openPSTD: The open source pseudospectral time-domain method for acoustic propagation

Hornikx, Maarten; Krijnen, TF Thomas; Harten, Louis van

doi:10.1016/j.cpc.2016.02.029

Cited by 24 publications

(18 citation statements)

References 16 publications

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“…Elston's PSTD approach, while an order of magnitude improvement on finite-difference time-domain (FDTD) methods, is numerically intensive; requiring simulation grid spacing of two nodes per wavelength, it is not suitable for applications requiring real-time responses over survey scale distances. Alternative GPU enabled PSTD implementations also do not meet real-time [15] but have benefit when applied to short-range ultrasonic modelling or near-field transducer beamforming investigations [16]. Early iterations of this work achieved real-time in comparison to Bell's model when benchmarked on off-the-shelf PC hardware but are limited to 2D ray tracing (i.e., infinitesimally narrow acrosstrack beam patterns) and restricted scenario sizes.…”

Section: Shortcomingsmentioning

confidence: 99%

Interdisciplinary Methodology to Extend Technology Readiness Levels in SONAR Simulation from Laboratory Validation to Hydrography Demonstrator

Riordan

Flannery²,

Toal

et al. 2019

JMSE

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This paper extends underwater SONAR simulation from laboratory prototype to real-world demonstrator. It presents the interdisciplinary methodology to advance the state of the art from level four to level seven on the technology readiness level (TRL) standard scale for measuring the maturity of innovations. While SONAR simulation offers the potential to unlock cost-effective personnel capacity building in hydrography, demonstration of virtualised survey-scale operations is a prerequisite for validation by practitioners. Our research approach uses the TRL framework to identify and map current barriers to the use of simulation to interdisciplinary solutions adapted from multiple domains. To meet the distinct challenges of acceptance tests at each level in the TRL scale, critical knowledge is incorporated from different branches of science, engineering, project management, and pedagogy. The paper reports the simulator development at each escalation of TRL. The contributions to simulator performance and usability at each level of advancement are presented, culminating in the first case study demonstration of SONAR simulation as a real-world hydrographic training platform.

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Section: Shortcomingsmentioning

confidence: 99%

Interdisciplinary Methodology to Extend Technology Readiness Levels in SONAR Simulation from Laboratory Validation to Hydrography Demonstrator

Riordan

Flannery²,

Toal

et al. 2019

JMSE

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“…Parallel wave-based solvers are used in a multitude of scientific domains, including the studying of seismic, electromagnetic, and acoustic waves. A large category of these solvers are parallel FDTD solvers either for large clusters [17,43,47,48] or for GPUs [31,36,40,41,45,35,19]. A category of parallel methods are also based on finite-element schemes [13,5].…”

Section: Parallel Wave-based Solversmentioning

confidence: 99%

MPARD: A high-frequency wave-based acoustic solver for very large compute clusters

Morales¹,

Chavda²,

Mehra³

et al. 2017

Applied Acoustics

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We present a parallel time-domain wave solver designed for large and high frequency acoustic domains. Our approach is based on a novel scalable method for dividing acoustic field computations specifically for large-scale distributed memory clusters using parallel Adaptive Rectangular Decomposition (ARD). In order to efficiently compute the acoustic field for large or high frequency domains, we need to take full advantage of the compute resources of large clusters. This is done with new algorithmic contributions, including a hypergraph partitioning scheme to reduce the communication cost between the cores on the cluster, a novel domain decomposition scheme that reduces the amount of numerical dispersion error introduced by the load balancing algorithm, and a revamped pipeline for parallel ARD computation that increases memory efficiency and reduces redundant computations. Our resulting parallel algorithm makes it possible to compute the sound pressure field for high frequencies in large environments that are thousands of cubic meters in volume. We highlight the performance of our system on large clusters with 16000 cores on homogeneous indoor and outdoor benchmarks up to 10 kHz. To the best of our knowledge, this is the first time-domain parallel acoustic wave solver that can handle such large domains and frequencies.

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“…The finite element method (FEM) [1][2][3][4][5], boundary element method (BEM) [6], and finite difference time domain (FDTD) [7][8][9] method exemplify the often-used numerical methods for room acoustic simulations. Although they entail a huge computational effort for acoustic simulations especially at kilohertz frequencies in a real-sized room, their application to room acoustics prediction is increasing gradually by virtue of the progress of computer technology and the continuous development of efficient methods [9][10][11][12][13][14][15][16][17][18][19][20][21][22][23][24]. In addition, some recent studies [16,18,22,25] use extended-reaction boundary conditions to address both the frequency dependent and incident-angle dependent absorption characteristics of sound absorbers accurately, whereas many studies use the simplest local-reaction boundary conditions, which simplify the incident-angle dependence of surface impedance.…”

Section: Introductionmentioning

confidence: 99%

Potential of Room Acoustic Solver with Plane-Wave Enriched Finite Element Method

2020

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Predicting room acoustics using wave-based numerical methods has attracted great attention in recent years. Nevertheless, wave-based predictions are generally computationally expensive for room acoustics simulations because of the large dimensions of architectural spaces, the wide audible frequency ranges, the complex boundary conditions, and inherent error properties of numerical methods. Therefore, development of an efficient wave-based room acoustic solver with smaller computational resources is extremely important for practical applications. This paper describes a preliminary study aimed at that development. We discuss the potential of the Partition of Unity Finite Element Method (PUFEM) as a room acoustic solver through the examination with 2D real-scale room acoustic problems. Low-order finite elements enriched by plane waves propagating in various directions are used herein. We examine the PUFEM performance against a standard FEM via two-room acoustic problems in a single room and a coupled room, respectively, including frequency-dependent complex impedance boundaries of Helmholtz resonator type sound absorbers and porous sound absorbers. Results demonstrated that the PUFEM can predict wideband frequency responses accurately under a single coarse mesh with much fewer degrees of freedom than the standard FEM. The reduction reaches O ( 10 − 2 ) at least, suggesting great potential of PUFEM for use as an efficient room acoustic solver.

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openPSTD: The open source pseudospectral time-domain method for acoustic propagation

Cited by 24 publications

References 16 publications

Interdisciplinary Methodology to Extend Technology Readiness Levels in SONAR Simulation from Laboratory Validation to Hydrography Demonstrator

Interdisciplinary Methodology to Extend Technology Readiness Levels in SONAR Simulation from Laboratory Validation to Hydrography Demonstrator

MPARD: A high-frequency wave-based acoustic solver for very large compute clusters

Potential of Room Acoustic Solver with Plane-Wave Enriched Finite Element Method

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