Shock capturing schemes with local mesh adaptation for high speed compressible flows on three dimensional unstructured grids

Nguyen, Vinh-Tan; Nguyen, Hoang Huy; Price, Matthew A.; Tan, Jaik Kwang

doi:10.1016/j.compfluid.2012.09.011

Cited by 5 publications

(10 citation statements)

References 19 publications

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“…Alternatively, a corrected least-squares method can be used [32]. Slope limiters, Φ, are used to control instabilities near steep gradients during reconstruction.…”

Section: Extension To Second-order Accuracy 260mentioning

confidence: 99%

“…A median dual mesh is constructed by connecting edge midpoints, element centroids, and face centroids such that only one node is present in each control volume Ω I [32]. The control volume around node I, shown in Fig.…”

Section: Edge-based Finite Volume Discretizationmentioning

confidence: 99%

“…To obtain a second-order accurate method, the local Riemann problem is solved with reconstructed values at the face centroid for the left and right states [32]. …”

Section: Extension To Second-order Accuracy 260mentioning

confidence: 99%

“…Barth [23] or TVD type limiters [32], were found to give satisfactory results during one-dimensional type flow tests, but failed to control instabilities for more complex three-dimensional cases.…”

Section: Extension To Second-order Accuracy 260mentioning

confidence: 99%

“…The bursting sphere approach with TNT equivalent charge weight is a common method for modeling airblast [27, 26,32]. Unfortunately, TNT equivalence 105 values are highly subjective as they depend on standoff distance and may be obtained through a variety of methods (e.g.…”

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confidence: 99%

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A method for compressible multimaterial flows with condensed phase explosive detonation and airblast on unstructured grids

et al. 2015

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“…Alternatively, a corrected least-squares method can be used [32]. Slope limiters, Φ, are used to control instabilities near steep gradients during reconstruction.…”

Section: Extension To Second-order Accuracy 260mentioning

confidence: 99%

Section: Edge-based Finite Volume Discretizationmentioning

confidence: 99%

“…To obtain a second-order accurate method, the local Riemann problem is solved with reconstructed values at the face centroid for the left and right states [32]. …”

Section: Extension To Second-order Accuracy 260mentioning

confidence: 99%

Section: Extension To Second-order Accuracy 260mentioning

confidence: 99%

mentioning

confidence: 99%

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A method for compressible multimaterial flows with condensed phase explosive detonation and airblast on unstructured grids

et al. 2015

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An Euler–Lagrange particle approach for modeling fragments accelerated by explosive detonation

Price

Nguyen

Hassan

et al. 2015

Numerical Meth Engineering

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SUMMARYIn this paper, a method is proposed for modeling explosive-driven fragments as spherical particles with a point-particle approach. Lagrangian particles are coupled with a multimaterial Eulerian solver that uses a three-dimensional finite volume framework on unstructured grids. The Euler-Lagrange method provides a straightforward and inexpensive alternative to directly resolving particle surfaces or coupling with structural dynamics solvers. The importance of the drag and inviscid unsteady particle forces is shown through investigations of particles accelerated in shock tube experiments and in condensed phase explosive detonation. Numerical experiments are conducted to study the acceleration of isolated explosive-driven particles at various locations relative to the explosive surface. The point-particle method predicts fragment terminal velocities that are in good agreement with simulations where particles are fully resolved, while using a computational cell size that is eight times larger. It is determined that inviscid unsteady forces are dominating for particles sitting on, or embedded in, the explosive charge. The effect of explosive confinement, provided by multiple particles, is investigated through a numerical study with a cylindrical C4 charge. Decreasing particle spacing, until particles are touching, causes a 30-50% increase in particle terminal velocity and similar increase in gas impulse.

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A feature-based mesh adaptation for the unsteady high speed compressible flows in complex three-dimensional domains

Nguyen

Price

et al. 2016

Applied Mathematical Modelling

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Shock capturing schemes with local mesh adaptation for high speed compressible flows on three dimensional unstructured grids

Cited by 5 publications

References 19 publications

A method for compressible multimaterial flows with condensed phase explosive detonation and airblast on unstructured grids

A method for compressible multimaterial flows with condensed phase explosive detonation and airblast on unstructured grids

An Euler–Lagrange particle approach for modeling fragments accelerated by explosive detonation

A feature-based mesh adaptation for the unsteady high speed compressible flows in complex three-dimensional domains

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