And the longitudinal behavior is closely related to the durability of the girder end devices and the bending fatigue failure of suspenders. In this study, the longitudinal deformation behavior and longitudinal vibration of suspension bridge under vehicles, as well as the related influencing factors, are investigated. The underlying mechanism of girder longitudinal movement under the moving vehicles is revealed. Based on the simplified vehicle model of vertical concentrated force, the characteristics of main cable deformation and girder longitudinal displacement under vertical loads are analyzed first. Then, the longitudinal motion equation of the girder under vertical moving loads is derived. Finally, a single long-span suspension bridge is employed in the case study, and the girder longitudinal response and influencing factors are investigated based on both numerical simulation and field monitoring. Results indicate that the asymmetric vertical load leads to cable longitudinal deflection owing to the geometrically nonlinear characteristic of the main cable, leading to longitudinal movement of the girder. The results of field monitoring and numerical simulation indicate that the girder moves quasi-statically and reciprocates longitudinally with centimeter amplitude under normal operational loads.

Numerical simulation of the abrasive supercritical carbon dioxide jet: The flow field and the influencing factors

2016 ◽  
Vol 28 (2) ◽  
pp. 238-246 ◽  
Author(s):  
Zhen-guo He ◽  
Gen-sheng Li ◽  
Hai-zhu Wang ◽  
Zhong-hou Shen ◽  
Shou-ceng Tian ◽  
...  
Keyword(s):  
Carbon Dioxide ◽  
Numerical Simulation ◽  
Supercritical Carbon Dioxide ◽  
Flow Field ◽  
Influencing Factors ◽  
Supercritical Carbon

scholarly journals Numerical Simulation and Experimental Analysis of Microstructure of Magnetorheological Fluid

2019 ◽  
Vol 2019 ◽  
pp. 1-17 ◽  
Author(s):  
Dongsheng Ji ◽  
Yiping Luo ◽  
Hongjuan Ren ◽  
Dan Wei ◽  
Jun Shao
Keyword(s):  
Numerical Simulation ◽  
Influencing Factors ◽  
Shear Force ◽  
Magnetic Particles ◽  
Deep Understanding ◽  
Magnetorheological Fluid ◽  
Point Of View ◽  
Macroscopic Properties ◽  
New Type ◽  
Numerical Calculation Method

Magnetorheological fluid is a new type of smart material that is sensitive to magnetic fields and has controllable performance. It is widely regarded for its unique magnetorheological effect and good rheological properties. For materials, the microstructure determines its macroscopic properties. In order to better study its macroscopic properties, it is necessary to have a more comprehensive understanding and deep understanding of its microstructure. In this paper, the magnetization process of magnetorheological fluid is analyzed from a microscopic point of view. Based on Newton’s second law, the dynamic model of particle motion is established. The magnetic force, repulsive force, and viscous resistance of magnetic particles are analyzed. The finite difference numerical calculation method is used. The velocity-Verlet algorithm simulates the static microstructure chaining process of the magnetorheological fluid and the dynamic chaining process under shear force under different influencing factors. At the same time, a static observation device and a shear observation device were developed to observe the microstructure chaining morphology of magnetorheological fluid under different influencing factors, and to study the dynamic chaining law of magnetorheological fluid under the action of a shear force. Therefore, a reasonable contrast index is established, and the numerical simulation results are compared with the experimental observation results.

Seismic Behavior of Coupled Eco-Composite Wall

2015 ◽  
Vol 744-746 ◽  
pp. 279-282
Author(s):  
Li Na Hou ◽  
Bao Jun Wen
Keyword(s):  
Numerical Simulation ◽  
Numerical Analysis ◽  
Influencing Factors ◽  
Seismic Behavior ◽  
Concrete Strength ◽  
Low Frequency ◽  
Shear Capacity ◽  
Wall Structure ◽  
Steel Bar ◽  
Composite Wall

Coupled eco-composite wall is one of the most commonly used lateral-load resisting member in eco-composite wall structure. The test of a coupled eco-composite wall under low-frequency cyclic loading is carried out to study the seismic behavior of the coupled eco-composite wall. At the same time, the main influencing factors of shear capacity for the wall are analyzed by numerical simulation. Experimental results and numerical analysis show that: the coupled eco-composite wall has better seismic performance in contrast with the standard wall, and such factors as shear-span ratio, ribbed steel bar, block strength, section height and reinforced area of end column and concrete strength of end frame column are the main influencing factors of shear capacity 。

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