Experimental and Numerical Method for Estimating Diffusion Coefficient of the Carbon Dioxide into Light Components

Bagalkot, Nikhil; Hamouda, Aly A.

doi:10.1021/acs.iecr.6b04318

Cited by 33 publications

(35 citation statements)

References 25 publications

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“…Basically, Finite Element is a dominant discretization method in structural mechanics in which a complex model is separated (subdivided) into disjoints components of small geometries. Moreover, Finite Element Methods can capture much of the complexity of the process, and whereby the differential equations governing the process can be determined by using these methods [39,40]. Therefore, FEMs attract enormous research interests over the past two decades.…”

Section: Thermal Analysis Of Fsw (Friction Stir Welding)mentioning

confidence: 99%

A Comparison of Different Finite Element Methods in the Thermal Analysis of Friction Stir Welding (FSW)

Meyghani

Awang

Emamian

et al. 2017

Metals

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Friction Stir Welding (FSW) is a novel kind of welding for joining metals that are impossible or difficult to weld by conventional methods. Three-dimensional nature of FSW makes the experimental investigation more complex. Moreover, experimental observations are often costly and time consuming, and usually there is an inaccuracy in measuring the data during experimental tests. Thus, Finite Element Methods (FEMs) has been employed to overcome the complexity, to increase the accuracy and also to reduce costs. It should be noted that, due to the presence of large deformations of the material during FSW, strong distortions of mesh might be happened in the numerical simulation. Therefore, one of the most significant considerations during the process simulation is the selection of the best numerical approach. It must be mentioned that; the numerical approach selection determines the relationship between the finite grid (mesh) and deforming continuum of computing zones. Also, numerical approach determines the ability of the model to overcome large distortions of mesh and provides an accurate resolution of boundaries and interfaces. There are different descriptions for the algorithms of continuum mechanics include Lagrangian and Eulerian. Moreover, by combining the above-mentioned methods, an Arbitrary Lagrangian-Eulerian (ALE) approach is proposed. In this paper, a comparison between different numerical approaches for thermal analysis of FSW at both local and global scales is reviewed and the applications of each method in the FSW process is discussed in detail. Observations showed that, Lagrangian method is usually used for modelling thermal behavior in the whole structure area, while Eulerian approach is seldom employed for modelling of the thermal behavior, and it is usually employed for modelling the material flow. Additionally, for modelling of the heat affected zone, ALE approach is found to be as an appropriate approach. Finally, several significant challenges and subjects remain to be addressed about FSW thermal analysis and opportunities for the future work are proposed.

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Section: Thermal Analysis Of Fsw (Friction Stir Welding)mentioning

confidence: 99%

A Comparison of Different Finite Element Methods in the Thermal Analysis of Friction Stir Welding (FSW)

Meyghani

Awang

Emamian

et al. 2017

Metals

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“…As the displacing fluid contacts the model oil, CO2/C1/C3 condensates into the oil phase (Figure 6a). Condensation of CO2 from the injection fluid was more pronounced not only because of its high content in the injection gas but also because of its diffusion and solubility into n-C10 [11,12]. As the injection continued, the C1 and C3 contents increased in the oil phase while the C10 content (mole %) was reduced.…”

Section: Effect Of Light Components (C1andc3) In the Displacing Fluid Omentioning

confidence: 99%

Miscible CO2 Flooding for EOR in the Presence of Natural Gas Components in Displacing and Displaced Fluids

Hamouda

Chughtai

2018

Energies

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Carbon dioxide (CO 2) flooding is a complicated process as it involves phase behavior. The objective of this work was to understand the mass transfer mechanisms during flooding with CO 2 and CO 2 /C1/C3 (CO 2 /HC) based on experimental and simulated composition changes. Three model oil compositions were used (n-C10, n-C10/C1, and n-C10/C1/C3). For a comparison, crude oil from a North Sea field was included. The second part of the investigation was to compare the effect of the combined light components (C1/C3) with CO 2 as a displacing fluid on enhanced oil recovery (EOR). Equation of State EOS SRK-Peneloux was used for the simulations to predict composition changes. The highest recovery was obtained from model oil (n-C10) displaced with CO 2 compared to model oil containing light components with the highest recovery recorded from model oil/C1 (live oil A) compared to model oil/C1/C3 at all of the tested temperatures. The presence of light components (C1/C3) in the injected CO 2 at miscible conditions increased the oil recovery for crude oil compared to flooding only with CO 2. Transverse dispersion of CO 2 helps in eliminating/reducing the effect of viscous instabilities by shortening fingering travel/widening the fingers. The collected samples contained water, although the flooding was done on dry sandstone cores. Possible mechanisms are discussed in a later section.

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“…The experimental setup was designed in a way that it replicates the physics occurring during the CWI (secondary). The detailed experimental procedure may be found in Bagalkot and Hamouda [9].…”

Section: B Experimental Setup and Proceduresmentioning

confidence: 99%

Experimental Investigation of Temperature on Interfacial Tension and its Relation to Alterations of Hydrocarbon Properties in a Carbonated Water/ Hydrocarbon System

Hamouda¹,

Bagalkot²

2018

IJCEA

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The study addresses interfacial tension (IFT), and mass transfer in carbonated water (CW)/hydrocarbon systems, using the axisymmetric drop shape analysis (ADSA). Experiments and a mathematical model was used for CW+n-decane system of non-isobaric (10-70 bar) and non-isothermal conditions (25 o C, 35 o C, and 45 o C) using the axisymmetric drop shape analysis (ADSA). Further, the study addresses the inconsistencies of the reported in results reported in the literature between temperature and IFT. The experimental results (volume changes) and analytical equations have been used to develop a compositional model to estimate the mass of CO 2 diffused into hydrocarbon and the density of n-decane+ CO 2 as a function of time, pressure, and temperature. The obtained densities are then used to estimate real-time and the equilibrium IFT from the pendant drop experiments. The results indicated that for CW-n-decane system equilibrium IFT increases as pressure increases (10-60 bar), depicting an opposite trend to that observed for the CO 2-n-decane system. This was shown to be related to the density difference between the hydrocarbon and the carbonated water, and CO 2 solubility. Further, it was observed that the IFT was inversely related to temperature, which was credited to the changes in the kinetic energy and entropy. Among the three chosen temperatures, it was observed that the IFT at 35 o C did not display the same behaviour as that at 25 o C and 45 o C with pressure and temperature. Up to a certain pressure the IFT at 35 o C was lower than at 45 o C, and beyond this pressure, the IFT at 35 o C was greater than at 45 o C. The present article takes a step in resolving the controversy of IFT vs temperature and building the knowledge by carrying out a non-isothermal and non-isobaric study on the influence of temperature on the IFT in a system containing carbonated water and hydrocarbon. Further, the study gives an insight into the feasibility of carbonated water injection as a successful recovery process.

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Experimental and Numerical Method for Estimating Diffusion Coefficient of the Carbon Dioxide into Light Components

Cited by 33 publications

References 25 publications

A Comparison of Different Finite Element Methods in the Thermal Analysis of Friction Stir Welding (FSW)

A Comparison of Different Finite Element Methods in the Thermal Analysis of Friction Stir Welding (FSW)

Miscible CO2 Flooding for EOR in the Presence of Natural Gas Components in Displacing and Displaced Fluids

Experimental Investigation of Temperature on Interfacial Tension and its Relation to Alterations of Hydrocarbon Properties in a Carbonated Water/ Hydrocarbon System

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