The Effects of Grid Accuracy on Flow Simulations: A Numerical Assessment
| Autor: | Vahid Esfahanian, Kianoosh Yousefi, Majid Allahyari |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2020 |
| Předmět: |
Airfoil
Computer science lcsh:Thermodynamics 01 natural sciences Theodorsen transformation 010305 fluids & plasmas Computational science Physics::Fluid Dynamics Orthogonality Linearization lcsh:QC310.15-319 0103 physical sciences grid quality 0101 mathematics lcsh:QC120-168.85 compact scheme Fluid Flow and Transfer Processes Computer simulation Mechanical Engineering grid accuracy Condensed Matter Physics Grid NACA airfoil 010101 applied mathematics Flow (mathematics) Mesh generation lcsh:Descriptive and experimental mechanics |
| Zdroj: | Fluids Volume 5 Issue 3 Fluids, Vol 5, Iss 110, p 110 (2020) |
| ISSN: | 2311-5521 |
| DOI: | 10.3390/fluids5030110 |
| Popis: | High-quality, accurate grid generation is a critical challenge in the computational simulation of fluid flows around complex geometries. In particular, the accuracy of the grids is an effective factor in order to achieve a successful numerical simulation. In the current study, we present a series of systematic numerical simulations for fluid flows around a NACA 0012 airfoil using different computational grid generation techniques, including the standard second-order, fourth-order compact, and Theodorsen transformation approaches, to assess the effects of grid accuracy on the flow solutions. The flow solvers are based on the second- and fourth-order schemes for spatial discretizations and Beam-Warming linearization method for time advancement. The obtained grids, as well as the metrics and the corresponding numerical flow solution for each grid generation technique, are compared and studied in detail. It is demonstrated that the quality and orthogonality of the grids is improved by using the fourth-order compact scheme. Moreover, the numerical assessment showed that the accuracy and the quality of the grids directly influence the numerical flow solutions. Finally, the higher-order accurate flow solvers are found to be more sensitive to the accuracy of the generated grid. |
| Databáze: | OpenAIRE |
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