PROPATH: A Function Type Computer Program Package for Thermophysical Properties of Fluids.

プロパス・グループ,; 猛宏, 伊藤

doi:10.2963/jjtp.5.124

Cited by 15 publications

(12 citation statements)

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“…(3), µ ‡ and r ‡ are the electric dipole moment and radius of the transition state, k 0 is the reaction rate constant for the case of no dipole moment change, and ε is the relative permittivity calculated from refs. [13,14]. In this paper, since temperature in Eq.…”

Section: Resultsmentioning

confidence: 99%

Temperature dependence of local density augmentation around exciplex in supercritical carbon dioxide

Aizawa

Kanakubo

Ikushima

et al. 2004

Fluid Phase Equilibria

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Section: Resultsmentioning

confidence: 99%

Temperature dependence of local density augmentation around exciplex in supercritical carbon dioxide

Aizawa

Kanakubo

Ikushima

et al. 2004

Fluid Phase Equilibria

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“…We allow the physical properties (α, β, and η) to vary in equation (6). At each time step, we calculate α, β, and η from p and T using PROPATH [PROPATH Group, 2008]. In this study, we use T and p at y = 0 to calculate α, β, and η, although T and p exhibit spatial variations in the y direction.…”

Section: Methodsmentioning

confidence: 99%

“…The phase transition from liquid to supercritical phases changes α, β, and η among physical properties of water by a few orders of magnitude [PROPATH Group, 2008]. Equation (6) reveals that the diffusion of pore pressure depends on α/β and hydraulic diffusivity, ω ≡ k/(ηβϕ).The α/β plays a role in increasing the pore pressure by a temperature increase, whereas ω decreases the pore pressure by diffusion.…”

Section: Rupture Processes Simulated With Physical Properties Of Watementioning

confidence: 99%

“…They observed a decrease of approximately 0.05 in the friction coefficient during the transition between liquid and vapor. The phase transition between the liquid and supercritical phases causes changes of a few orders of magnitude in viscosity, compressibility, and thermal expansion among physical properties of water [PROPATH Group, 2008]. It is expected that such changes affect TP, because these physical properties are involved in the diffusion equation of pore pressure.…”

Section: Introductionmentioning

confidence: 99%

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Effect of water phase transition on dynamic ruptures with thermal pressurization: Numerical simulations with changes in physical properties of water

2015

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Phase transitions of pore water have never been considered in dynamic rupture simulations with thermal pressurization (TP), although they may control TP. From numerical simulations of dynamic rupture propagation including TP, in the absence of any water phase transition process, we predict that frictional heating and TP are likely to change liquid pore water into supercritical water for a strike-slip fault under depth-dependent stress. This phase transition causes changes of a few orders of magnitude in viscosity, compressibility, and thermal expansion among physical properties of water, thus affecting the diffusion of pore pressure. Accordingly, we perform numerical simulations of dynamic ruptures with TP, considering physical properties that vary with the pressure and temperature of pore water on a fault. To observe the effects of the phase transition, we assume uniform initial stress and no fault-normal variations in fluid density and viscosity. The results suggest that the varying physical properties decrease the total slip in cases with high stress at depth and small shear zone thickness. When fault-normal variations in fluid density and viscosity are included in the diffusion equation, they activate TP much earlier than the phase transition. As a consequence, the total slip becomes greater than that in the case with constant physical properties, eradicating the phase transition effect. Varying physical properties do not affect the rupture velocity, irrespective of the fault-normal variations. Thus, the phase transition of pore water has little effect on dynamic ruptures. Fault-normal variations in fluid density and viscosity may play a more significant role.

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“…Using the PROPATH 12.1 [6] as the steam table, TAPINS also calculates the several state derivatives needed in the numerical method. The properties of the metastable liquid are obtained from the Taylor series expansions.…”

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confidence: 99%

Assessment of TAPINS code for application to thermal-hydraulic analysis of an integral reactor, REX-10

Lee

Park

2013

Journal of Nuclear Science and Technology

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The thermal-hydraulic analysis program for integral reactor system (TAPINS) is a thermal-hydraulic system code developed by Seoul National University for transient analysis of an integral reactor, REX-10. Specialized for a fully passive integral pressurized water reactor, TAPINS adopts a one-dimensional fourequation drift-flux model for two-phase flows. It also consists of component models for the core, the helicalcoil steam generator, and the steam-gas pressurizer. This paper presents the developmental assessment of TAPINS to validate its applicability to the thermal-hydraulic analysis of REX-10. Assessment problems are determined by taking into account thermal-hydraulic phenomena expected during design basis accidents of REX-10, including the loss-of-feedwater accident and the small-break loss-of-coolant accident. To confirm the predictive capability of TAPINS for these phenomena, the TAPINS model is validated against four sets of separate effects problems, including the pressurizer insurge test, the subcooled boiling experiment, the critical flow test, and the Edwards pipe problem. In addition, the calculation results of TAPINS are compared with the experimental data obtained from a series of integral effects tests using a scaled apparatus of REX-10. From the validation results, it is demonstrated that TAPINS can provide the reasonable prediction on the thermal-hydraulic responses of REX-10 during the transient and accident conditions.

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PROPATH: A Function Type Computer Program Package for Thermophysical Properties of Fluids.

Cited by 15 publications

References 0 publications

Temperature dependence of local density augmentation around exciplex in supercritical carbon dioxide

Temperature dependence of local density augmentation around exciplex in supercritical carbon dioxide

Effect of water phase transition on dynamic ruptures with thermal pressurization: Numerical simulations with changes in physical properties of water

Assessment of TAPINS code for application to thermal-hydraulic analysis of an integral reactor, REX-10

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