Jimiao Duan
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View article: Numerical Simulation of Flow-Field Characteristics of a Submerged Pre-Mixed Abrasive Water Jet Impinging on a Wall
Numerical Simulation of Flow-Field Characteristics of a Submerged Pre-Mixed Abrasive Water Jet Impinging on a Wall Open
To investigate the flow-field characteristics of a submerged pre-mixed abrasive water jet impinging on a wall, a physical model of the conical–cylindrical nozzle and computation domain of a submerged pre-mixed abrasive-water-jet flow field…
View article: MonitorVLM:A Vision Language Framework for Safety Violation Detection in Mining Operations
MonitorVLM:A Vision Language Framework for Safety Violation Detection in Mining Operations Open
Industrial accidents, particularly in high-risk domains such as surface and underground mining, are frequently caused by unsafe worker behaviors. Traditional manual inspection remains labor-intensive, error-prone, and insufficient for larg…
View article: Study on the Competition Mechanism Between Capillary Effect and Insulation Effect of Porous Media Substrate on Fuel Combustion
Study on the Competition Mechanism Between Capillary Effect and Insulation Effect of Porous Media Substrate on Fuel Combustion Open
The combustion of liquid fuels that have leaked into inert porous media, such as sand, is a critical issue for industrial safety and fire risk assessment. Despite its importance, the complex influence of porous media on the combustion proc…
View article: Near-Nozzle Atomization Characteristics in Air-Assisted Spraying: Integrated VOF-DPM Modeling and Experimental Validation
Near-Nozzle Atomization Characteristics in Air-Assisted Spraying: Integrated VOF-DPM Modeling and Experimental Validation Open
Near-nozzle atomization characteristics in air-assisted spraying were investigated through a novel 3D transient model integrating Volume-of-Fluid and Large Eddy Simulation (VOF-DPM) methods, with experimental validation of droplet distribu…
View article: Influence of Oil Components on the Wax Deposition of Heavy Oil
Influence of Oil Components on the Wax Deposition of Heavy Oil Open
The high content of heavy components and poor fluidity of heavy oil present a substantial challenge to its efficient transportation in the petroleum industry. Diluting heavy oil with light oil is one of the approaches utilized to improve i…
View article: Numerical Simulation Study on Sedimentary Characteristics of Nondiagenetic Hydrates
Numerical Simulation Study on Sedimentary Characteristics of Nondiagenetic Hydrates Open
This study investigates the effects of flow velocity, hydrate volume fraction, and sand content on the deposition characteristics of noncementing hydrate particles in pipelines using ANSYS Fluent. Simulations analyzed key locations within …
View article: Numerical Investigation of Film Formation Characteristics and Mechanisms through Airless Spraying on Spherical Surfaces
Numerical Investigation of Film Formation Characteristics and Mechanisms through Airless Spraying on Spherical Surfaces Open
This paper focuses on key engineering issues, particularly the overall turbulent transport of paint spray and coating film distribution characteristics, in the process of airless spraying film formation. By deeply considering the geometric…
View article: Flow Characteristics of Oil-Carrying by Water in Downward-Inclined and Horizontal Mobile Pipeline
Flow Characteristics of Oil-Carrying by Water in Downward-Inclined and Horizontal Mobile Pipeline Open
After transporting oil with a mobile pipeline, it is necessary to empty the oil within the pipeline. A common method is to inject water into the inlet to push the oil out. However, due to the effects of buoyancy and surface tension, the oi…
View article: Pour Point Prediction Method for Mixed Crude Oil Based on Ensemble Machine Learning Models
Pour Point Prediction Method for Mixed Crude Oil Based on Ensemble Machine Learning Models Open
Pipelines are the most common way to transport crude oil. The crude oil developed from different fields is mixed first and then transported. The pour point of mixed crude oil is very important for pipeline schemes and ensuring the safe, ef…
View article: Research on Film Formation Characteristics by Spraying on Unidiameter Vertical Interpenetrating Cylindrical Surfaces
Research on Film Formation Characteristics by Spraying on Unidiameter Vertical Interpenetrating Cylindrical Surfaces Open
Unidiameter Vertical Interpenetrating Cylindrical Surfaces (UVICS, also called T-pipe surfaces) are a type of typical complex surface that exists in facilities or equipment such as oil storage tanks and industrial pipelines. The shape and …
View article: Oil–Water Hydrodynamics Model during Oil Displacement by Water in Down-Hill Mobile Pipeline
Oil–Water Hydrodynamics Model during Oil Displacement by Water in Down-Hill Mobile Pipeline Open
In the process of water displacing oil within mobile pipelines, it is common that the oil tends to accumulate at the elevated sections of inclined pipelines, leading to an issue of residual oil accumulation. In this paper, the mechanism of…
View article: Gas-Liquid Hydrodynamics during Liquid Displacement by Gas in Up-Hill Pipeline
Gas-Liquid Hydrodynamics during Liquid Displacement by Gas in Up-Hill Pipeline Open
Mobile pipelines are the most efficient and reliable way to transport large quantities of oil over long distances in warfare, rescue and disaster relief. The oil in the pipe must be discharged and recovered when the oil transfer task is co…
View article: A Review of the Developments of the Characteristics and Mechanisms of Airless Spraying on Complex Surfaces
A Review of the Developments of the Characteristics and Mechanisms of Airless Spraying on Complex Surfaces Open
The special surface appearance of complex surfaces restricts the coating film quality of spraying. The study of the atomization and film formation characteristics of typical complex surfaces, as well as the spraying mechanism, is essential…
View article: Numerical Model of the Critical Gas Velocity for Liquid Displacement from the Lower Section of an Upward-Sloping Pipe
Numerical Model of the Critical Gas Velocity for Liquid Displacement from the Lower Section of an Upward-Sloping Pipe Open
Mobile pipelines are the most efficient and reliable tools for transporting a large amount of oil over long distances in combat, emergency rescue and disaster relief situations. In the completion of oil transfer or pipeline maintenance, th…
View article: Review of Oil–Water Flow Characteristics of Emptying by Water Displacing Oil in Mobile Pipelines
Review of Oil–Water Flow Characteristics of Emptying by Water Displacing Oil in Mobile Pipelines Open
Water displacing oil is one of the main emptying methods for mobile pipelines. It has the advantages of being a simple process and highly safe. At present, the determination of a water displacing oil scheme of mobile pipelines is based on …
View article: Wax deposition modeling in oil-water stratified pipe flow
Wax deposition modeling in oil-water stratified pipe flow Open
Wax deposition in oil-water stratified flow is commonly encountered onshore and offshore oil production pipe systems, and typically reduces transportation capacity of oil. The accurate predicted model of wax deposition has becomes an indis…
View article: Experimental Study on Gas–Liquid Interface Evolution during Liquid Displaced by Gas of Mobile Pipeline
Experimental Study on Gas–Liquid Interface Evolution during Liquid Displaced by Gas of Mobile Pipeline Open
The mobile pipeline is the most effective and reliable means for the emergency oil transfer task, which is temporarily laid on the field. After completing the task, the oil in the pipeline should be emptied before the mobile pipeline is re…
View article: Slug Flow Hydrodynamics Modeling for Gas–Liquid Two-Phase Flow in a Pipe
Slug Flow Hydrodynamics Modeling for Gas–Liquid Two-Phase Flow in a Pipe Open
Gas–liquid flow in a pipeline is a very common. Slug two-phase flow is dominated in the case of slightly upward flow (+0.25°) and considered to be the comprehensive flow configuration, and can be in close contact with all the other flow pa…
View article: Experimental Measurements of Wax Precipitation Using a Modified Method of Simultaneous Centrifugation and High-Temperature Gas Chromatography
Experimental Measurements of Wax Precipitation Using a Modified Method of Simultaneous Centrifugation and High-Temperature Gas Chromatography Open
Wax precipitation and deposition are serious flow assurance problems. Wax precipitation is investigated simultaneously using centrifugation and high-temperature gas chromatography (C-HTGC) to obtain the amount and component distribution of…
View article: Wax deposition model of heavy oil in pipeline transportation
Wax deposition model of heavy oil in pipeline transportation Open
During the transportation process of heavy oil, wax deposition is prone to occur for the low temperature outside the tube and strong heat exchange, which will adversely affect the pipeline transportation of heavy oil. Based on the experime…
View article: Study of the Comprehensive Kinetic Model of Natural Gas Hydrate Formation in a Water-in-Oil Emulsion Flow System
Study of the Comprehensive Kinetic Model of Natural Gas Hydrate Formation in a Water-in-Oil Emulsion Flow System Open
Hydrate growth is influenced by many factors, including thermodynamics, kinetics, mass and heat transfer, and so on. There is thus a practical significance in establishing a model that comprehensively considers these influencing factors fo…
View article: A model of wax deposition under oil-gas two-phase stratified flow in horizontal pipe
A model of wax deposition under oil-gas two-phase stratified flow in horizontal pipe Open
A model of wax deposition based on molecular diffusion mechanism, for oil-gas two-phase stratified pipe flow is developed. In the model, unidirectional fully developed flow analyses of momentum, heat and mass transfer are presented. And, a…
View article: Numerical simulation of heat transfer between low pressure pipeline of pre-mixed abrasive water jet system and low temperature environment
Numerical simulation of heat transfer between low pressure pipeline of pre-mixed abrasive water jet system and low temperature environment Open
The physical model of low pressure pipeline of pre-mixed abrasive water jet system is established.Based on the software of FLUENT, the numerical simulation of heat transfer between low pressure pipeline of pre-mixed abrasive water jet syst…
View article: Study on Influence of Fluid Parameters on Axial Coupled Vibration of Pipeline Conveying Multiphase Flow
Study on Influence of Fluid Parameters on Axial Coupled Vibration of Pipeline Conveying Multiphase Flow Open
Taking a slurry reservoir-pipeline-valve system as research object, axial dynamic vibrations of pipe system were induced by coupled hydraulic transient due to rapid closure of valve at the end of pipe. The influences of fluid parameters in…