Common Contracts
1 similar null contracts
PENTRANTM Code SystemDecember 17th, 2008
Ordinate Splitting Method. The Ordinate Splitting (OS) Technique is developed for solving problems with highly peaked angular flux and/or source. The idea is to introduce more directions at local regions; for this purpose we split a direction into a number of directions with equal weights. These directions are positioned symmetrically around the direction of interest and their weights are calculated by equally dividing the original weight among the new split directions and the direction of interest, as depicted in Fig. 2.5a. This technique because of its local refinement can be considered as a biasing approach. In PENTRAN, the solid angle associated with a specific ordinate is sub-divided into equal size sectors. The added directions are placed on the corners and flanking the original direction is at the center as shown in Fig. 2.5b. A proper selection of the sector surrounding the original direction is performed to avoid overlapping with other directions. The number of additional dire
