Numerical Simulation of Oil-Water Core Annular Flow in a U-Bend Based on the Eulerian Model

2014 ◽  
Vol 37 (4) ◽  
pp. 659-666 ◽  
Author(s):  
Fan Jiang ◽  
Yijun Wang ◽  
Jiajie Ou ◽  
Conggui Chen
Keyword(s):  
Numerical Simulation ◽  
Annular Flow ◽  
Eulerian Model ◽  
Oil Water

Numerical Simulation on Oil–Water Annular Flow through the Π Bend

2014 ◽  
Vol 53 (19) ◽  
pp. 8235-8244 ◽  
Author(s):  
Fan Jiang ◽  
Yijun Wang ◽  
Jiajie Ou ◽  
Zhongmin Xiao
Keyword(s):  
Numerical Simulation ◽  
Annular Flow ◽  
Flow Through ◽  
Oil Water

Numerical simulation of hydrate slurry flow behavior in oil-water systems based on hydrate agglomeration modelling

2018 ◽  
Vol 169 ◽  
pp. 393-404 ◽  
Author(s):  
GuangChun Song ◽  
YuXing Li ◽  
WuChang Wang ◽  
Kai Jiang ◽  
Zhengzhuo Shi ◽  
...  
Keyword(s):  
Numerical Simulation ◽  
Flow Behavior ◽  
Water Systems ◽  
Slurry Flow ◽  
Oil Water

scholarly journals ASHEE-1.0: a compressible, equilibrium–Eulerian model for volcanic ash plumes

2016 ◽  
Vol 9 (2) ◽  
pp. 697-730 ◽  
Author(s):  
M. Cerminara ◽  
T. Esposti Ongaro ◽  
L. C. Berselli
Keyword(s):  
Numerical Simulation ◽  
Large Scale ◽  
Volume Fraction ◽  
Radial Profile ◽  
Air Entrainment ◽  
Compressible Turbulence ◽  
Eulerian Model ◽  
Volcanic Plumes ◽  
Large Eddy ◽  
Non Equilibrium

Abstract. A new fluid-dynamic model is developed to numerically simulate the non-equilibrium dynamics of polydisperse gas–particle mixtures forming volcanic plumes. Starting from the three-dimensional N-phase Eulerian transport equations for a mixture of gases and solid dispersed particles, we adopt an asymptotic expansion strategy to derive a compressible version of the first-order non-equilibrium model, valid for low-concentration regimes (particle volume fraction less than 10−3) and particle Stokes number (St – i.e., the ratio between relaxation time and flow characteristic time) not exceeding about 0.2. The new model, which is called ASHEE (ASH Equilibrium Eulerian), is significantly faster than the N-phase Eulerian model while retaining the capability to describe gas–particle non-equilibrium effects. Direct Numerical Simulation accurately reproduces the dynamics of isotropic, compressible turbulence in subsonic regimes. For gas–particle mixtures, it describes the main features of density fluctuations and the preferential concentration and clustering of particles by turbulence, thus verifying the model reliability and suitability for the numerical simulation of high-Reynolds number and high-temperature regimes in the presence of a dispersed phase. On the other hand, Large-Eddy Numerical Simulations of forced plumes are able to reproduce the averaged and instantaneous flow properties. In particular, the self-similar Gaussian radial profile and the development of large-scale coherent structures are reproduced, including the rate of turbulent mixing and entrainment of atmospheric air. Application to the Large-Eddy Simulation of the injection of the eruptive mixture in a stratified atmosphere describes some of the important features of turbulent volcanic plumes, including air entrainment, buoyancy reversal and maximum plume height. For very fine particles (St → 0, when non-equilibrium effects are negligible) the model reduces to the so-called dusty-gas model. However, coarse particles partially decouple from the gas phase within eddies (thus modifying the turbulent structure) and preferentially concentrate at the eddy periphery, eventually being lost from the plume margins due to the concurrent effect of gravity. By these mechanisms, gas–particle non-equilibrium processes are able to influence the large-scale behavior of volcanic plumes.

Numerical Simulation of Multi-Phase Flow Distribution in Parallel Pipelines System of Oil Transfer Station

2019 ◽  
Author(s):  
Yingying Wang ◽  
Chunsheng Wang ◽  
Qiji Sun ◽  
Yuling Lv
Keyword(s):  
Numerical Simulation ◽  
Branch Pipe ◽  
Flow Distribution ◽  
Simulation Models ◽  
Phase Flow ◽  
Gas Oil ◽  
Inlet Flow ◽  
Multi Phase Flow ◽  
Oil Water ◽  
Multi Phase

Abstract The mal-distribution of gas-oil-water multi-phase flow in parallel petroleum processing pipelines can directly affect the working condition of the separators. In this paper, the influence of different factors on the flow distribution and the characteristics of gas-oil-water distribution in parallel pipelines was investigated by three-dimensional CFD numerical simulation. Firstly, four different simulation models are established based on different arrangement types of parallel pipelines. The simulation results show that the distribution of gas-oil-water flow in the radial entry symmetrical two-stage pipe-laying simulation model was the most uniform among the four simulation models. Then, four radial entry symmetrical two-stage pipe-laying simulation models with different distance between branch pipes were establish. From the simulated results, it can be found that the distance has no effect on the distribution of gas-oil-water flow in each branch pipe, but great influence on distribution of flow rate in each branch pipe. Finally, the influence of the inlet flow characters on the flow distribution is investigated. It can be found that the “bias flow” phenomenon of the parallel pipelines decreasing with the increase of the inlet flow velocity, the gas content of inlet flow and the water content of inlet liquid.

Experimental study on highly viscous oil-water annular flow in a horizontal pipe with 90° elbow

2021 ◽  
Vol 135 ◽  
pp. 103499
Author(s):  
Jiaqiang Jing ◽  
Xiaoyun Yin ◽  
Boris N. Mastobaev ◽  
Anvar R. Valeev ◽  
Jie Sun ◽  
...  
Keyword(s):  
Experimental Study ◽  
Annular Flow ◽  
Horizontal Pipe ◽  
Viscous Oil ◽  
Oil Water ◽  
Highly Viscous Oil

scholarly journals The Effects of Oil Property and Inclination Angle on Oil–Water Core Annular Flow Through U-Bends

2017 ◽  
Vol 39 (6) ◽  
pp. 536-548
Author(s):  
Fan Jiang ◽  
Ke Wang ◽  
Martin Skote ◽  
Teck Neng Wong ◽  
Fei Duan
Keyword(s):  
Inclination Angle ◽  
Annular Flow ◽  
Flow Through ◽  
Oil Water
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