Numerical Simulation and Experimental Analysis of the Influence of Asymmetric Pressure Conditions on the Splitting of a Gas-Liquid Two-Phase Flow at a T-Junction

Ma, Lihui; He, Limin; Luo, Xiaoming; Mi, Xiangran

doi:10.32604/fdmp.2021.016710

Cited by 4 publications

(4 citation statements)

References 19 publications

(18 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The distribution of these flows can be uneven, influenced by factors such as the unpredictable nature of the two-phase flow at the T-junction's entrance and the unequal conditions in the pipelines downstream of the T-junction. The so-called uneven distribution phenomenon has two meanings: one is in which the GLTPF passes through the T-junction, the GLTPF has a different gas-liquid ratio in the downstream parallel pipelines, and the other is an uneven flow distribution in the downstream parallel pipelines [6,7].…”

Section: Introductionmentioning

confidence: 99%

An Experimental Analysis of Gas-Liquid Flow Breakdown in a T-Junction

Ma,

Han,

et al. 2024

FDMP

View full text Add to dashboard Cite

When a gas-liquid two-phase flow (GLTPF) enters a parallel separator through a T-junction, it generally splits unevenly. This phenomenon can seriously affect the operation efficiency and safety of the equipment located downstream. In order to investigate these aspects and, more specifically, the so-called bias phenomenon (all gas and liquid flowing to one pipe, while the other pipe is a liquid column that fluctuates up and down), laboratory experiments were carried out by using a T-junction connected to two parallel vertical pipes. Moreover, a GLTPF prediction model based on the principle of minimum potential energy was introduced. The research results indicate that this model can accurately predict the GLTPF state in parallel risers. The boundary of the slug flow and the churn flow in the opposite pipe can be predicted. Overall, according to the results, the pressure drop curves of the two-phase flow in the parallel risers are basically the same when there is no bias phenomenon, but the pressure drop in the parallel riser displays a large deviation when there is a slug flow-churn flow. Only when the parallel riser is in a state of asymmetric flow and one of the risers produces churn flow, the two-phase flow is prone to produce the bias phenomenon.

show abstract

Section: Introductionmentioning

confidence: 99%

An Experimental Analysis of Gas-Liquid Flow Breakdown in a T-Junction

Ma,

Han,

et al. 2024

FDMP

View full text Add to dashboard Cite

show abstract

“…For the impact T-junction with two outlet arms connecting the riser, Liu et al [6] showed that the inlet and outlet pressures had a great influence on the gas-liquid two-phase mass flow rate. Ma et al [7] numerically simulated the gas-liquid two-phase flow distribution in a branch pipeline, demonstrating that, at the same outlet pressure, the gas-liquid two-phase flow was always in a uniform distribution state. Ma et al [8,9] explored the asymmetry of the downstream pipeline with the aim to obtain the equal gasliquid ratio separation of the gas-liquid two-phase flow.…”

Section: Introductionmentioning

confidence: 99%

Experimental Investigation of Regular or Wavy Two-Phase Flow in a Manifold

Nie¹,

Ma²,

Xu³

et al. 2023

Fluid Dynamics &Amp; Materials Processing

Self Cite

View full text Add to dashboard Cite

An experimental study was conducted to investigate the properties of stratified regular or wavy two-phase flow in two parallel separators located after a manifold. A total of 103 experiments with various gas and liquid velocity combinations in three inlet pipes were conducted, including 77 groups of outlet pipe resistance symmetry and 26 groups of outlet pipe resistance asymmetry trials. The experimental results have revealed that when the gas-liquid flow rate is low, the degree of uneven splitting is high, and "extreme" conditions are attained. When the superficial gas velocity is greater than that established in the extreme case, the direction of the liquid-phase displacement is reversed, while that of the gas remains unchanged. Thus, the degree of gas phase bias tends to be mitigated with an increase in the gas velocity, while the uneven splitting degree of liquid approaches 10%. Finally, varying the gas-phase outlet pipe resistance is shown to effectively change the gas-liquid two-phase flow distribution.

show abstract

“…Reliable reservoir models can accurately reproduce the complete reservoir developing process and provide convincing guidance for production management decision-making [1][2][3][4][5]. History matching that can correct reservoir model parameters based on geological information and production data is a critical step in reservoir numerical simulation process.…”

Section: Introductionmentioning

confidence: 99%

An Improved Parameter Dimensionality Reduction Approach Based on a Fast Marching Method for Automatic History Matching

Zhang¹,

Gao²,

Li³

et al. 2022

Fluid Dynamics &Amp; Materials Processing

View full text Add to dashboard Cite

History matching is a critical step in reservoir numerical simulation algorithms. It is typically hindered by difficulties associated with the high-dimensionality of the problem and the gradient calculation approach. Here, a multi-step solving method is proposed by which, first, a Fast marching method (FMM) is used to calculate the pressure propagation time and determine the single-well sensitive area. Second, a mathematical model for history matching is implemented using a Bayesian framework. Third, an effective decomposition strategy is adopted for parameter dimensionality reduction. Finally, a localization matrix is constructed based on the single-well sensitive area data to modify the gradient of the objective function. This method has been verified through a water drive conceptual example and a real field case. The results have shown that the proposed method can generate more accurate gradient information and predictions compared to the traditional analytical gradient methods and other gradient-free algorithms.

show abstract

Numerical Simulation and Experimental Analysis of the Influence of Asymmetric Pressure Conditions on the Splitting of a Gas-Liquid Two-Phase Flow at a T-Junction

Cited by 4 publications

References 19 publications

An Experimental Analysis of Gas-Liquid Flow Breakdown in a T-Junction

An Experimental Analysis of Gas-Liquid Flow Breakdown in a T-Junction

Experimental Investigation of Regular or Wavy Two-Phase Flow in a Manifold

An Improved Parameter Dimensionality Reduction Approach Based on a Fast Marching Method for Automatic History Matching

Contact Info

Product

Resources

About