Adaptive unstructured finite element method for two-dimensional detonation simulations |
| |
Authors: | E Loth S Sivier J Baum |
| |
Institution: | (1) Department of Aeronautical and Astronautical Engineering, University of Illinois at Urbana-Champaign, Urbana, IL 61801, USA E-mail: e-loth@uiuc.edu , US |
| |
Abstract: | A non-equilibrium reacting flow methodology has been added to a conservative, monotonic, compressible flow solver to allow
numerical simulations of gas detonations. This flow solver incorporates unstructured dynamically adaptive meshes with the
Finite Element Method – Flux Corrected Transport (FEM-FCT) scheme, which has shown excellent predictive capability of various
non-reacting compressible flows. A two-step induction parameter model was used to model the combustion of the gas phase coupled
with an energy release equation which was simulated with a point implicit finite element scheme. This combustion model was
then applied to a two-dimensional detonation test case of a hypothetical fuel:oxygen mixture. The detonation simulation yielded two transverse waves which continued to propagate. This feature and
the detonation shock speed mean and fluctuations were found to be grid-independent based on a resolution of about twenty elements
within the average induction length. The resolution was efficiently achieved with the unstructured dynamically adaptive finite
elements, which were three orders of magnitude less in number then required for uniform discretization.
Received 26 August 1996 / Accepted 31 March 1997 |
| |
Keywords: | : Finite elements Detonation Adaptive unstructured meshes |
本文献已被 SpringerLink 等数据库收录! |
|