A diffuse interface model of reactive-fluids and solid-dynamics

Wallis, Tim; Barton, Philip T.; Nikiforakis, Nikolaos

doi:10.1016/j.compstruc.2021.106578

Cited by 14 publications

(18 citation statements)

References 40 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Firstly, the full multi-material base system of equations and its thermodynamics will be briefly outlined. The base system has been laid out in detail in previous works [2,33,34] and is not affected by the later additions of a rigid body, so shall not be repeated here in depth. Subsequently, the additional components required for the rigid body will be introduced.…”

Section: Governing Theorymentioning

confidence: 99%

“…Some multi-physics closure models introduce a dependence on material history variables. For example, the equivalent plastic strain ε p(l) or the damage parameter D (l) in the case of fracture [33], or the reaction progress variable λ for reactive fluid mixtures [34]. For these variables, additional evolution equations are required:…”

Section: Base System 211 Evolution Equationsmentioning

confidence: 99%

“…There are several multiphysics aspects to this test. Firstly, the explosive LX-17 is modelled using the multi-phase formulation detailed by Wallis et al [34], where both the reactants and products are explicitly modelled as a mixture with distinct equations of state. This mixture is then treated as one material for the purposes of bookkeeping, and the reaction progress variable λ is added to the full multi-material system of equations in order to track the reaction: ∂φ (l) ρ (l) λ (l) ∂t + ∂φ (l) ρ (l) λ (l) u k ∂x k = φ (l) ρ (l) λ(l) .…”

Section: Lx-17 Corner Turningmentioning

confidence: 99%

“…Other parameters are material dependent constants, given in Table 4. Full details of the method are given by Wallis et al [34].…”

Section: Stereolithography (Stl) Geometrymentioning

confidence: 99%

“…The new methods developed in this work are entirely compatible with the previous works on which it is based, as the same underlying multi-material system of equations employed by Wallis et al [33] is used here. This allows the new rigid body method to be applied to a wide variety of applications, including single material fluid flow, elastoplastic-rigid interaction, and reactive fluid mixtures (as presented by Wallis et al [34]). This work will therefore present a number of validation cases covering this range, with both experimental and numerical comparison.…”

Section: Introductionmentioning

confidence: 99%

See 4 more Smart Citations

A unified diffuse interface method for the interaction of rigid bodies with elastoplastic solids and multi-phase mixtures

Wallis,

Barton,

Nikiforakis

2021

Preprint

Self Cite

View full text Add to dashboard Cite

This work outlines a new multi-physics-compatible immersed rigid body method for Eulerian finite-volume simulations. To achieve this, rigid bodies are represented as a diffuse scalar field and an interface seeding method is employed to mediate the interface boundary conditions. The method is based on an existing multi-material diffuse interface method that is capable of handling an arbitrary mix of fluids and elastoplastic solids. The underlying method is general and can be extended to a range of different applications including high-strain rate deformation in elastoplastic solids and reactive fluid mixtures. As such, the new method presented here is thoroughly tested through a variety of problems, including fluid-rigid body interaction, elastoplastic-rigid body interaction, and detonation-structure interaction. Comparison is drawn between both experimental work and previous numerical results, with excellent agreement in both cases. The new method is straightforward to implement, highly local, and parallelisable. This allows the method to be employed in three dimensions with multiple levels of adaptive mesh refinement using complex immersed geometries. The rigid body field can be static or dynamic, with the THINC interface reconstruction method being used to keep the interface sharp in the dynamic case.

show abstract

Section: Governing Theorymentioning

confidence: 99%

Section: Base System 211 Evolution Equationsmentioning

confidence: 99%

Section: Lx-17 Corner Turningmentioning

confidence: 99%

“…Other parameters are material dependent constants, given in Table 4. Full details of the method are given by Wallis et al [34].…”

Section: Stereolithography (Stl) Geometrymentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

A unified diffuse interface method for the interaction of rigid bodies with elastoplastic solids and multi-phase mixtures

Wallis,

Barton,

Nikiforakis

2021

Preprint

Self Cite

View full text Add to dashboard Cite

show abstract

CWENO Finite-Volume Interface Capturing Schemes for Multicomponent Flows Using Unstructured Meshes

et al. 2021

View full text Add to dashboard Cite

In this paper we extend the application of unstructured high-order finite-volume central-weighted essentially non-oscillatory (CWENO) schemes to multicomponent flows using the interface capturing paradigm. The developed method achieves high-order accurate solution in smooth regions, while providing oscillation free solutions at discontinuous regions. The schemes are inherently compact in the sense that the central stencils employed are as compact as possible, and that the directional stencils are reduced in size, therefore simplifying their implementation. Several parameters that influence the performance of the schemes are investigated, such as reconstruction variables and their reconstruction order. The performance of the schemes is assessed under a series of stringent test problems consisting of various combinations of gases and liquids, and compared against analytical solutions, computational and experimental results available in the literature. The results obtained demonstrate the robustness of the new schemes for several applications, as well as their limitations within the present interface-capturing implementation.

show abstract

A Conservative Sharp-Interface Numerical Method for Two-dimensional Compressible Two-phase Flows

Bai,

2023

J Sci Comput

View full text Add to dashboard Cite

A diffuse interface model of reactive-fluids and solid-dynamics

Cited by 14 publications

References 40 publications

A unified diffuse interface method for the interaction of rigid bodies with elastoplastic solids and multi-phase mixtures

A unified diffuse interface method for the interaction of rigid bodies with elastoplastic solids and multi-phase mixtures

CWENO Finite-Volume Interface Capturing Schemes for Multicomponent Flows Using Unstructured Meshes

A Conservative Sharp-Interface Numerical Method for Two-dimensional Compressible Two-phase Flows

Contact Info

Product

Resources

About