Journal
JOURNAL OF COMPUTATIONAL PHYSICS
Volume 230, Issue 1, Pages 1-12Publisher
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.jcp.2010.08.028
Keywords
Public domain DNS code; Turbulent combustion
Funding
- Academy of Finland
- Magnus Ehrnrooth Foundation
- European Community [211971]
- European Research Council [227952]
- Swedish Research Council [621-2007-4064]
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A high-order scheme for direct numerical simulations of turbulent combustion is discussed. Its implementation in the massively parallel and publicly available PENCIL CODE is validated with the focus on hydrogen combustion. This is the first open source DNS code with detailed chemistry available. An attempt has been made to present, for the first time, the full set of evolution and auxiliary equations required for a complete description of single phase non-isothermal fluid dynamics with detailed chemical reactions. Ignition delay times (0D) and laminar flame velocities (1D) are calculated and compared with results from the commercially available Chemkin code. The scheme is verified to be fifth order in space. Upon doubling the resolution, a 32-fold increase in the accuracy of the flame front is demonstrated. Finally, also turbulent and spherical flame front velocities are calculated and the implementation of the non-reflecting so-called Navier-Stokes Characteristic Boundary Condition is validated in all three directions. (C) 2010 Elsevier Inc. All rights reserved.
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