A consistent correction for Redlich-Kwong-Soave volumes

Peneloux, André; Rauzy, Evelyne; Fréze, Richard

doi:10.1016/0378-3812(82)80002-2

Cited by 1,199 publications

(586 citation statements)

References 9 publications

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“…The thermodynamic and chemical properties include density, viscosity, interfacial tension, heat transfer coefficient, and the fugacity, solubility, diffusivity and mass transfer coefficient of each component of the chemical mixture. The density and fugacity are computed using the Peng-Robinson equation of state with volume translation [37][38][39]. The solubility is predicted by the modified Henry's law equation, in which the partial pressure in Henry's law is replaced by the fugacity, and the Henry's law constant is adjusted from standard conditions to in situ temperature, pressure, and salinity [2,40,41].…”

Section: Discrete Particle Model: Particle-scale Dynamics Modelmentioning

confidence: 99%

Integral models for bubble, droplet, and multiphase plume dynamics in stratification and crossflow

2018

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We present the development and validation of a numerical modeling suite for bubble and droplet dynamics of multiphase plumes in the environment. This modeling suite includes real-fluid equations of state, Lagrangian particle tracking, and two different integral plume models: an Eulerian model for a double-plume integral model in quiescent stratification and a Lagrangian integral model for multiphase plumes in stratified crossflows. Here, we report a particle tracking algorithm for dispersed-phase particles within the Lagrangian integral plume model and a comprehensive validation of the Lagrangian plume model for single-and multiphase buoyant jets. The model utilizes literature values for all entrainment and spreading coefficients and has one remaining calibration parameter j, which reduces the buoyant force of dispersed phase particles as they approach the edge of a Lagrangian plume element, eventually separating from the plume as it bends over in a crossflow. We report the calibrated form j ¼ ½ðb À rÞ=b 4 , where b is the plume halfwidth, and r is the distance of a particle from the plume centerline. We apply the validated modeling suite to simulate two test cases of a subsea oil well blowout in a stratificationdominated crossflow. These tests confirm that errors from overlapping plume elements in the Lagrangian integral model during intrusion formation for a weak crossflow are negligible for predicting intrusion depth and the fate of oil droplets in the plume. The Lagrangian integral model has the added advantages of being able to account for entrainment from an arbitrary crossflow, predict the intrusion of small gas bubbles and oil droplets when appropriate, and track the pathways of individual bubbles and droplets after they separate from the main plume or intrusion layer.

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Section: Discrete Particle Model: Particle-scale Dynamics Modelmentioning

confidence: 99%

Integral models for bubble, droplet, and multiphase plume dynamics in stratification and crossflow

2018

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“…In this way, this equation of state strikes a great balance between simplicity and accuracy when performing a real fluid computational simulation [35]. Likewise, the Soave Redlich Kwong state equation is considered to possess reasonable accuracy, especially near and above the critical point, thus ensuring the validity of SCO 2 simulation [36,37].…”

Section: Governing Equationsmentioning

confidence: 99%

Investigation on Unsteady Flow Characteristics of a SCO2 Centrifugal Compressor

et al. 2017

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Supercritical carbon dioxide (SCO 2 ) is a vital working fluid in the application of power units and its high density helps to achieve a compact mechanical structure. Centrifugal compressors are of vital use in various kinds of equipment. In this paper, a SCO 2 centrifugal compressor of large input power and mass flow rate is designed and numerically investigated. A thorough numerical analysis of the unsteady flow field in the centrifugal compressor is performed in ANSYS-CFX. The computation adopts hexahedral mesh, finite volume method, and the RNG k-ε two-equation turbulence model. Streamlines, temperature, pressure, and Mach number distributions at different time steps in one revolution period are covered to present the unsteady effect of turbomachinery. Meanwhile, the force on a single rotor blade is monitored to investigate the frequency components of exciting force, thus providing the foundation for vibration analysis. Moreover, the torque, output power, pressure ratio, and isentropic efficiency in the steady and the unsteady time-averaged condition are calculated and compared with the design condition to measure the validity of the design. In summary, the unsteady computation result reveals that the unsteady flow characteristics are prominent in the designed compressor and the design of impeller and diffuser meet the requirement.

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“…The three sets of small opposing sapphire windows allow observation of the positions of the ball as a function of time without exposing any electronic equipment to the high temperature (this is the fundamental reason that other types of viscometers are limited to lower temperature ranges). This HTHP rolling ball viscometer will be used to measure the viscosity of hydrocarbon fluids ranging from methane to C 40 . The viscometer has been calibrated with n-octane and dioctyl phthalate (DOP) at tilt angles ranging from of 7o to 40o using a ball with a ball diameter: tube diameter (d/D) ratio of 0.995.…”

Section: Viscosity Cellmentioning

confidence: 99%

An Assessment of Research Needs Related to Improving Primary Cement Isolation of Formations in Deep Offshore Wells

Tapriyal¹,

Enick²,

McHugh³

et al. 2012

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The National Energy Technology Laboratory (NETL) conducts cutting-edge energy research and technology development and analyzes energy systems and international energy issues for the U.S. Department of Energy. The NETL-Regional University Alliance (NETL-RUA) is an applied research collaboration that combines NETL's energy research expertise with the broad capabilities of five nationally recognized, regional universities: Carnegie Mellon University (CMU), The Pennsylvania State University (PSU), the University of Pittsburgh (Pitt), Virginia Tech, and West Virginia University (WVU), and the engineering and construction expertise of an industry partner (URS). The NETL-RUA leverages its expertise with current fossil energy sources to discover and develop sustainable energy systems of the future, introduce new technology, and boost economic development and national security. Cover Illustration:The image provides an inside view of the density cell, which is capable of getting density data at 500°F and 35,000 psi. The left side image shows the bubble point of the gas. The tiny bubbles can be seen at the top center of the cell. The middle image shows the liquid-liquid-gas equilibrium phase exhibiting two liquid phases at the bottom and in the middle sections as well as a gas phase at the top. The right side image shows the solid formation as the pressure is increased.

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A consistent correction for Redlich-Kwong-Soave volumes

Cited by 1,199 publications

References 9 publications

Integral models for bubble, droplet, and multiphase plume dynamics in stratification and crossflow

Integral models for bubble, droplet, and multiphase plume dynamics in stratification and crossflow

Investigation on Unsteady Flow Characteristics of a SCO2 Centrifugal Compressor

An Assessment of Research Needs Related to Improving Primary Cement Isolation of Formations in Deep Offshore Wells

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