Sb. Pope, COMPUTATIONALLY EFFICIENT IMPLEMENTATION OF COMBUSTION CHEMISTRY USING IN-SITU ADAPTIVE TABULATION, COMBUSTION THEORY AND MODELLING, 1(1), 1997, pp. 41-63
Citations number
16
Categorie Soggetti
Mathematics,Mathematics,Thermodynamics,"Energy & Fuels","Engineering, Chemical
A computational technique is described and demonstrated that can decre
ase by three orders of magnitude the computer time required to treat d
etailed chemistry in reactive flow calculations. The method is based o
n the in situ adaptive tabulation (ISAT) of the accessed region of the
composition space-the adaptation being to control the tabulation erro
rs. Test calculations are performed for non-premixed methane-air combu
stion in a statistically-homogeneous turbulent reactor, using a kineti
c mechanism with 16 species and 41 reactions. The results show excelle
nt control of the tabulation errors with respect to a specified error
tolerance; and a speed-up factor of about 1000 is obtained compared to
the direct approach of numerically integrating the reaction equations
. In the context of PDF methods, the ISAT technique makes feasible the
use of detailed kinetic mechanisms in calculations of turbulent combu
stion. The technique can also be used with reduced mechanisms, and in
other approaches for calculating reactive flows (e.g. finite differenc
e methods).