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HighlightsA novel particle method is presented for violent wave impact problems.Laplacian and gradient operators are computed based on Taylor series expansion.Incompressible water and compressible air are simulated in a strongly-coupled way.OpenMP parallelization is implemented to significantly improve computational efficiency.Experimental studies of three-dimensional water sloshing and sloshing impact with entrapped air pocket are conducted on a rotational simulator for validation.
AbstractA shared-memory parallelization is implemented to the recently developed Consistent Particle. Method (CPM) for violent wave impact problems. The advantages of this relatively new particle method lie in four key aspects: (1) accurate computation of Laplacian and gradient operators based on Taylor series expansion, alleviating spurious pressure fluctuation and being able to model two-phase flows characterized by large density difference, (2) a thermodynamics-based compressible solver for modelling compressible air that eliminates the need of determining artificial sound speed, (3) seamless coupling of the compressible air solver and incompressible water solver, and (4) parallelization of the numerical model based on Open Multi-Processing (OpenMP) and a parallel direct sparse solver (Pardiso) to significantly improve computational efficiency. Strong and weak scaling analyses of the parallelized CPM are conducted, showing an efficiency speedup of 100 times or more depending on the size of simulated problem. To demonstrate the accuracy of the developed numerical model, three numerical examples are studied including the benchmark study of wave impact on seawall, and our experimental studies of violent water sloshing under rotational excitations and sloshing impact with entrapped air pocket. CPM is shown to accurately capture highly deformed breaking waves and violent wave impact pressure including pressure oscillation induced by air cushion effect.
HighlightsA novel particle method is presented for violent wave impact problems.Laplacian and gradient operators are computed based on Taylor series expansion.Incompressible water and compressible air are simulated in a strongly-coupled way.OpenMP parallelization is implemented to significantly improve computational efficiency.Experimental studies of three-dimensional water sloshing and sloshing impact with entrapped air pocket are conducted on a rotational simulator for validation.
AbstractA shared-memory parallelization is implemented to the recently developed Consistent Particle. Method (CPM) for violent wave impact problems. The advantages of this relatively new particle method lie in four key aspects: (1) accurate computation of Laplacian and gradient operators based on Taylor series expansion, alleviating spurious pressure fluctuation and being able to model two-phase flows characterized by large density difference, (2) a thermodynamics-based compressible solver for modelling compressible air that eliminates the need of determining artificial sound speed, (3) seamless coupling of the compressible air solver and incompressible water solver, and (4) parallelization of the numerical model based on Open Multi-Processing (OpenMP) and a parallel direct sparse solver (Pardiso) to significantly improve computational efficiency. Strong and weak scaling analyses of the parallelized CPM are conducted, showing an efficiency speedup of 100 times or more depending on the size of simulated problem. To demonstrate the accuracy of the developed numerical model, three numerical examples are studied including the benchmark study of wave impact on seawall, and our experimental studies of violent water sloshing under rotational excitations and sloshing impact with entrapped air pocket. CPM is shown to accurately capture highly deformed breaking waves and violent wave impact pressure including pressure oscillation induced by air cushion effect.
Shared-Memory parallelization of consistent particle method for violent wave impact problems
Applied Ocean Research ; 69 ; 87-99
2017-09-30
13 pages
Article (Journal)
Electronic Resource
English
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