Fully compressible multiphase model for computation of compressible fluid flows with large density ratio and the presence of shock waves

Nguyen, Van-Tu; Phan, Thanh-Hoang; Duy, Trong-Nguyen; Kim, Dong-Hyun; Park, Warn-Gyu

doi:10.1016/j.compfluid.2022.105325

Cited by 13 publications

(2 citation statements)

References 66 publications

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“…Discretizing the equation system using standard compressible multiphase flow solvers and consistent coupling with the advection equations can provide a solution with oscillation-free behaviors at the interface (Allaire et al , 2002). However, these provide large diffusion errors at the interface and cannot maintain a sharp interface, resulting in inaccurate solutions (Nguyen et al , 2022). To overcome this issue, THINC method is implemented in our compressible multiphase code.…”

Section: Introductionmentioning

confidence: 99%

An arbitrary Lagrangian–Eulerian method for fluid–structure interactions due to underwater explosions

Löhner

Soto

et al. 2023

HFF

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Purpose This study aims to evaluate blast loads on and the response of submerged structures. Design/methodology/approach An arbitrary Lagrangian–Eulerian method is developed to model fluid–structure interaction (FSI) problems of close-in underwater explosions (UNDEX). The “fluid” part provides the loads for the structure considers air, water and high explosive materials. The spatial discretization for the fluid domain is performed with a second-order vertex-based finite volume scheme with a tangent of hyperbola interface capturing technique. The temporal discretization is based on explicit Runge–Kutta methods. The structure is described by a large-deformation Lagrangian formulation and discretized via finite elements. First, one-dimensional test cases are given to show that the numerical method is free of mesh movement effects. Thereafter, three-dimensional FSI problems of close-in UNDEX are studied. Finally, the computation of UNDEX near a ship compartment is performed. Findings The difference in the flow mechanisms between rigid targets and deforming targets is quantified and evaluated. Research limitations/implications Cavitation is modeled only approximately and may require further refinement/modeling. Practical implications The results demonstrate that the proposed numerical method is accurate, robust and versatile for practical use. Social implications Better design of naval infrastructure [such as bridges, ports, etc.]. Originality/value To the best of the authors’ knowledge, this study has been conducted for the first time.

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Section: Introductionmentioning

confidence: 99%

An arbitrary Lagrangian–Eulerian method for fluid–structure interactions due to underwater explosions

Löhner

Soto

et al. 2023

HFF

View full text Add to dashboard Cite

show abstract

“…The volume proportion of each fluid within a computational grid cell was determined, and the contact sites between the fluids were identified. The accurate computation of fluid properties, flow velocities, and contact locations as change over time is made possible by the Volume of Fluid (VOF) Method [36][37][38].…”

mentioning

confidence: 99%

Numerical Investigation of Multiphase Flow in 2D Microchannel Using Volume of Fluid Method: A Study on Water Droplet Dynamics

Sattar,

Bofeng,

Manzoor

et al. 2024

Preprint

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The study encompasses the visualization and analysis of dynamic water behavior, pressure drop, and saturation interaction under various boundary condition cases. Additionally, the characteristics of the flow in and out of the two-dimensional (2D) channel and the microinjection of water droplets are investigated. The simulations via the Volume of Fluid (VOF) Method include modeling liquid water dynamics with different wall angles in the 2D channel, considering varying air and water inlet velocities. Key parameters such as water volume fraction and pressure drop are thoroughly analyzed. The simulation results demonstrate substantial agreement with the integral characteristics of the process, including dynamics trend, induction time of droplet breakup (saturation phase), and pressure drop. This comprehensive analysis enhances understanding of water droplet dynamics in microchannels and contributes to the optimization of microfluidic devices for a spectrum of applications, from drug delivery to chemical reactions.

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Numerical study of shock waves and supersonic jets triggered by cavitation bubble collapse in different pressurized ambiences

Nguyen,

Phan,

Park

et al. 2024

J Mech Sci Technol

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Fully compressible multiphase model for computation of compressible fluid flows with large density ratio and the presence of shock waves

Cited by 13 publications

References 66 publications

An arbitrary Lagrangian–Eulerian method for fluid–structure interactions due to underwater explosions

An arbitrary Lagrangian–Eulerian method for fluid–structure interactions due to underwater explosions

Numerical Investigation of Multiphase Flow in 2D Microchannel Using Volume of Fluid Method: A Study on Water Droplet Dynamics

Numerical study of shock waves and supersonic jets triggered by cavitation bubble collapse in different pressurized ambiences

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