High-resolution multi-code implementation of unsteady Navier–Stokes flow solver based on paralleled overset adaptive mesh refinement and high-order low-dissipation hybrid schemes

Li, Gaohua; Fu, Xilin; Wang, Fuxin

doi:10.1080/10618562.2017.1387251

Cited by 13 publications

(4 citation statements)

References 19 publications

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“…Simulations were implemented with a high-ordered low-dissipated unsteady Navier–Stokes flow solver designed by Li et al. 29 This solver has successfully been applied in high-Reynolds cylinder flow, helicopter hovering, and shown great capabilities in vortex capturing. Using non-dimensional time-step (Δ T = T f U ∞ / c ) as 0.01 and y+ ≤1, CFL condition was satisfied to ensure the computation convergence.…”

Section: Numerical and Analytical Methodologymentioning

confidence: 99%

Study on vortex shedding mode on the wake of horn/ridge ice contamination under high-Reynolds conditions

Zhang

Liu

et al. 2019

Proceedings of the Institution of Mechanical Engineers, Part G:

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This paper studied the unsteadiness of vortex motion produced by a three-dimensional wing section with horn/ridge ice contamination. Using improved delayed detached eddy simulation method, multi-scale vortex and their associated flow structures were successfully captured. Results have shown a diversity of unsteadiness scales at different time series, including shear layer instability, vortex pairing, co-rotating and breaking up. Proper orthogonal decomposition was then introduced to extract the characteristic vortex shedding modes with scheduling the eigenvalues λi from large to small. The dominate and secondary proper orthogonal decomposition modes under horn ice condition were displayed, which could be illustrated as fluctuations near recirculation zone, and large-scale vortex shedding/reattaching motion, respectively. The proper orthogonal decomposition modal characteristics for ridge ice showed that vortex scales varied from large to small. The trajectory of large-scale vortex reattaching and co-rotating exist simultaneously with the pressure peak and recover, which also verified the association of proper orthogonal decomposition modes with different scales of vortices. Future works would be presented on demonstration of the complex structures and the dynamic features in such flow.

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Section: Numerical and Analytical Methodologymentioning

confidence: 99%

Study on vortex shedding mode on the wake of horn/ridge ice contamination under high-Reynolds conditions

Zhang

Liu

et al. 2019

Proceedings of the Institution of Mechanical Engineers, Part G:

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“…Одним из примеров современного уровня моделирования можно привести работу [168], в которой авторы объединяют высокоточные численные схемы, улучшенную модель турбулентности (DDES)(SA) и AMR подход адаптации сеток характеристикам течения. Проводится численное моделирования с высоким пространственным разрешением вихревых неустойчивых потоков с отрывным течением в задачах обтекания цилиндра потоком с высоким числом Рейнольдса и двухлопастного винта вертолета.…”

Section: методы повышения точности расчётов на основе динамически адаптируемых сетокunclassified

Современные Методы Математического Моделирования Развития Гидродинамических Неустойчивостей И Турбулентного Перемешивания

Тишкин¹,

Гасилов²,

Змитренко³

et al. 2020

Матем. моделирование

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Изучение развития возмущений под действием различных гидродинамических неустойчивостей, а также переход к развитому перемешиванию и турбулентности, уже на протяжении многих десятилетий представляет значительный интерес. В первую очередь это связано с важностью этих процессов для различных областей науки и техники. Кроме того, следует отметить, что до сих пор не получено окончательных результатов, касающихся, например, характеристик турбулентных течений. Всe это стимулирует большой интерес к данной тематике как в плане физической теории, так и в плане развития новых подходов к математическому моделированию соответствующих задач. Возможности современной вычислительной техники позволяют проводить численные эксперименты как в двумерных, так и в трeхмерных постановках, анализировать особенности предлагаемых новых численных методов. В настоящее время на практике применяется огромное количество таких методов со многими их модификациями. Данный обзор посвящен наиболее перспективным, по мнению авторов, из них.

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“…The Wall-Distance method [ 12 , 13 ] reduces the number of donor cells to be searched, thus reducing the amount of computation. When the number of Grid nodes exceeds 10 million, parallel computing method [ 14 , 15 , 16 ] should be adopted for Overset Grid Assembly to improve computing efficiency. The alternating digital tree (ADT) algorithm [ 17 , 18 ] applied to the adaptive Cartesian grid can effectively reduce the computation cost of OGA, because of its efficient data query structure.…”

Section: Introductionmentioning

confidence: 99%

Local Inverse Mapping Implicit Hole-Cutting Method for Structured Cartesian Overset Grid Assembly

Wang

Wu²,

et al. 2023

Entropy

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An automatic hole-cutting method is proposed to search donor cells between a structured Cartesian mesh and an overlapping body-fitted mesh. The main flow is simulated on the structured Cartesian mesh and the viscous flow near the solid boundary is simulated on the body-fitted mesh. Through the spatial interpolation of flux, the surface boundary information on the body-fitted mesh is transferred to the Cartesian mesh nodes near the surface. Cartesian mesh box near a body-fitted mesh cell is selected as a local inverse map. The Cartesian nodes located inside the donor cells are marked by the relative coordinate transformation, so that all Cartesian nodes can be classified and the hole boundaries are implicitly cut. This hole-cutting process for overset grid assembly is called Local Inverse Mapping (LIM) method. In the LIM method, spatial interpolation of flux is carried out synchronously with the marking of Cartesian nodes. The LIM method is combined with the in-house finite-difference solver to simulate the unsteady flow field of moving bodies. The numerical results show that the LIM method can accurately mark the Cartesian hole boundary nodes, the search efficiency of donor cells is high, and the result of spatial interpolation is accurate. The calculation time of overset grid assembly (OGA) can be less than 3% of the total simulation time.

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High-resolution multi-code implementation of unsteady Navier–Stokes flow solver based on paralleled overset adaptive mesh refinement and high-order low-dissipation hybrid schemes

Cited by 13 publications

References 19 publications

Study on vortex shedding mode on the wake of horn/ridge ice contamination under high-Reynolds conditions

Study on vortex shedding mode on the wake of horn/ridge ice contamination under high-Reynolds conditions

Современные Методы Математического Моделирования Развития Гидродинамических Неустойчивостей И Турбулентного Перемешивания

Local Inverse Mapping Implicit Hole-Cutting Method for Structured Cartesian Overset Grid Assembly

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