Volume of fluid approach of boiling flows in concentrated solar plants

Dinsenmeyer, Rémi; Fourmigué, Jean-François; Caney, Nadia; Marty, Philippe

doi:10.1016/j.ijheatfluidflow.2017.04.011

Cited by 13 publications

(6 citation statements)

References 24 publications

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“…The Fluent VOF scheme has been widely validated for this type of problem, with plenty of examples available in the recent literature. Dinsenmeyer et al [23] positively compared their Fluent slug flow simulations with experiments, looking at the frequency of the onset of slugs. Das et al [24] investigated the influence of surface tension on bubble formation, detachment, and onset of sliding underneath an inclined surface.…”

Section: Vof Modelmentioning

confidence: 99%

Coupled CFD-Response Surface Method (RSM) Methodology for Optimizing Jettability Operating Conditions

et al. 2018

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A volume-of-fluid (VOF) finite volume model under the ANSYS® Fluent framework was coupled with the response surface method (RSM) to find the best operating conditions within a jettability window for two selected responses in a drop-on-demand inkjet printing process. Twenty-five runs were generated using a face centred design and numerical simulations were carried out using viscosity, surface tension, nozzle diameter, and inlet velocity as input factors. A mesh study was first conducted to establish the necessary number of cells to best combine accuracy and expended time. Selected runs were discussed, identifying the underpinning mechanisms behind the droplet generation at different time periods. Each one of the responses was evaluated under different input factors and their effects were identified. Finally, the desirability function concept was advantageously used to proceed with a multiple optimization where all the responses were targeted under usual jettability/printability conditions.

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Section: Vof Modelmentioning

confidence: 99%

Coupled CFD-Response Surface Method (RSM) Methodology for Optimizing Jettability Operating Conditions

et al. 2018

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“…If the application differed from the one in the solar receivers, the physics inside the tube remained the same, as explained in Section 2.1. As in Dinsenmeyer [26,27], we therefore assessed the suitability of our approach by verifying that it was able to reproduce the regime transitions observed by Yang [1]; however, we proposed an original approach-this case being the first time, to our knowledge-in which we evaluated the mesh convergence of the method, and proposed original post-processing, to unravel the characteristics of the flow and the heat transfers in this setup. [15].…”

Section: Introductionmentioning

confidence: 97%

“…Most of the literature concerns vertical two-phase flows [20][21][22]; few experimental studies in horizontal configuration have been carried out [23][24][25] for liquid-vapor or air-water flows. No visualization of the flow had been provided, which was inconvenient for locating regime transitions; however, Yang undertook, in 2008, an experimental study on freon ebullition, providing visualizations of liquid-vapor interface inside the tube [1]: latterly, this work has been used to confront numerical simulations of liquid-vapor two-phase flows on Fluent 14.5 software [26,27]. Due to the lack of experimental data in the literature, this experiment was chosen as a comparative tool to validate the numerical model developed in this work.…”

Section: Introductionmentioning

confidence: 99%

Euler–Euler Multi-Scale Simulations of Internal Boiling Flow with Conjugated Heat Transfer

2023

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A numerical approach was implemented, to study a boiling flow in a horizontal serpentine tube. A NEPTUNE_CFD two-fluid model was used, to study the behavior of the refrigerant R141b in diabatic cases. The model was based on the Euler–Euler formalism of the Navier–Stokes equations, in which governing equations are solved for both phases of the fluid at each time step. The conjugate heat transfer—between the tube wall and the fluid—was considered via a coupling with the SYRTHES 4.3 software, which solves solid conduction in three dimensions. A mesh convergence study was carried out, which found that a resolution of 40 meshes per diameter was necessary for our case. The approach was validated by comparison with an experimental study of the literature, based on the faithful reproduction of the positions of two-phase flow regime transitions in the domain. Original post-processing was used, to unravel the flow characteristics. The mean and RMS fields of void fraction, temperatures and stream wise velocities in several sections were analyzed, when statistical convergence was reached. A thermal equilibrium was reached in the saturated liquid, but not in the vapor phase, due to the flow dynamic and possibly the presence of droplets. Finally, a thermal analysis of the configuration was proposed. It demonstrated the strong coupling between the temperature distribution in the solid, and the two-phase flow regimes at stake in the fluid domain.

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“…The production of steam is then made directly in the receiver, these plants are called DSG (Direct Steam Generation). In this type of receiver, the water entering the solar field heats up to its saturation temperature and evaporates to create a boiling water/steam flow (Dinsenmeyer, 2015;Dinsenmeyer et al, 2017;Lobon et al, 2014). The solar field is dimensioned to prevent the water from evaporating completely before it exits the solar field.…”

Section: Introductionmentioning

confidence: 99%

CFD investigation of level fluctuations in steam accumulators as thermal storage: A direct steam generation application

et al. 2022

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Volume of fluid approach of boiling flows in concentrated solar plants

Cited by 13 publications

References 24 publications

Coupled CFD-Response Surface Method (RSM) Methodology for Optimizing Jettability Operating Conditions

Coupled CFD-Response Surface Method (RSM) Methodology for Optimizing Jettability Operating Conditions

Euler–Euler Multi-Scale Simulations of Internal Boiling Flow with Conjugated Heat Transfer

CFD investigation of level fluctuations in steam accumulators as thermal storage: A direct steam generation application

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