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ENCIT 2020
18th Brazilian Congress of Thermal Sciences and Engineering
EFFECTS OF NUMERICAL PARAMETERS IN THE SIMULATION OF SUPERSONIC BLUNT BODY FLOWS
Submission Author:
Frederico Bolsoni Oliveira , SP
Co-Authors:
Frederico Bolsoni Oliveira, João Luiz F. Azevedo
Presenter: Frederico Bolsoni Oliveira
doi://10.26678/ABCM.ENCIT2020.CIT20-0300
Abstract
The effects induced by mesh geometry and numerical scheme on the solution of supersonic inviscid flows around a blunt body are analyzed, mainly focusing on the structure of the bow shock that commonly arises in such conditions. Four different schemes are considered: Beam and Warming implicit approximate factorization algorithm, the original Steger and Warming flux vector splitting algorithm, the van Leer approach on performing the flux vector splitting and Liou's AUSM+ scheme. Significant changes in the shock structure are observed, mainly due to special properties of the scheme in use and to the angle that exists between the mesh lines and the shock surface. Non-physical behavior is also seen to be prone to arise in such conditions.
Keywords
Computational Fluid Dynamics, Supersonic Flow, Blunt body, Bow Shock, Finite Differences
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