Show/Hide Menu
Hide/Show Apps
Logout
Türkçe
Türkçe
Search
Search
Login
Login
OpenMETU
OpenMETU
About
About
Open Science Policy
Open Science Policy
Communities & Collections
Communities & Collections
Help
Help
Frequently Asked Questions
Frequently Asked Questions
Guides
Guides
Thesis submission
Thesis submission
MS without thesis term project submission
MS without thesis term project submission
Publication submission with DOI
Publication submission with DOI
Publication submission
Publication submission
Supporting Information
Supporting Information
General Information
General Information
Copyright, Embargo and License
Copyright, Embargo and License
Contact us
Contact us
A 2-D unsteady Navier-Stokes solution method with overlapping/overset moving grids
Date
1996-01-01
Author
Tuncer, İsmail Hakkı
Metadata
Show full item record
Item Usage Stats
199
views
0
downloads
Cite This
A simple, robust numerical algorithm to localize intergrid boundary points and to interpolate unsteady solution variables across 2-D, overset/overlapping, structured computational grids is presented. Overset/ overlapping grids are allowed to move in time relative to each other. The intergrid boundary points are localized in terms of three grid points on the donor grid by a directional search algorithm. The final parameters of the search algorithm give the interpolation weights at the interpolation point. The method is independent of numerical solution algorithms and it may easily be implemented on any 2-D, single block flow solver to make it a multi-block, zonal solver with arbitrarily overset/ overlapping computational grids. In the present study, numerical results are presented for steady and unsteady, viscous flow solutions over a flapping/stationary airfoil combination in tandem and over a single airfoil undergoing a sinusoidal flapping motion. The computational domains are discretized with overlapping and/or overset subgrids, which move in time relative to each other. The intergrid boundary point localization on the donor grid and the interpolation of flow variables are found to be accurate and robust. Computed flow variables are continuous across the grid boundaries and an excellent agreement is obtained against the single grid solutions.
Subject Keywords
Aerospace Engineering
,
Airfoils
,
Grid Computing
,
Interpolation
,
Learning Algorithms
,
Navier Stokes Equations
,
Numerical Methods
URI
https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=84962140662&origin=inward
https://hdl.handle.net/11511/84753
Conference Name
34th Aerospace Sciences Meeting and Exhibit, 1996 (15 - 18 Ocak 1996)
Collections
Department of Aerospace Engineering, Conference / Seminar
Suggestions
OpenMETU
Core
A 2-0 navier-stokes solution method with overset moving grids
Tuncer, İsmail Hakkı (1996-01-01)
A simple, robust numerical algorithm to localize moving boundary points and to interpolate uniteady solution variables across 2-D, arbitrarily overset computational grids is presented. Overset grids are allowed to move in time relative to each other. The intergrid boundary points are localized in terms of three grid points on the donor grid by a directional search algorithm. The parameters of the search algorithm give the interpolation weights at the localized boundary point. The method is independent of nu...
Two-dimensional unsteady Navier-Stokes solution method with moving overset grids
Tuncer, İsmail Hakkı (American Institute of Aeronautics and Astronautics (AIAA), 1997-03-01)
A simple numerical algorithm to localize intergrid boundary points and to interpolate unsteady solution variables across two-dimensional, structured overset grids is presented. Overset grids are allowed to move in time relative to each other. Intergrid boundary points are localized in a triangular stencil on the donor grid by a directional search algorithm. The final parameters of the search algorithm give the interpolation weights at the intergrid boundary point. Numerical results are presented for steady ...
A linear approximation for training Recurrent Random Neural Networks
Halıcı, Uğur (1998-01-01)
In this paper, a linear approximation for Gelenbe's Learning Algorithm developed for training Recurrent Random Neural Networks (RRNN) is proposed. Gelenbe's learning algorithm uses gradient descent of a quadratic error function in which the main computational effort is for obtaining the inverse of an n-by-n matrix. In this paper, the inverse of this matrix is approximated with a linear term and the efficiency of the approximated algorithm is examined when RRNN is trained as autoassociative memory.
2-D Navier-Stokes solution method with overset moving grids
Tuncer, İsmail Hakkı (1996-01-01)
A simple, robust numerical algorithm to localize moving boundary points and to interpolate unsteady solution variables across 2-D, arbitrarily overset computational grids is presented. Overset grids are allowed to move in time relative to each other. The intergrid boundary points are localized in terms of three grid points on the donor grid by a directional search algorithm. The parameters of the search algorithm give the interpolation weights at the localized boundary point. The method is independent of nu...
Analysis of a projection-based variational multiscale method for a linearly extrapolated BDF2 time discretization of the Navier-Stokes equations
Vargün, Duygu; Kaya Merdan, Songül; Department of Mathematics (2018)
This thesis studies a projection-based variational multiscale (VMS) method based on a linearly extrapolated second order backward difference formula (BDF2) to simulate the incompressible time-dependent Navier-Stokes equations (NSE). The method concerns adding stabilization based on projection acting only on the small scales. To give a basic notion of the projection-based VMS method, a three-scale VMS method is explained. Also, the principles of the projection-based VMS stabilization are provided. By using t...
Citation Formats
IEEE
ACM
APA
CHICAGO
MLA
BibTeX
İ. H. Tuncer, “A 2-D unsteady Navier-Stokes solution method with overlapping/overset moving grids,” presented at the 34th Aerospace Sciences Meeting and Exhibit, 1996 (15 - 18 Ocak 1996), Nevada, Amerika Birleşik Devletleri, 1996, Accessed: 00, 2021. [Online]. Available: https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=84962140662&origin=inward.