An interface capturing method for liquid-gas flows at low-Mach number

Barba, Federico Dalla; Scapin, Nicolò; Demou, Andreas D.; Rosti, Marco E.; Picano, Francesco; Brandt, Luca

doi:10.1016/j.compfluid.2020.104789

Cited by 9 publications

(4 citation statements)

References 68 publications

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“…In the future, we aim to improve the code maintainability and portability (both on CPU and GPU) and to release additional modules under development, e.g. weak compressibility and phase change [43,44]. Further efforts will be devoted to enhance the code performance on multiple GPUs nodes, reducing the current communication bottlenecks.…”

Section: Conclusion and Further Developmentsmentioning

confidence: 99%

“…The version available in our group has been validated in [34] and extensively employed in a different variety of multiphase configurations, both for laminar [35,36,37] and turbulent [38,39,40,41] flows. Note that it has been extended to phase changing flows [42] and also to handle weakly compressible multiphase flows (low-Mach approximation) [43,44].…”

Section: Introductionmentioning

confidence: 99%

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FluTAS: A GPU-accelerated finite difference code for multiphase flows

Crialesi-Esposito¹,

Scapin²,

Demou³

et al. 2022

Preprint

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We present the Fluid Transport Accelerated Solver, FluTAS, a scalable GPU code for multiphase flows with thermal effects. The code solves the incompressible Navier-Stokes equation for two-fluid systems, with a direct FFTbased Poisson solver for the pressure equation. The interface between the two fluids is represented with the Volume of Fluid (VoF) method, which is mass conserving and well suited for complex flows thanks to its capacity of handling topological changes. The energy equation is explicitly solved and coupled with the momentum equation through the Boussinesq approximation. The code is conceived in a modular fashion so that different numerical methods can be used independently, the existing routines can be modified, and new ones can be included in a straightforward and sustainable manner. FluTAS is written in modern Fortran and parallelized using hybrid * M.C-E. and N.S. contributed equally to this work.

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Section: Conclusion and Further Developmentsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

FluTAS: A GPU-accelerated finite difference code for multiphase flows

Crialesi-Esposito¹,

Scapin²,

Demou³

et al. 2022

Preprint

Self Cite

View full text Add to dashboard Cite

show abstract

“…Interface capture is one of the most prominent issues for accurate two-phase modeling [8]. Various interface tracking models have been proposed to improve the accuracy of simulating multiphase flow interfaces.…”

Section: Introductionmentioning

confidence: 99%

Numerical Study on Behaviors of the Sloshing Liquid Oxygen Tanks

Zhang

Chen²,

Gao³

et al. 2022

Energies

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In marine storage and transportation, the sloshing of liquid oxygen disturbs the thermodynamic equilibrium and induces stress on tank walls. Numerous problems are associated with the sloshing mechanism and demand a detailed investigation. In this study, a numerical model is developed by coupling the Eulerian framework and the algebraic interface area density (AIAD) method while considering the interphase drag force to investigate the thermal behavior of sloshing liquid oxygen. The effect of the sloshing frequency on the evaporation performance of liquid oxygen is studied. Moreover, anti-sloshing is conducted by employing a T-shaped baffle. The results show that the sloshing induced a vapor explosion phenomenon due to the invalidation of the surface impedance and thermal destratification to enhance free convection, resulting in rapid depressurization and increased evaporation loss. In addition, maximum evaporation loss occurred under the vapor–liquid coupling excitation condition. The T-shaped baffle has an excellent anti-sloshing effect because of the generating tip vortices and the enhanced shearing effect of the walls, which are regarded as motion damping factors.

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“…Moreover, it has the advantage of preventing pressure oscillations at interfaces, since the pressure is solved for and not retrieved from the energy. This approach was mainly employed in single-phase cases (for example [38]), with only a small number of studies devoted to weakly compressible multiphase flows, such as [39] based on the Baer-Nunziato model, and other sharp interface methods [34,40,33,41]. These few studies showed promising results, both in terms of numerical efficiency and overall performance for several test cases such as bubble oscillations, explosion shocks, oscillating water column, etc.…”

Section: Introductionmentioning

confidence: 99%

A pressure-based diffuse interface method for low-Mach multiphase flows with mass transfer

Demou,

Scapin,

Pelanti

et al. 2021

Preprint

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This study presents a novel pressure-based methodology for the efficient numerical solution of a four-equation two-phase diffuse interface model. The proposed methodology has the potential to simulate low-Mach flows with mass transfer. In contrast to the classical conservative four-equation model formulation, the adopted set of equations features volume fraction, temperature, velocity and pressure as the primary variables. The model includes the effects of viscosity, surface tension, thermal conductivity and gravity, and has the ability to incorporate complex equations of state. Additionally, a Gibbs free energy relaxation procedure is used to model mass transfer. A key characteristic of the proposed methodology is the use of high performance and scalable solvers for the solution of the Helmholtz equation for the pressure, which drastically reduces the computational cost compared to analogous density-based approaches. We demonstrate the capabilities of the methodology to simulate flows with large density and viscosity ratios through extended verification against a range of different test cases. Finally, the potential of the methodology to tackle challenging phase change flows is demonstrated with the simulation of three-dimensional nucleate boiling.

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An interface capturing method for liquid-gas flows at low-Mach number

Cited by 9 publications

References 68 publications

FluTAS: A GPU-accelerated finite difference code for multiphase flows

FluTAS: A GPU-accelerated finite difference code for multiphase flows

Numerical Study on Behaviors of the Sloshing Liquid Oxygen Tanks

A pressure-based diffuse interface method for low-Mach multiphase flows with mass transfer

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