Simulation of blast wave propagation over a cylinder

Ofengeim, D. Kh.; Drikakis, Dimitris

doi:10.1007/s001930050085

Cited by 54 publications

(25 citation statements)

References 11 publications

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“…In the real case, the air flows will be turbulent, but the flow Reynolds numbers will be so high that inertia forces will be dominant over most of the flow domain during the timescales of interest [Ofengeim and Drikakis 1997]. The only important exception to this rule will be local contractions in flow as air passes through the holes/slots in the wall.…”

Section: Theoretical Approachmentioning

confidence: 99%

Perforated exit regions for the reduction of micro-pressure waves from tunnels

Wang

Vardy

Pokrajac

2015

Journal of Wind Engineering and Industrial Aerodynamics

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Section: Theoretical Approachmentioning

confidence: 99%

Perforated exit regions for the reduction of micro-pressure waves from tunnels

Wang

Vardy

Pokrajac

2015

Journal of Wind Engineering and Industrial Aerodynamics

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“…A blast wave arises due to the rapid release of energy in a gas. A typical pressure-time curve for an explosive blast wave is presented in [22].…”

Section: Blast Wave Problemmentioning

confidence: 99%

“…To derive the stability condition of the coupled model, we must first transform the interface conditions using the above pressure-displacement formulation (20)- (22). From (20), the velocity continuity can be expressed as…”

Section: Transformation Of Interface Conditionsmentioning

confidence: 99%

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Conservative load transfer along curved fluid–solid interface with non-matching meshes

Jaiman

Jiao

Geubelle

et al. 2006

Journal of Computational Physics

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We investigate the effect of curvature on the accuracy of schemes used to transfer loads along the interface in coupled fluid-solid simulations involving non-matching meshes. We analyze two types of load transfer schemes for the coupled system: (a) point-to-element projection schemes and (b) common-refinement schemes. The accuracy of these schemes over the curved interface is assessed with the aid of static and transient problems. We show that the point-to-element projection schemes may yield inaccurate load transfer from the source fluid mesh to the target solid mesh, leading to a weak instability in the form of spurious oscillations and overshoots in the interface solution. The common-refinement scheme resolves this problem by providing an accurate transfer of discrete interface conditions across non-matching meshes. We show theoretically that the accurate transfer preserves the stability of the coupled system while maintaining the energy conservation over a reference interface. Finally, we introduce simple analytical error functions which correlate well with the numerical errors of the load transfer schemes.

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“…[2] proposed the physical virtual model in which this immersed boundary was represented with a finite number of Lagrangian points, distributed over the solid-fluid interface. Ofengeim and Drikakis [3] presented numerical research on the interaction of plane blast waves and a cylinder, revealing that the blast-wave duration significantly influenced the unsteady flow around the cylinder. Breuer [4] computed the turbulent flow around a cylinder (Re = 3900) via large eddy simulation.…”

Section: Introductionmentioning

confidence: 99%

Numerical Modeling of Wave-Current Flow around Cylinders Using an Enhanced Equilibrium Bhatnagar-Gross-Krook Scheme

Xing

Liu

Ding

et al. 2018

Mathematical Problems in Engineering

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Flow around cylinders is a classic issue of fluid mechanics and it has great significance in engineering fields. In this study, a twodimensional hydrodynamic lattice Boltzmann numerical model is proposed, coupling wave radiation stress, bed shear stress, and wind shear stress, which is able to simulate wave propagation of flow around cylinders. It is based on shallow water equations and a weight factor is applied for the force term. An enhanced equilibrium Bhatnagar-Gross-Krook (BGK) scheme is developed to treat the wave radiation stress term in collision step. This model is tested and verified by two cases: the first case is the flow around a single circular cylinder, where the flow is driven by current, wave, or both wave and current, respectively, and the second case is the solitary waves moving around cylinders. The results illustrate the correctness of this model, which could be used to analyze the detailed flow pattern around a cylinder.

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Simulation of blast wave propagation over a cylinder

Cited by 54 publications

References 11 publications

Perforated exit regions for the reduction of micro-pressure waves from tunnels

Perforated exit regions for the reduction of micro-pressure waves from tunnels

Conservative load transfer along curved fluid–solid interface with non-matching meshes

Numerical Modeling of Wave-Current Flow around Cylinders Using an Enhanced Equilibrium Bhatnagar-Gross-Krook Scheme

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