Development of an implicit high-order flux reconstruction solver for the Langtry-Menter Laminar-Turbulent Transition RANS model

Vandenhoeck, Ray; Lani, Andrea; Steelant, Johan

doi:10.1016/j.cpc.2022.108408

Cited by 4 publications

(2 citation statements)

References 58 publications

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“…In the future, it will be also adjusted to a multifluid formulation, which is especially important for recreating physical aspects of the lower solar atmosphere that is only partially ionized, with a transition region and the chromosphere taken into account in our model. Its numerical accuracy can be further improved by adaptive mesh refinement (Ben Ameur & Lani 2021; Ben Ameur et al 2022) and application of high-order flux reconstruction methods (Vandenhoeck & Lani 2019;Vandenhoeck et al 2022), both of which are currently in development. On top of that a whitelight reconstruction algorithm will be used for even better comparison with observations, and coupling with EUHFORIA 2.0 space weather forecasting will be present in great detail for the first time.…”

Section: Discussionmentioning

confidence: 99%

COCONUT, a Novel Fast-converging MHD Model for Solar Corona Simulations. III. Impact of the Preprocessing of the Magnetic Map on the Modeling of the Solar Cycle Activity and Comparison with Observations

Kuźma

Brchnelova

Perri

et al. 2023

ApJ

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We developed a novel global coronal COCONUT (Coolfluid Corona Unstructured) model based on the COOLFluiD code. The steady-state model is predetermined by magnetograms set as boundary conditions, while inside the numerical domain the corona is described by MHD equations. This set of equations is solved with the use of an implicit solver on unstructured grids. Here we present numerically obtained results for two extremes of the solar activity cycle represented by CR 2161 and CR 2219 for solar maximum and minimum, respectively. We discuss the impact of reconstruction level on representative solar corona solutions and thus also the impact of small magnetic structures on the overall structure of the solar wind. Moreover, both cases correspond to particular solar eclipses, namely those in 2015 March and 2019 July, to allow us the direct comparison of simulations with observed coronal features. We use a validation scheme proposed by Wagner et al. (from less to more sophisticated methods, i.e., visual classification, feature matching, streamer direction and width, brute force matching, topology classification). The detailed comparison with observations reveals that our model recreates relevant features such as the position, direction, and shape of the streamers (by comparison with white-light images) and the coronal holes (by comparison with extreme ultraviolet images) for both cases of minimum and maximum solar activity. We conclude that an unprecedented combination of accuracy, computational speed and robustness even in the case of maximum activity is accomplished at this stage, with possible further improvements in a foreseeable perspective.

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Section: Discussionmentioning

confidence: 99%

COCONUT, a Novel Fast-converging MHD Model for Solar Corona Simulations. III. Impact of the Preprocessing of the Magnetic Map on the Modeling of the Solar Cycle Activity and Comparison with Observations

Kuźma

Brchnelova

Perri

et al. 2023

ApJ

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“…In order to reduce the influence of the number of grids on the calculation results, a grid independence verification was performed on the model. 43 A natural wind velocity of 1.5 m/s and a wind direction of northwest were selected to calculate the wind velocity at the measuring points within the open-pit mine and determine the error. Figure 3 a illustrates the wind velocity errors corresponding to different mesh resolutions, with decreasing errors from Mesh1 to Mesh2 to Mesh3.…”

Section: Methods and Modelsmentioning

confidence: 99%

Influence of Recirculation Flow on the Dispersion Pattern of Blasting Dust in Deep Open-Pit Mines

Chen,

Du,

Wang

et al. 2023

ACS Omega

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The recirculation within a deep open-pit mine is a significant factor contributing to the deterioration of the atmospheric environment. However, the underlying mechanisms of how recirculation influences the dispersion pattern of dust clouds within the deep open-pit mine have not been clearly elucidated. In this research, the dispersion patterns of blast dust clouds were investigated in a deep open-pit mine located in northern China. This research initially conducted a similar experiment to verify the existence of recirculation flow in the experimental mine, which can cause dust particles to aggregate toward the upwind slope. In response to the dust pollution issue in deep open-pit mine blasting operations, this study conducted a numerical simulation analysis based on on-site measurement data to investigate the effects of varying natural wind velocity, natural wind direction, and blast location on the diffusion pattern of blasting dust. The results indicate that natural wind velocity (v), natural wind direction (α), and blast location (d) affect the distance between the blast location and the recirculation center point (D recir), subsequently influencing the diffusion pattern of blasting dust. The recirculation flow effect influences the diffusion of dust toward the upwind slope under smaller D recir values, leading to widespread and long-term pollution within the mine. Under larger D recir values, dust diffuses toward the downwind slope with the straight flow of wind, resulting in less pollution within the mine. Through orthogonal experiments, the equation D recir = −120.61v 2 + 237.27v + 0.82d – 0.07α2 + 6.75α + 151.08 was established in this deep open-pit mine, which provides a basis for predicting the diffusion pattern of blasting dust and control strategy in this deep open-pit mine.

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Eilmer: An open-source multi-physics hypersonic flow solver

Gibbons

Damm

Jacobs

et al. 2023

Computer Physics Communications

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Development of an implicit high-order flux reconstruction solver for the Langtry-Menter Laminar-Turbulent Transition RANS model

Cited by 4 publications

References 58 publications

COCONUT, a Novel Fast-converging MHD Model for Solar Corona Simulations. III. Impact of the Preprocessing of the Magnetic Map on the Modeling of the Solar Cycle Activity and Comparison with Observations

COCONUT, a Novel Fast-converging MHD Model for Solar Corona Simulations. III. Impact of the Preprocessing of the Magnetic Map on the Modeling of the Solar Cycle Activity and Comparison with Observations

Influence of Recirculation Flow on the Dispersion Pattern of Blasting Dust in Deep Open-Pit Mines

Eilmer: An open-source multi-physics hypersonic flow solver

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