A Navier-Stokes Solver for Compressible Turbulent Flows on Quadtree and Octree Based Cartesian Grids

Kara E., KUTLAR A. İ., AKSEL M. H.

JOURNAL OF APPLIED FLUID MECHANICS, cilt.12, sa.2, ss.539-549, 2019 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 12 Sayı: 2
  • Basım Tarihi: 2019
  • Doi Numarası: 10.29252/jafm.12.02.29156
  • Dergi Adı: JOURNAL OF APPLIED FLUID MECHANICS
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Sayfa Sayıları: ss.539-549
  • Anahtar Kelimeler: Cartesian grid generation, Finite volume solver, Turbulent flows, Object-oriented programming, RANS equations, Spalart-Allmaras (SA) turbulence model, BOUNDARY METHOD
  • Orta Doğu Teknik Üniversitesi Adresli: Evet

Özet

Cartesian grids represent a special extent in unstructured grid literature. They employ chiefly created algorithms to produce automatic meshing while simulating flows around complex geometries without considering shape of the bodies. In this article, firstly, it is intended to produce regionally developed Cartesian meshes for two dimensional and three dimensional, disordered geometries to provide solutions hierarchically. Secondly, accurate results for turbulent flows are developed by finite volume solver (GeULER-NaTURe) with both geometric and solution adaptations. As a result, a "hands-off" flow solver based on Cartesian grids as the preprocessor is performed using object-oriented programming Spalart-Allmaras turbulence model added Reynolds Averaged Navier Stokes equations are solved for the flows around airfoils and wings. The solutions are validated and verified by one two dimensional and one three dimensional turbulent flow common test cases in literature. Both case studies disclose the efficaciousness of the developed codes and qualify in convergence and accuracy.