Multiphase Flow

14,000,000 Leading Edge Experts on the ideXlab platform

Scan Science and Technology

Contact Leading Edge Experts & Companies

Scan Science and Technology

Contact Leading Edge Experts & Companies

The Experts below are selected from a list of 41004 Experts worldwide ranked by ideXlab platform

Ping Cheng - One of the best experts on this subject based on the ideXlab platform.

  • Multiphase Flow and heat transfer in porous media
    Advances in heat transfer, 1997
    Co-Authors: Chaoyang Wang, Ping Cheng
    Abstract:

    Publisher Summary This chapter outlines several theoretical models currently prevailing for Multiphase Flow and heat transfer in porous media. In particular, a Multiphase mixture model is elaborated and compared with the traditional Multiphase Flow model and unsaturated Flow theory. This model is rigorously derived from the traditional Multiphase Flow model (MFM) without making further approximations. The new model views the multiple phases as constituents of a mixture, and thus consists only of the conservation equations for the whole Multiphase mixture. All primary variables in this model are mixture properties; therefore, complex tasks to track phase interfaces separating various subregions and handle phase appearance or disappearance are avoided. The chapter discusses fundamental systems rather than specific applications. To establish a fundamental theoretical framework, basic concepts associated with Multiphase transport in porous media are discussed. The chapter reviews both theoretical and experimental work for single component two-phase systems with major applications to thermal engineering, while general Multiphase, multicomponent systems in connection with a wide variety of engineering applications, such as drying of porous materials, groundwater contamination, and remediation. The chapter concludes that the studies of heat transfer in multicomponent porous media systems are only at the initial stage, and very extensive research is needed in this technologically important and fundamentally intricate subfield of heat transfer.

Chaoyang Wang - One of the best experts on this subject based on the ideXlab platform.

  • Multiphase Flow and heat transfer in porous media
    Advances in heat transfer, 1997
    Co-Authors: Chaoyang Wang, Ping Cheng
    Abstract:

    Publisher Summary This chapter outlines several theoretical models currently prevailing for Multiphase Flow and heat transfer in porous media. In particular, a Multiphase mixture model is elaborated and compared with the traditional Multiphase Flow model and unsaturated Flow theory. This model is rigorously derived from the traditional Multiphase Flow model (MFM) without making further approximations. The new model views the multiple phases as constituents of a mixture, and thus consists only of the conservation equations for the whole Multiphase mixture. All primary variables in this model are mixture properties; therefore, complex tasks to track phase interfaces separating various subregions and handle phase appearance or disappearance are avoided. The chapter discusses fundamental systems rather than specific applications. To establish a fundamental theoretical framework, basic concepts associated with Multiphase transport in porous media are discussed. The chapter reviews both theoretical and experimental work for single component two-phase systems with major applications to thermal engineering, while general Multiphase, multicomponent systems in connection with a wide variety of engineering applications, such as drying of porous materials, groundwater contamination, and remediation. The chapter concludes that the studies of heat transfer in multicomponent porous media systems are only at the initial stage, and very extensive research is needed in this technologically important and fundamentally intricate subfield of heat transfer.

Salam Al-rbeawi - One of the best experts on this subject based on the ideXlab platform.

  • Pseudo-steady state inFlow performance relationship of reservoirs undergoing Multiphase Flow and different wellbore conditions
    Journal of Natural Gas Science and Engineering, 2019
    Co-Authors: Salam Al-rbeawi
    Abstract:

    Abstract This paper introduces an integrated approach for the inFlow performance relationship of reservoirs that undergo Multiphase Flow conditions and drained by vertical wells with different wellbore conditions. The main objective is eliminating uncertainties that govern predicting reservoir performance by assuming single phase Flow in the porous media. The proposed approach includes developing several models for Multiphase Flow conditions using PVT data and relative permeability curves. These models are assembled with the inFlow performance relationship to substantially approaching the realistic reservoir pressure/Flow rate trend with time. Three tasks are conducted in this study. The first is developing three models for the three reservoir fluid compressibility functions [ f ( C o ) ] , [ f ( C g ) ] , and [ f ( w ) ] that consider the changes in comperssibilities with reservoir pressure. These functions are dependent on reservoir fluids properties that are in turn functions of reservoir pressure. While the second involves developing five models of reservoir fluid mobilities using relative permeability curves and the three functions of reservoir fluid comperssibilities. In this task the change in reservoir fluid saturations and the three saturations are calculated and used to calculate relative permeabilities at different reservoir pressures. Multiphase Flow reservoir pressure function [ f ( P ) m p ] is estimated in third task and used to predict the inFlow performance relationships for different wellbore inner boundary conditions i.e. constant Sandface Flow rate and constant wellbore pressure. The models in the three tasks are obtained by multi-regression analysis of PVT data and relative permeability curves. The outcomes of this study are: 1) Developing models for reservoir fluid motilities and comperssibilities using PVT data and relative permeabilities curves by multi-regression analysis. 2) Considering the impact of Multiphase Flow in the porous media by generating Multiphase Flow pressure function [ f ( P ) m p ] . 3) Predicting inFlow performance relationships for Multiphase Flow for different wellbore inner boundary conditions. The study has pointed out: 1) Productivity index of Multiphase Flow is less than the index for single phase Flow. 2) There are no significant differences in the inFlow performance relationships of single and Multiphase Flow for the two inner wellbore boundary conditions, however, constant Sandface Flow rate may have better inFlow performance relationship than constant wellbore pressure. 3) Most of the models generated by multi-regression analysis exhibits high accuracy (high R-squared value). 4) The proposed models may not have similar trendlines for different reservoirs.

Xun Zhu - One of the best experts on this subject based on the ideXlab platform.

  • An overview of smoothed particle hydrodynamics for simulating Multiphase Flow
    Applied Mathematical Modelling, 2016
    Co-Authors: Zhibin Wang, Rong Chen, Hong Wang, Qiang Liao, Xun Zhu
    Abstract:

    Abstract Smoothed particle hydrodynamics (SPH), is a meshfree, Lagrangian, particle method, which is advantageous over conventional grid-based numerical methods in the aspect of interface treatment. Therefore, it has shown promising potential for simulating the Multiphase Flow problems. Over the past decades, numerous efforts have been devoted to the simulation of the Multiphase Flow by using the SPH method. In this review, recent advances in SPH for simulating the Multiphase Flow are reviewed. Firstly, the basic concept of SPH is briefly introduced. Attention is then paid to how to treat the pressure of incompressible Flow, boundary condition and the surface tension in SPH. In addition, modeling free surface Flow is briefly introduced. The modified interfacial models and their applications in handling high density ratio are addressed. Finally, a summary of SPH in the application of the Multiphase Flow is given.

Xiaopei Liu - One of the best experts on this subject based on the ideXlab platform.

  • Kinetic-based Multiphase Flow Simulation
    IEEE Transactions on Visualization and Computer Graphics, 1
    Co-Authors: Daoming Liu, Mathieu Desbrun, Jin Huang, Xiaopei Liu
    Abstract:

    Multiphase Flows exhibit a large realm of complex behaviors such as bubbling, glugging, wetting, and splashing which emerge from air-water and water-solid interactions. Current fluid solvers in graphics have demonstrated remarkable success in reproducing each of these visual effects, but none have offered a model general enough to capture all of them concurrently. In contrast, computational fluid dynamics have developed very general approaches to Multiphase Flows, typically based on kinetic models. Yet, in both communities, there is dearth of methods that can simulate density ratios and Reynolds numbers required for the type of challenging real-life simulations that movie productions strive to digitally create, such as air-water Flows. In this paper, we propose a kinetic model of the coupling of the Navier-Stokes equations with a conservative phase-field equation, and provide a series of numerical improvements over an existing kinetic-based solver to offer a general Multiphase Flow solver. The resulting algorithm is embarrassingly parallel, conservative, far more stable than current solvers even for real-life conditions, and general enough to capture the typical Multiphase Flow behaviors. Various simulation results are presented, including comparisons to both previous work and real footage, to highlight the advantages of our new method.