A high-order public domain code for direct numerical simulations of turbulent combustion

JOURNAL OF COMPUTATIONAL PHYSICS

卷:230

Article

Babkovskaia, N.¹  Haugen, N. E. L.²  Brandenburg, A.^3,4 

[1] Univ Helsinki, Div Geophys & Astron, FI-00014 Helsinki, Finland

[2] SINTEF Energy Res, N-7465 Trondheim, Norway

[3] AlbaNova Univ Ctr, NORDITA, SE-10691 Stockholm, Sweden

[4] Stockholm Univ, Dept Astron, SE-10691 Stockholm, Sweden

关键词: Public domain DNS code;    Turbulent combustion;   

DOI  :  10.1016/j.jcp.2010.08.028

来源: Elsevier

【 摘 要 】

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.

【 授权许可】

Free