See the published version of this article at Advances in Aerodynamics.
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Research
Hybrid Grid Generation for Viscous Flow Simulations in Complex Geometries
Jianjun Chen
Zhejiang University
Corresponding Author
ORCiD: https://orcid.org/0000-0002-0318-0997
License:
This work is licensed under a CC BY 4.0 License. Read Full License
View the published version at Advances in Aerodynamics.
In this paper, we present a hybrid grid generation approach for viscous flow simulations by marching a surface triangulation on viscous walls along certain directions. Focuses are on the computing strategies used to determine the marching directions and distances since these strategies determine the quality of the resulting elements and the reliability of the meshing procedure to a large extent. With respect to marching direction, three strategies featured with different levels of efficiencies and robustness performance are combined to compute the initial normals at front nodes to balance the trade-off between efficiency and robustness. A novel weighted strategy is used in the normal smoothing scheme, which evidently reduce the possibility of early stop of front generation at complex corners. With respect to marching distances, the distance settings at concave and/or convex corners are locally adjusted to smooth the front shape at first; a further adjustment is then conducted for front nodes in the neighbourhood of gaps between opposite viscous boundaries. These efforts, plus other special treatments such as multi-normal generation and fast detection of local/global intersection, as a whole enable the setup of a hybrid mesher that could generate qualitied viscous grids for geometries with industry-level complexities.
Keywords
mesh generation, hybrid mesh, mesh quality, viscous flow
Due to technical limitations, full-text HTML conversion of this manuscript could not be completed. However, the manuscript can be downloaded and accessed as a PDF.
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CURRENT STATUS: Published
Version 1
Posted 29 May, 2020
Published
On 30 Jul, 2020
No community comments so far
Editorial decision: Accept
On 29 May, 2020
Review #2 received
Received 27 May, 2020
Review #1 received
Received 27 May, 2020
Reviewers invited
Invitations sent on 26 May, 2020
Reviewer #1 agreed
On 26 May, 2020
Reviewer #2 agreed
On 26 May, 2020
First submitted
On 25 May, 2020
Editor assigned
On 25 May, 2020
Submission checks complete
On 24 May, 2020
Editor invited
On 24 May, 2020
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Subject Areas
Aeronautics and Astronautics
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This preprint is under consideration at Advances in Aerodynamics. A preprint is a preliminary version of a manuscript that has not completed peer review at a journal. Research Square does not conduct peer review prior to posting preprints. The posting of a preprint on this server should not be interpreted as an endorsement of its validity or suitability for dissemination as established information or for guiding clinical practice.
Learn more about In Review
Research
Hybrid Grid Generation for Viscous Flow Simulations in Complex Geometries
Jianjun Chen
Zhejiang University
Corresponding Author
ORCiD: https://orcid.org/0000-0002-0318-0997
Badges
Prescreen
This manuscript passed our Prescreen assessment
Complete author information
Appropriate declaration statements
Potential risks to human health
Prescreen
Peer Review Timeline
CURRENT STATUS: Published
Version 1
Posted 29 May, 2020
Published
On 30 Jul, 2020
No community comments so far
Editorial decision: Accept
On 29 May, 2020
Review #2 received
Received 27 May, 2020
Review #1 received
Received 27 May, 2020
Reviewers invited
Invitations sent on 26 May, 2020
Reviewer #1 agreed
On 26 May, 2020
Reviewer #2 agreed
On 26 May, 2020
First submitted
On 25 May, 2020
Editor assigned
On 25 May, 2020
Submission checks complete
On 24 May, 2020
Editor invited
On 24 May, 2020
Metrics
Comments: 0
PDF Downloads: ...
HTML Views: ...
Subject Areas
Aeronautics and Astronautics
License:
This work is licensed under a CC BY 4.0 License. Read Full License
View the published version at Advances in Aerodynamics.
In this paper, we present a hybrid grid generation approach for viscous flow simulations by marching a surface triangulation on viscous walls along certain directions. Focuses are on the computing strategies used to determine the marching directions and distances since these strategies determine the quality of the resulting elements and the reliability of the meshing procedure to a large extent. With respect to marching direction, three strategies featured with different levels of efficiencies and robustness performance are combined to compute the initial normals at front nodes to balance the trade-off between efficiency and robustness. A novel weighted strategy is used in the normal smoothing scheme, which evidently reduce the possibility of early stop of front generation at complex corners. With respect to marching distances, the distance settings at concave and/or convex corners are locally adjusted to smooth the front shape at first; a further adjustment is then conducted for front nodes in the neighbourhood of gaps between opposite viscous boundaries. These efforts, plus other special treatments such as multi-normal generation and fast detection of local/global intersection, as a whole enable the setup of a hybrid mesher that could generate qualitied viscous grids for geometries with industry-level complexities.
Due to technical limitations, full-text HTML conversion of this manuscript could not be completed. However, the manuscript can be downloaded and accessed as a PDF.