Unsteady Compressible Flow Calculations with Least-Square Mesh-less Method
A dual-time implicit mesh-less method is presented for unsteady compressible flow calculations. Polynomial least-square (PLS) and Taylor series least-square (TLS) procedures are used to estimate the spatial derivatives at each node and their computational efficiencies are compared. Also, the effec...
| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
| Published: |
Isfahan University of Technology
2016-01-01
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| Series: | Journal of Applied Fluid Mechanics |
| Subjects: | |
| Online Access: | http://jafmonline.net/JournalArchive/download?file_ID=38978&issue_ID=224 |
| _version_ | 1818002365666557952 |
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| author | samad sattarzadeh Alireza Jahangirian mir yousef hashemi |
| author_facet | samad sattarzadeh Alireza Jahangirian mir yousef hashemi |
| author_sort | samad sattarzadeh |
| collection | DOAJ |
| description | A dual-time implicit mesh-less method is presented for unsteady compressible flow calculations. Polynomial
least-square (PLS) and Taylor series least-square (TLS) procedures are used to estimate the spatial derivatives
at each node and their computational efficiencies are compared. Also, the effect of the neighbor stencil
selection on the accuracy of the method is investigated. As a new approach, different neighboring stencils are
used for the highly stretched point distribution inside the boundary layer region and the inviscid isotropic
point distribution outside this area. The unsteady flows over stationary and moving objects at subsonic and
transonic flow conditions are solved. Results indicate the computational efficiency of the method in
comparison with the alternative approaches. The convergence histories of the flow solution show that the PLS
method is computationally faster than TLS method. In addition, the eight point neighboring stencil inside the
viscous region is more efficient than other choices. |
| first_indexed | 2024-04-14T03:45:52Z |
| format | Article |
| id | doaj.art-3478dc920fac470a881ea325ce5468d5 |
| institution | Directory Open Access Journal |
| issn | 1735-3572 |
| language | English |
| last_indexed | 2024-04-14T03:45:52Z |
| publishDate | 2016-01-01 |
| publisher | Isfahan University of Technology |
| record_format | Article |
| series | Journal of Applied Fluid Mechanics |
| spelling | doaj.art-3478dc920fac470a881ea325ce5468d52022-12-22T02:14:17ZengIsfahan University of TechnologyJournal of Applied Fluid Mechanics1735-35722016-01-0191233241.Unsteady Compressible Flow Calculations with Least-Square Mesh-less Methodsamad sattarzadeh0Alireza Jahangirian1mir yousef hashemi2Amirkabir University of TechnologyAmirkabir University of TechnologyAzarbaijan Shahid Madani UniversityA dual-time implicit mesh-less method is presented for unsteady compressible flow calculations. Polynomial least-square (PLS) and Taylor series least-square (TLS) procedures are used to estimate the spatial derivatives at each node and their computational efficiencies are compared. Also, the effect of the neighbor stencil selection on the accuracy of the method is investigated. As a new approach, different neighboring stencils are used for the highly stretched point distribution inside the boundary layer region and the inviscid isotropic point distribution outside this area. The unsteady flows over stationary and moving objects at subsonic and transonic flow conditions are solved. Results indicate the computational efficiency of the method in comparison with the alternative approaches. The convergence histories of the flow solution show that the PLS method is computationally faster than TLS method. In addition, the eight point neighboring stencil inside the viscous region is more efficient than other choices.http://jafmonline.net/JournalArchive/download?file_ID=38978&issue_ID=224Navier-Stokes equations; Unsteady compressible flow; Mesh less method; Moving boundary; Implicit method. |
| spellingShingle | samad sattarzadeh Alireza Jahangirian mir yousef hashemi Unsteady Compressible Flow Calculations with Least-Square Mesh-less Method Journal of Applied Fluid Mechanics Navier-Stokes equations; Unsteady compressible flow; Mesh less method; Moving boundary; Implicit method. |
| title | Unsteady Compressible Flow Calculations with Least-Square Mesh-less Method |
| title_full | Unsteady Compressible Flow Calculations with Least-Square Mesh-less Method |
| title_fullStr | Unsteady Compressible Flow Calculations with Least-Square Mesh-less Method |
| title_full_unstemmed | Unsteady Compressible Flow Calculations with Least-Square Mesh-less Method |
| title_short | Unsteady Compressible Flow Calculations with Least-Square Mesh-less Method |
| title_sort | unsteady compressible flow calculations with least square mesh less method |
| topic | Navier-Stokes equations; Unsteady compressible flow; Mesh less method; Moving boundary; Implicit method. |
| url | http://jafmonline.net/JournalArchive/download?file_ID=38978&issue_ID=224 |
| work_keys_str_mv | AT samadsattarzadeh unsteadycompressibleflowcalculationswithleastsquaremeshlessmethod AT alirezajahangirian unsteadycompressibleflowcalculationswithleastsquaremeshlessmethod AT miryousefhashemi unsteadycompressibleflowcalculationswithleastsquaremeshlessmethod |