Influence of phase percentage, pre-deformation microstructure and particle characteristics on rheology of two-phase materials: Insights from experiments using ice mixtures combined with numerical modelling

Secondary pollution by microorganisms and substances peeling off from the “growth ring” causes clean water deterioration during the water distribution process. In order to reduce the secondary pollution, our previous research investigated the best settings of a two-phase flow flushing method for pipeline cleaning in water distribution systems experimentally, and a case study was carried out for comparison of the efficiencies between two-phase and single-phase flow methods. In this paper, based on the results of the experimental study, numerical modelling and a simulation study are carried out by FLUENT to evaluate the performance of the two-phase flow flushing method for removal of the “growth ring”. Results: the simulation results match the experimental results; pressure, water-phase flow velocity and water-phase volume ratio distributions in a section of pipe are simulated and analysed; the shear force against time in a period is obtained; elbow pipes cause flushing energy loss, and therefore, at most one section of elbow pipe is flushed in one flushing period.

Download Full-text

95/06186 Numerical modelling of the evolution of two-phase zones under a fractured caprock

Fuel and Energy Abstracts ◽

10.1016/0140-6701(95)97795-l ◽

1995 ◽

Vol 36 (6) ◽

pp. 438

Keyword(s):

Numerical Modelling ◽

Two Phase

Download Full-text

Application of Numerical Modelling and Genetic Programming in Hydrocarbon Seepage Prediction and Control for Crude Oil Storage Unlined Rock Caverns

Geofluids ◽

10.1155/2017/6803294 ◽

2017 ◽

Vol 2017 ◽

pp. 1-11 ◽

Cited By ~ 1

Author(s):

Ebrahim Ghotbi Ravandi ◽

Reza Rahmannejad ◽

Saeed Karimi-Nasab ◽

Amir Sarrafi

Keyword(s):

Genetic Programming ◽

Numerical Modelling ◽

Crude Oil ◽

Control Method ◽

Effective Parameters ◽

Two Phase ◽

Seepage Control ◽

Oil Storage ◽

Prediction And Control ◽

And Control

Seepage control is a prerequisite for hydrocarbon storage in unlined rock caverns (URCs) where the seepage of stored products to the surrounding host rock and groundwater can cause serious environmental and financial problems. Practically seepage control is performed by permeability and hydrodynamic control methods. This paper employs numerical modelling and genetic programming (GP) for the purpose of seepage prediction and control method determination for the crude oil storage URCs based on the effective parameters including hydrogeologic characteristic of the rock and physicochemical properties of the hydrocarbons. Several levels for each parameter were considered and all the possible scenarios were modelled numerically for the two-phase mixture model formulation. The corresponding seepage values were evaluated to be used as genetic programming data base to generate representative equations for the hydrocarbon seepage value. The coefficients of determination (R2) and relative percent errors of the proposed equations show their ability in the seepage prediction and permeability or hydrodynamic control method determination and design. The results can be used for crude oil storage URCs worldwide.

Download Full-text

A simple dynamic approach for the numerical modelling of soil as a two-phase material

geotechnik ◽

10.1002/gete.201200018 ◽

2013 ◽

Vol 36 (3) ◽

pp. 180-191 ◽

Cited By ~ 9

Author(s):

Thorben Hamann ◽

Jürgen Grabe

Keyword(s):

Numerical Modelling ◽

Dynamic Approach ◽

Two Phase

Download Full-text

Research on Particle Characteristics of Cellulosine Used in Generation Basing on Two-Phase Flow of the Gas and Solid

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.431-432.483 ◽

2010 ◽

Vol 431-432 ◽

pp. 483-486

Author(s):

Lan Yu Yang ◽

Yan Ma

Keyword(s):

Power Generation ◽

Particle Size ◽

Two Phase Flow ◽

Influence Factors ◽

Particle Diameter ◽

Phase Flow ◽

Two Phase ◽

Particle Characteristics ◽

Biomass Resources ◽

Grading Model

The amount of remainder in wooden biomass resources available which was used for power generation in China was surveyed. Technique feasibility of the wooden remainder used in power generation was analyzed. A super fine cellulosine disintegrator for power generation was designed, which combined both characteristics of the wooden biomass and particle size of the cellulosine for power generation. The cellulosine particles which were obtained were put emphasis on analyzing and all kinds of stressed conditions were obtained during process of the grading under the environment for two-phase flow of the gas and solid. One kind of grading model of the cellulosine particles for power generation was established in view of all kinds of the influence factors comprehensively. One kind of calculation method for grading particle-diameter of the cellulosine particle, and the experiment results showed that this method was feasible.

Download Full-text