Experimental Study of Down Hole Gas Liquid Separators

2009 ◽  
Author(s):  
Zunce Wang ◽  
Sen Li ◽  
Fengxia Lv ◽  
Yan Xu ◽  
Jinlong Zhang
Keyword(s):  
Flow Rate ◽  
Cfd Simulation ◽  
Structural Parameters ◽  
Cone Angle ◽  
Field Tests ◽  
Operating Parameters ◽  
Separation Performance ◽  
Liquid Ratio ◽  
Gas Well ◽  
Computational Fluid Dynamics Cfd

The technology of Down-hole Gas Liquid Separation and Water Re-injection (DGLSWR) is an economical and effective method to solve gas well fluid accumulation. The separation performance of designed Down-hole Gas Liquid Separator (DGLS) is very important for DGLSWR systems applications. The principle of work and Characteristics of DGLSWR systems are introduced in this paper. Separation performance of DGLS was studied using computational fluid dynamics (CFD) simulation combining laboratory experiment. Relations of main operating parameters, such as flow rate and gas liquid ratio with pressure drop were studied. The effect of flow rate, gas liquid ratio and main structural parameters such as cone angle and exhaust on DGLS separation performance was also studied. Appropriate structure and operating parameters were determined. Field tests indicated satisfactory results as well.

scholarly journals Effects of Operating Parameters on Ionic Liquid Membrane to Remove Humidity in a Green Continuous Process

Membranes ◽  
2019 ◽  
Vol 9 (5) ◽  
pp. 65
Author(s):  
Xueru Yan ◽  
Alexandre Favard ◽  
Stéphane Anguille ◽  
Marc Bendahan ◽  
Philippe Moulin
Keyword(s):  
Ionic Liquid ◽  
Flow Rate ◽  
Continuous Process ◽  
Hybrid Process ◽  
Absolute Pressure ◽  
Mechanical Resistance ◽  
Operating Parameters ◽  
Separation Performance ◽  
Feed Concentration ◽  
Time Operation

Membrane processes are promising methods to separate gases from feed streams without phase changing. A hybrid process, the combination of ionic liquids with a ceramic membrane (ILM), has been developed for humidity removal in a green continuous process. This new concept provides a more efficient and available ionic liquid (IL)-based membrane regeneration process, which just switches the moist feed stream to dry air. Furthermore, the ILM presents high stability and mechanical resistance during long-time operation. In addition, the influences of several operating parameters, including flow rate, temperature, absolute pressure, and feed concentration on process efficiency were investigated. The lower inlet flow rate was found to be favorable for drying humid air. Moreover, when the pressure increased, the mass of absorbed water was increased, while the feed concentration had no significant effects on the membrane separation performance. However, the operating temperature had a great effect on humidity removal. It is necessary to note that the processes at room temperature can limit the energy consumption. The absorbing process of ILM remained efficient after several absorption desorption cycles. Therefore, the new ILM hybrid process that has been developed has great potential for consecutive humidity removal processes.

Research on CFD Simulation of the Cement Slurry Mixer

2012 ◽  
Vol 621 ◽  
pp. 196-199
Author(s):  
Shui Ping LI ◽  
Ya Li Yuan ◽  
Lu Gang Shi
Keyword(s):  
Flow Field ◽  
High Performance ◽  
Cfd Simulation ◽  
Structural Parameters ◽  
Internal Flow ◽  
Simulation Method ◽  
Cement Slurry ◽  
Fluid Machinery ◽  
Computational Fluid Dynamics Cfd ◽  
Machinery Design

Numerical simulation method of the internal flow field of fluid machinery has become an important technology in the study of fluid machinery design. In order to obtain a high-performance cement slurry mixer, computational fluid dynamics (CFD) techniques are used to simulate the flow field in the mixer, and the simulation results are studied. According to the analysis results, the structural parameters of the mixer are modified. The results show the mixer under the revised parameters meet the design requirements well. So CFD analysis method can shorten design period and provide valuable theoretical guidance for the design of fluid machinery.

Numerical Investigation on Ventilation Strategy for Laboratories: An Approach to Control Thermal Comfort and Air Quality Using Active Chilled Beams

2007 ◽  
Author(s):  
Farhad Memarzadeh ◽  
Jane Jiang ◽  
Andy Manning
Keyword(s):  
Air Quality ◽  
Thermal Comfort ◽  
Flow Rate ◽  
Cfd Simulation ◽  
Washington Dc ◽  
Ventilation Strategy ◽  
Flow Rates ◽  
Beam System ◽  
Computational Fluid Dynamics Cfd ◽  
Lower Flow Rate

Laboratories are usually equipment intensive. The supply flow rates required to cool these laboratories are generally higher than in a less equipment intensive zone of the building. The thermal comfort of occupants in laboratories can be controlled by the choice of ventilation strategy. This study employs Computational Fluid Dynamics (CFD) simulation to assess the performance of active chilled beams in a general laboratory layout with some equipment intensive areas and the removal effectiveness of such a system. The chilled beam performance is also compared with at of ceiling diffusers. The results from this study show that the chilled beams improve thermal comfort, and they can be operated at as low as 4 ACH while maintaining very satisfactory average PPD (around 10%) in the occupied zones. The chilled beam system also improves removal effectiveness because of the inherent higher total supply flow rate that results in a better mixing in the room than ceiling diffusers. The chilled beams in the cases studied are seen to have an insignificant effect on the hood containment. As satisfactory thermal comfort and air quality can be achieved at a lower flow rate in comparison with all-air ceiling diffusers, a 14% saving is estimated in annual energy cost for cooling and ventilating a typical lab in the Washington DC area.

scholarly journals CFD Simulation of Airflow Dynamics During Cough Based on CT-Scanned Respiratory Airway Geometries

Symmetry ◽  
2018 ◽  
Vol 10 (11) ◽  
pp. 595 ◽  
Author(s):  
Guiyue Kou ◽  
Xinghu Li ◽  
Yan Wang ◽  
Mouyou Lin ◽  
Yuping Zeng ◽  
...  
Keyword(s):  
Flow Rate ◽  
Cfd Simulation ◽  
Peak Flow ◽  
Maximum Velocity ◽  
Flow Distribution ◽  
Peak Flow Rate ◽  
Respiratory Airway ◽  
Computational Fluid Dynamics Cfd ◽  
Left And Right ◽  
Cfd Method

The airflow dynamics observed during a cough process in a CT-scanned respiratory airway model were numerically analyzed using the computational fluid dynamics (CFD) method. The model and methodology were validated by a comparison with published experimental results. The influence of the cough peak flow rate on airflow dynamics and flow distribution was studied. The maximum velocity, wall pressure, and wall shear stress increased linearly as the cough peak flow increased. However, the cough peak flow rate had little influence on the flow distribution of the left and right main bronchi during the cough process. This article focuses on the mathematical and numerical modelling for human cough process in bioengineering.

scholarly journals Assessment of Different Pressure Drop-Flow Rate Equations in a Pressurized Porous Media Filter for Irrigation Systems

Water ◽  
2021 ◽  
Vol 13 (16) ◽  
pp. 2179
Author(s):  
Jonathan Graciano-Uribe ◽  
Toni Pujol ◽  
Jaume Puig-Bargués ◽  
Miquel Duran-Ros ◽  
Gerard Arbat ◽  
...  
Keyword(s):  
Porous Media ◽  
Pressure Drop ◽  
Flow Rate ◽  
Cfd Simulation ◽  
Silica Sand ◽  
Rate Equations ◽  
Uncertainty Range ◽  
Head Losses ◽  
Computational Fluid Dynamics Cfd ◽  
Drop Flow

The small open area available at the slots of underdrains in pressurized granular bed filters for drip irrigation implies: (1) the existence of a region with non-uniform flow, and (2) local values of modified particle Reynolds number >500. These flow conditions may disagree with those accepted as valid for common pressure drop-flow rate correlations proposed for packed beds. Here, we carried out detailed computational fluid dynamics (CFD) simulations of a laboratory filter to analyze the results obtained with five different equations of head losses in porous media: (1) Ergun, (2) Darcy-Forchheimer, (3) Darcy, (4) Kozeny-Carman and (5) power function. Simulations were compared with experimental data at different superficial velocities obtained from previous studies. Results for two silica sand media indicated that all equations predicted total filter pressure drop values within the experimental uncertainty range when superficial velocities <38.3 m h−1. At higher flow rates, Ergun equation approximated the best to the observed results for silica sand media, being the expression recommended. A simple analytical model of the pressure drop along flow streamlines that matched CFD simulation results was developed.

Optimization of Quench Tank Structure Based on CFD Simulation

2006 ◽  
Vol 118 ◽  
pp. 363-368 ◽  
Author(s):  
Nai Lu Chen ◽  
Wei Min Zhang ◽  
Qiang Li ◽  
Chang Yin Gao ◽  
Bo Liao ◽  
...  
Keyword(s):  
Fluid Dynamics ◽  
Flow Rate ◽  
Cfd Simulation ◽  
Draft Tube ◽  
Structure Design ◽  
Rate Distribution ◽  
Large Size ◽  
Solid Foundation ◽  
Computational Fluid Dynamics Cfd ◽  
Simulation Results

In order to investigate the flow rate distribution and improve the flow rate uniformity of the quenchant in a quench tank, the ultrasonic Doppler velocimeter (UDV) was used to measure the flow rate of quenchant with agitation, and then a computational fluid dynamics (CFD) simulation was carried out to simulate the flow rate distribution without / with flow baffles. According to the CFD simulation results, the structures and positions of flow baffles in the draft-tube were optimized to obtain the uniform flow rate distribution in the quench zone, which were verified by experiments as well. The simulation and experimental results show that the UDV is suitable for measuring the flow rate of a large-size quench tank. This research provided a solid foundation for optimizing the structure design of flow baffles in production quench tanks.

Effects of Geometric and Operating Parameters on the Separation Performance of Air-Injected De-Oil Hydrocyclone

2006 ◽  
Author(s):  
Lixin Zhao ◽  
Minghu Jiang ◽  
Feng Li ◽  
Hua Song ◽  
Shumeng Liu
Keyword(s):  
Produced Water ◽  
Field Tests ◽  
Field Research ◽  
Operating Conditions ◽  
Separation Performance ◽  
Liquid Ratio ◽  
Split Ratio ◽  
Optimum Diameter ◽  
Vortex Finder ◽  
Treatment Facilities

A new type hydrocyclone, air-injected de-oil hydrocyclone (AIDOH), was developed. Basic separation principle of the AIDOH, prototype structure, experimental technical process and facilities are introduced. The effect of different geometric parameters, including vortex finder diameter and length, micro-pore diameter, and different operating conditions, such as flowrate, split ratio, gas-liquid ratio, and air-injecting position, were studied. Laboratory experiments were carried out first to provide basis for field tests. The field research indicates that, for around 1000 mg/l polymer-flooding oily produced-water, the optimum flowrate is 4.20 m3/h for the testing prototype, the split ratio should be 30%; gas-liquid ratio 0.45. It also shows that 20–40 µm micro-pore materials are optimum diameter for hydrocyclonic separation enhancement Research indicates that the AIDOH has satisfied separation effect, which is feasible for emulsified oil treatment. The AIDOH will have better application prospect in petrochemical, environmental field, especially for offshore application, to reduce space occupied by normal water treatment facilities.

scholarly journals Computational Simulations of the 4-D Micro-Circulatory Network in Zebrafish Tail Amputation and Regeneration

2021 ◽  
Author(s):  
Mehrdad Roustaei ◽  
Kyung In Baek ◽  
Zhaoqiang Wang ◽  
Susana Cavallero ◽  
Sandro Satta ◽  
...  
Keyword(s):  
Flow Rate ◽  
Cfd Simulation ◽  
Fluorescent Protein ◽  
Cfd Modeling ◽  
Endothelial Lining ◽  
Zebrafish Model ◽  
Cardinal Vein ◽  
Vascular Regeneration ◽  
Computational Fluid Dynamics Cfd ◽  
Green Fluorescent

AbstractWall shear stress (WSS) in the micro-vasculature contributes to biomechanical cues that regulate mechanotransduction underlying vascular development, regeneration, and homeostasis. We hereby elucidate the interplay between hemodynamic shear forces and luminal remodeling in response to vascular injury and regeneration in the zebrafish model of tail amputation. Using the transgenic Tg(fli1:eGFP; Gata1:ds-red) line, we were able to track the enhanced green-fluorescent protein (eGFP)-labeled endothelial lining of the 3-D microvasculature for post-image segmentation and reconstruction of fluid domain for computational fluid dynamics (CFD) simulation. At 1 day post amputation (dpa), dorsal aorta (DA) and posterior cardinal vein (PCV) were severed, and vasoconstriction developed in the dorsal longitudinal anastomotic vessel (DLAV) with a concomitant increase in WSS in the segmental vessels (SV) proximal to the amputation site and a decrease in WSS in SVs distal to amputation. Simultaneously, we observed angiogenesis commencing at the tips of the amputated DLAV and PCV where WSS was minimal in the absence of blood flow. At 2 dpa, vasodilation occurred in a pair of SVs proximal to amputation, resulting in increased flow rate and WSS, whereas in the SVs distal to amputation, WSS normalized to the baseline. At 3 dpa, the flow rate in the arterial SV proximal to amputation continued to rise and merged with DLAV that formed a new loop with PCV. Thus, our CFD modeling uncovered a well-coordinated micro-vascular adaptation process following tail amputation, accompanied by the rise and fall of WSS and dynamic changes in flow rate during vascular regeneration.

Numerical Modeling and Optimization of a Natural Gas and Coke Oven Gas Mixing Flow Field

2016 ◽  
Author(s):  
Xiang Liu ◽  
Bin Wu ◽  
Guangwu Tang ◽  
Yuchao Chen ◽  
Armin K. Silaen ◽  
...  
Keyword(s):  
Blast Furnace ◽  
Natural Gas ◽  
Flow Rate ◽  
Cfd Simulation ◽  
Coke Oven ◽  
Thermal Control ◽  
Pipeline System ◽  
Coke Oven Gas ◽  
Computational Fluid Dynamics Cfd ◽  
Integrated Steel Plant

Coke oven gas (COG) is a by-product of the coke making process. In the steelmaking industry, COG is often injected along with natural gas as fuel into blast furnace to replace coke for cost reduction. For an integrated steel plant, NG is always more expensive than COG. Especially, NG is purchased externally, and COG is generated internally. To lower the total fuel cost, the operators always try to maximize COG usage and only use NG as supplement for thermal control. However, it is found that such simple concept could not be implemented successfully. Every time, as NG flow rate increases, the COG flow rate decreases automatically. As a result, total fuel supply is short than expected, and the blast furnace finally loses thermal stability. A comprehensive investigation was conducted. Computational fluid dynamics (CFD) was used to model the COG and NG pipeline system. It is identified that mixing of COG and NG has a critical impact. In the existing pipeline system, COG and NG is simply mixed at a joint where COG and NG meet. CFD simulation identified that the current mixing of COG and NG is not adequate, causing COG flow out of control as NG flow varies. A new design of COG and NG joint is developed by adding baffles to ensure the COG flow can be adjusted as needed.

Research on the Influence Factors of Cavitating Jet in Jet Pipe Amplifier Nozzle

2012 ◽  
Vol 229-231 ◽  
pp. 617-620
Author(s):  
Xin Hua Wang ◽  
Zhi Jie Li ◽  
Shu Wen Sun ◽  
Gang Zheng
Keyword(s):  
Fluid Dynamics ◽  
Structural Parameters ◽  
Influence Factors ◽  
Flow Characteristics ◽  
Operating Parameters ◽  
Cavitation Flow ◽  
Outlet Pressure ◽  
Computational Fluid Dynamics Cfd ◽  
Water Nozzle ◽  
Cavitating Jet

The cavitation flow characteristics in jet pipe amplifier with different nozzles were simulated using commercial computational fluid dynamics (CFD) software. The influence of operating parameters and structural parameters of jet nozzles on cavitation jets are the key objective. These parameters mainly include inlet pressure, outlet pressure, temperature of water, nozzle convergence angle, the length of the nozzle cylindrical section, nozzle diameter and nozzle export chamfer angle. The results provide methods to limit the emergence and development of the nozzle jet internal cavitations.

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