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C1U1 - High fidelity simulation of a flow around three-dimensional NACA0012 airfoil with rounded wing tip

A flow around three-dimensional wing tip is a relatively complex, industrially relevant test case allowing to study a number of physical phenomena responsible for e.g. generation of the drag on the airplane. 

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Despite its environmental and economic importance, there is a lack of high-fidelity numerical data for high-Reynolds-number turbulent flows. This case is also a good platform for testing several different aspects of numerical modelling that are investigated within EXCELLERAT.

Description - engineer

This use case demonstrates the application of adaptive mesh refinement in Nek5000 to the flow with high Reynolds numbers in a relatively complex geometry. It is meant to show a whole simulation workflow starting with mesh generation, through performing simulation and ending with post-processing. Multiple simulation aspects are considered here, however, we focus mostly on solution accuracy and reliability controlling computation error during the simulation and looking at uncertainty quantification. The other key feature is in-situ data analysis, as it enables large-scale simulations.


Description - developer

Multiple aspects of numerical modelling can be tested and improved with this use case. As C1U1 provides relatively complex geometry the generation of a high-quality high-order hex-based mesh is a challenge. In the original setup, we used open-source meshes gmsh, but the use of commercial tools can give important advantages. The other key feature of C1U1 is a complex flow reach in a variety of flow features that can be analysed in multiple ways. This opens a field for the development of different methods, algorithms and implementation of in-situ data reduction, that potentially can combine Nek5000 with additional software. This use case for sufficiently high Reynolds numbers can also become relatively big, giving place to testing solver parallel efficiency and quality of load balancing.


This use case was developed within the EXCELLERAT P1 project phase.