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NUMERICAL ANALYSIS OF UNSTEADY VISCOUS FLOWS USING A FAST GRID DEFORMATION TECHNIQUE ON HYBRID UNSTRUCTURED MESHES  

Lee, H.D. (한국과학기술원 대학원 항공우주공학과)
Jung, M.S. (한국과학기술원 대학원 항공우주공학과)
Kwon, O.J. (한국과학기술원 항공우주공학과)
Publication Information
Journal of computational fluids engineering / v.14, no.3, 2009 , pp. 33-48 More about this Journal
Abstract
In the present study, a fast grid deformation technique has been incorporated into the unsteady compressible and incompressible viscous flow solvers on unstructured hybrid meshes. An algebraic method based on the basis decomposition of normal edge vector was used for the deformation of viscous elements, and a ball-vertex spring analogy was adopted for inviscid elements among several spring analogy methods due to its robustness. The present method was validated by comparing the results obtained from the grid deformation and the rigid motion of entire grids. Fish swimming motion of an NACA0012 airfoil and flapping wing motion of a generic fighter were also simulated to demonstrate the robustness of the present grid deformation technique.
Keywords
Grid Deformation Technique; Spring Analogy; Unstructured Hybrid Meshes; Unsteady Flow; Fish Swimming Motion; Flapping Wing;
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Times Cited By KSCI : 5  (Citation Analysis)
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