Liang Wang

North China Electric Power University

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Feng Du

China University of Mining and Technology

Zhou Lou

China University of Mining and Technology

Xingchen Li

State Key Laboratory of Supramolecular Structure and Materials

Yousheng Lin

Yuan Ze University

Ye Bai

China Huaneng Group Co., Ltd. (China)

Xiang Zhang

China University of Mining and Technology

Kai Wang

China University of Mining and Technology

Jintuo Zhu

China University of Mining and Technology

Yanhai Wang

Wuhan Institute of Virology

Lyu Ji

Institute of Engineering Thermophysics

Cooperative Institutions

China University of Mining and Technology

Chinese Academy of Sciences

State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation

Jilin University

University of Chinese Academy of Sciences

Southwest Petroleum University

Dongguan University of Technology

Institute of Engineering Thermophysics

Southeast University

North China Electric Power University

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Bifurcate migration of neutrally buoyant particles in unilateral slippery channel flows

Physics of Fluids (2024)

Shi Tao Xilin Zhang Wenhao Wang Liang Wang Qing He

As an important technique for manipulating particles in fluid–solid channel flows, inertial focusing encourages the design of the channel geometry to enhance particle radial aggregation. Traditional methods typically use exquisite sheathes or elbows to create constricted flows, which ultimately increase flow resistance and lower fluid–solid separation efficiency. This paper presents a slippery wall modification technique that, by regulating the channel flows, is expected to induce nontrivial particle lateral migrations. More specifically, interface-resolved simulations are performed using the lattice Boltzmann method. A slip boundary condition is applied to the redesigned hydrophobic bottom wall. It is observed that the typical bifurcate migration, i.e., particles moving divergently toward the upper and lower equilibrium positions around a crucial location (CL), does not occur along the channel centerline. The CL is always below the centerline, and it decreases consistently with an increase in Kn or Re. By increasing Re, particles are prone to approach the channel centerline. With larger Kn, particles in the higher equilibrium position are affected in the same way, but their lower counterparts are drawn to the bottom wall.

Neutral buoyancy

Particle-Laden Flows

10.1063/5.0230847

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Measuring low-rate gas flows of boreholes in coal mines by the needle increasing flow rate method

Energy Exploration & Exploitation (2019)

Kai Wang Liang Wang Xiang Zhang Zhou Lou Chengpeng Xin

A novel method named the needle increasing flow rate method (NIFRM) is proposed to measure the excessively low gas flow rates of extraction boreholes in coal mines. The main idea of the NIFRM is that when the flow rate of a branch extraction pipe of the borehole is lower than the minimum measurable flow rate of the gas extraction analyzer, a needle can be inserted into the branch extraction pipe to allow some air from the roadway to rush into the branch extraction pipe to increase the flow rate temporarily; then the gas parameters are measured and calculated successfully. To verify the rationality of this method and further optimize its parameters, the software FLUENT is applied to conduct a numerical simulation. The numerical simulation results show that the methane concentration will reach a satisfying equilibrium quickly after the air is introduced into the branch extraction pipe. The range and standard deviation of the methane concentration at 1.0 m downstream of the needle are 0.05% and 0.01%, respectively. The pressure difference between the inlet and outlet of the model is less than 10 Pa, indicating that almost all of the negative pressure of the gas extraction in the main extraction pipe is transmitted to the deep part of the branch extraction pipe. From the numerical simulation results, it is safe to say that the negative effect of the increasing flow rate is completely negligible by inserting the needle in the gas extraction system. Lastly, the NIFRM was applied to study the influence of coal seam permeability anisotropy on gas extraction in a coal mine, and the method was further verified.

10.1177/0144598719857182

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Citations (2)

Investigation on the thermal energy storage characteristics in a spouted bed based on different nozzle numbers

Energy Reports (2020)

Youtian Wang Lyu Ji Bin Li Liang Wang Ye Bai

This paper presents the results of the simulations of the thermal storage and thermal release processes in a spouted bed using a self-developed computational fluid dynamics–discrete element method (CFD–DEM) model to analyze the thermal energy storage (TES) characteristics of the spouted bed with varying nozzle numbers. The thermal storage capacity, thermal release capacity and thermal storage efficiency were analyzed. Additionally, the effects of gas inlet jet number and gas flowrate on the thermal storage characteristics are discussed. The results showed that a higher number of nozzles resulted in a faster change of particle temperature, higher gas phase temperature field update rate and a higher thermal storage capacity. However, when the number of nozzles is increased from 1 to 2 and then 3, the rate of increase in total thermal storage and total thermal release decreases, and the increase in thermal release is always higher than the increase in thermal storage. When the number of nozzles is increased from one through three, the thermal efficiency increased from 52.9% to 75.6%, establishing that a higher number of nozzles improves the thermal efficiency.

Thermal energy

10.1016/j.egyr.2020.04.016

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Citations (6)

Design, Data Collection, and Driver Behavior Simulation for the Open-Mode Integrated Transportation System (OMITS)

Liang Wang

Mode (computer interface)

10.7916/d82f7n7s

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Citations (1)

Experimental study on the purification capacity of potted plants on low-concentration carbon monoxide in indoor environment

Environmental Science and Pollution Research (2023)

Jintuo Zhu Jinyu Liu Xinjian He Liang Wang Xuejing Liu

Ornamental plant

10.1007/s11356-023-31497-2

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Experimental evaluation on the damages of different drilling modes to tight sandstone reservoirs

Natural Gas Industry B (2017)

Li Gao Wuqiang Cai Yingfeng Meng Liang Wang Limin Wang

The damages of different drilling modes to reservoirs are different in types and degrees. In this paper, the geologic characteristics and types of such damages were analyzed. Then, based on the relationship between reservoir pressure and bottom hole flowing pressure corresponding to different drilling modes, the experimental procedures on reservoir damages in three drilling modes (e.g. gas drilling, liquid-based underbalanced drilling and overbalanced drilling) were designed. Finally, damage simulation experiments were conducted on the tight sandstone reservoir cores of the Jurassic Ahe Fm in the Tarim Basin and Triassic Xujiahe Fm in the central Sichuan Basin. It is shown that the underbalanced drilling is beneficial to reservoir protection because of its less damage on reservoir permeability, but it is, to some extent, sensitive to the stress and the empirical formula of stress sensitivity coefficient is obtained; and that the overbalanced drilling has more reservoir damages due to the invasion of solid and liquid phases. After the water saturation of cores rises to the irreducible water saturation, the decline of gas logging permeability speeds up and the damage degree of water lock increases. It is concluded that the laboratory experiment results of reservoir damage are accordant with the reservoir damage characteristics in actual drilling conditions. Therefore, this method reflects accurately the reservoir damage characteristics and can be used as a new experimental evaluation method on reservoir damage in different drilling modes.

Saturation (graph theory)

Underbalanced drilling

10.1016/j.ngib.2017.08.008

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Propagation feature of partial discharge UHF signal diffusing from GIS pouring aperture

2017 2nd International Conference on Power and Renewable Energy (ICPRE) (2017)

Liang Wang Rui Li Chongzhi Yin Junjie Feng Hongyi Li

It is a novel method to detect partial discharge of GIS by detecting the UHF electromagnetic wave signal diffusing from the pouring aperture in the insulator containing iron hoop. In contrast with the feature of UHF electromagnetic diffusing from the bare insulator without iron hoop, UHF electromagnetic wave diffusing from pouring aperture is undiscovered due to the tiny dimension and special configuration. In this paper, propagation feature of the UHF electromagnetic wave through the pouring aperture was analyzed by using the theory of pore electromagnetic leakage and it is simulated based on the finite difference time domain method. The conclusion is that the orientation of electric field principal component of UHF signal from the aperture is parallel to the short edge of aperture. The primary frequency range is concentrated from 0.8 to 2GHz. In addition, rangeability of the signal caused by the change of the long edge is much higher than the rangeability of the signal caused by the change of short edge.

Aperture (computer memory)

SIGNAL (programming language)

10.1109/icpre.2017.8390497

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The mechanism of rockburst-outburst coupling disaster considering the coal-rock combination: An experiment study

Geomechanics and Engineering (2020)

Feng Du Kai Wang Yangyang Guo Gongda Wang Liang Wang

With the ongoing development of deep mining of coal resources, some coal mine dynamic disasters have exhibited characteristics of both coal-gas outbursts and rockbursts. Therefore, research is required on the mechanism of rockburst-outburst coupling disaster. In this study, the failure characteristics of coal-rock combination structures were investigated using lab-scale physical simulation experiments. The energy criterion of the rockburst-outburst coupling disaster was obtained, and the mechanism of the disaster induced by the gas-solid coupling instability of the coal-rock combination structure was determined. The experimental results indicate that the damage of the coal-rock structure is significantly different from that of a coal body. The influence of the coal-rock structure should be considered in the study of rockburst-outburst coupling disaster. The deformation degree of the roof is controlled by the more significant main role of the gas pressure and the difference in the strength between the rock body and the coal body. The outburst holes and spall characteristics of the coal body after the failure of the coal-rock structure are strongly affected by the difference in strength between the roof and the coal body. The research results provide an in-depth understanding of the mechanism of rockburst-outburst coupling disasters in deep mining.

Spall

10.12989/gae.2020.22.3.255

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Citations (12)

Test-Bed Performance of an Ice-Coring Drill Used with a Hot Water Drilling System

Journal of Marine Science and Engineering (2019)

An Liu Rusheng Wang Xiaopeng Fan Yang Yang Xingchen Li

Ice cores from ice shelves contain abundant paleoclimatic information and provide essential information concerned with the prediction of future climatic change and global sea level variations. Efficient retrieval of ice cores is always an engineering challenge in polar ice and marine research. Here, we present design and other information of a new hot-water ice-coring drill used in combination with a hot-water drilling system that provides a rapid and environmentally friendly ice coring system. The coring system shares the surface equipment and hydraulic hose with the hot-water drilling system. Tests with the drill were carried out at an ice drill testing facility, and theoretical estimations were performed to predict the rate of penetration (ROP) and water flow rates. The results indicate the optimal water temperature for ice-coring to be 50 °C, and the most suitable water flow rate to be from 42 L/min to 55 L/min. With those drilling parameters, the maximum ROP is 27.8 m/h and the ice cores are 55–59 mm in diameter.

Coring

Penetration rate

Ice core

10.3390/jmse7070234

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Citations (3)

Direct numerical simulation of the sedimentation of a particle pair in a shear-thinning fluid

Physical Review Fluids (2020)

Xitong Zhang Haihu Liu Ya Zhang Liang Wang

Sedimentation of a particle pair in a shear-thinning fluid is studied for varying generalized Archimedes number. Unlike in the Newtonian fluid, one more group of multiple stable states is identified, and the drafting-kissing-tumbling state disappears when the shear-thinning effect is strong enough.

Shear thinning

Sedimentation

Thinning

Particle (ecology)

10.1103/physrevfluids.5.014304

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Citations (12)