Comprehensive Evaluation of the Massively Parallel Direct Simulation Monte Carlo Kernel “Stochastic Parallel Rarefied-Gas Time-Accurate Analyzer” in Rarefied Hypersonic Flows—Part A: Fundamentals
The Direct Simulation Monte Carlo (DSMC) method, introduced by Graeme Bird over five decades ago, has become a crucial statistical particle-based technique for simulating low-density gas flows. Its widespread acceptance stems from rigorous validation against experimental data. This study focuses on...
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MDPI AG
2024-10-01
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| author | Angelos Klothakis Ioannis K. Nikolos |
| author_facet | Angelos Klothakis Ioannis K. Nikolos |
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| description | The Direct Simulation Monte Carlo (DSMC) method, introduced by Graeme Bird over five decades ago, has become a crucial statistical particle-based technique for simulating low-density gas flows. Its widespread acceptance stems from rigorous validation against experimental data. This study focuses on four validation test cases known for their complex shock–boundary and shock–shock interactions: (a) a flat plate in hypersonic flow, (b) a Mach 20.2 flow over a 70-degree interplanetary probe, (c) a hypersonic flow around a flared cylinder, and (d) a hypersonic flow around a biconic. Part A of this paper covers the first two cases, while Part B will discuss the remaining cases. These scenarios have been extensively used by researchers to validate prominent parallel DSMC solvers, due to the challenging nature of the flow features involved. The validation requires meticulous selection of simulation parameters, including particle count, grid density, and time steps. This work evaluates the SPARTA (Stochastic Parallel Rarefied-gas Time-Accurate Analyzer) kernel’s accuracy against these test cases, highlighting its parallel processing capability via domain decomposition and MPI communication. This method promises substantial improvements in computational efficiency and accuracy for complex hypersonic vehicle simulations. |
| format | Article |
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| institution | OA Journals |
| issn | 2079-3197 |
| language | English |
| publishDate | 2024-10-01 |
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| spelling | doaj-art-4bab21fb674a4f5c93ab7d6fd2f7a05b2025-08-20T02:11:15ZengMDPI AGComputation2079-31972024-10-01121019810.3390/computation12100198Comprehensive Evaluation of the Massively Parallel Direct Simulation Monte Carlo Kernel “Stochastic Parallel Rarefied-Gas Time-Accurate Analyzer” in Rarefied Hypersonic Flows—Part A: FundamentalsAngelos Klothakis0Ioannis K. Nikolos1Turbomachines and Fluid Dynamics Laboratory, School of Production Engineering and Management, Technical University of Crete, 73100 Chania, GreeceTurbomachines and Fluid Dynamics Laboratory, School of Production Engineering and Management, Technical University of Crete, 73100 Chania, GreeceThe Direct Simulation Monte Carlo (DSMC) method, introduced by Graeme Bird over five decades ago, has become a crucial statistical particle-based technique for simulating low-density gas flows. Its widespread acceptance stems from rigorous validation against experimental data. This study focuses on four validation test cases known for their complex shock–boundary and shock–shock interactions: (a) a flat plate in hypersonic flow, (b) a Mach 20.2 flow over a 70-degree interplanetary probe, (c) a hypersonic flow around a flared cylinder, and (d) a hypersonic flow around a biconic. Part A of this paper covers the first two cases, while Part B will discuss the remaining cases. These scenarios have been extensively used by researchers to validate prominent parallel DSMC solvers, due to the challenging nature of the flow features involved. The validation requires meticulous selection of simulation parameters, including particle count, grid density, and time steps. This work evaluates the SPARTA (Stochastic Parallel Rarefied-gas Time-Accurate Analyzer) kernel’s accuracy against these test cases, highlighting its parallel processing capability via domain decomposition and MPI communication. This method promises substantial improvements in computational efficiency and accuracy for complex hypersonic vehicle simulations.https://www.mdpi.com/2079-3197/12/10/198hypersonic flowsDirect Simulation Monte Carloaerodynamic performancecomputational fluid dynamicshypersonic vehicles |
| spellingShingle | Angelos Klothakis Ioannis K. Nikolos Comprehensive Evaluation of the Massively Parallel Direct Simulation Monte Carlo Kernel “Stochastic Parallel Rarefied-Gas Time-Accurate Analyzer” in Rarefied Hypersonic Flows—Part A: Fundamentals Computation hypersonic flows Direct Simulation Monte Carlo aerodynamic performance computational fluid dynamics hypersonic vehicles |
| title | Comprehensive Evaluation of the Massively Parallel Direct Simulation Monte Carlo Kernel “Stochastic Parallel Rarefied-Gas Time-Accurate Analyzer” in Rarefied Hypersonic Flows—Part A: Fundamentals |
| title_full | Comprehensive Evaluation of the Massively Parallel Direct Simulation Monte Carlo Kernel “Stochastic Parallel Rarefied-Gas Time-Accurate Analyzer” in Rarefied Hypersonic Flows—Part A: Fundamentals |
| title_fullStr | Comprehensive Evaluation of the Massively Parallel Direct Simulation Monte Carlo Kernel “Stochastic Parallel Rarefied-Gas Time-Accurate Analyzer” in Rarefied Hypersonic Flows—Part A: Fundamentals |
| title_full_unstemmed | Comprehensive Evaluation of the Massively Parallel Direct Simulation Monte Carlo Kernel “Stochastic Parallel Rarefied-Gas Time-Accurate Analyzer” in Rarefied Hypersonic Flows—Part A: Fundamentals |
| title_short | Comprehensive Evaluation of the Massively Parallel Direct Simulation Monte Carlo Kernel “Stochastic Parallel Rarefied-Gas Time-Accurate Analyzer” in Rarefied Hypersonic Flows—Part A: Fundamentals |
| title_sort | comprehensive evaluation of the massively parallel direct simulation monte carlo kernel stochastic parallel rarefied gas time accurate analyzer in rarefied hypersonic flows part a fundamentals |
| topic | hypersonic flows Direct Simulation Monte Carlo aerodynamic performance computational fluid dynamics hypersonic vehicles |
| url | https://www.mdpi.com/2079-3197/12/10/198 |
| work_keys_str_mv | AT angelosklothakis comprehensiveevaluationofthemassivelyparalleldirectsimulationmontecarlokernelstochasticparallelrarefiedgastimeaccurateanalyzerinrarefiedhypersonicflowspartafundamentals AT ioannisknikolos comprehensiveevaluationofthemassivelyparalleldirectsimulationmontecarlokernelstochasticparallelrarefiedgastimeaccurateanalyzerinrarefiedhypersonicflowspartafundamentals |