354
11. Efficiency and Accuracy Improvement
Fig. 11.9. Local grid refinement for the calculation of flow in a combustor: the
coarsest grid (top), second refinement (middle) and final grid (bottom; fifth level);
from Muzaferija and Gosman, 1997
unrefined part of the grid is not re-computed (see Berger and Oliger, 1984).
This feature makes the method inappropriate for elliptic problems in which a
change in conditions in any region may affect the solution everywhere. Methods that allow the influence of the refined grid solution to spread over the
whole domain are called active methods. Such methods have been developed
by Caruso et al. (1985) and Muzaferija (1994), among others.
One kind of active method (e.g. Caruso et al., 1985) proceeds exactly
as the passive method with the important difference that the procedure is
not complete when the fine grid solution has been computed. Rather, it is
11. Efficiency and Accuracy Improvement
Fig. 11.9. Local grid refinement for the calculation of flow in a combustor: the
coarsest grid (top), second refinement (middle) and final grid (bottom; fifth level);
from Muzaferija and Gosman, 1997
unrefined part of the grid is not re-computed (see Berger and Oliger, 1984).
This feature makes the method inappropriate for elliptic problems in which a
change in conditions in any region may affect the solution everywhere. Methods that allow the influence of the refined grid solution to spread over the
whole domain are called active methods. Such methods have been developed
by Caruso et al. (1985) and Muzaferija (1994), among others.
One kind of active method (e.g. Caruso et al., 1985) proceeds exactly
as the passive method with the important difference that the procedure is
not complete when the fine grid solution has been computed. Rather, it is