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Tham khảo tài liệu 'hydrodynamics optimizing methods and tools part 4', kỹ thuật - công nghệ, cơ khí - chế tạo máy phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả | 78 Hydrodynamics - Optimizing Methods and Tools a rv rc Ts Ts Ts b Ttot Ttot Ttot b 1 16.36 1.00 18.23 1 1.1 14.75 0.90 16.65 0.91 1.2 12.43 0.76 14.36 0.79 1.3 11.57 0.71 13.48 0.74 1.4 13.74 0.84 15.63 0.86 1.5 15.23 0.93 17.17 0.94 Fig. 4.a a rv rc Ts Ts Ts b Ttot Ttot Ttot b 1 9.45 0.58 11.27 0.62 1.1 8.23 0.50 10.07 0.55 1.2 7.65 0.47 9.48 0.52 1.3 6.84 0.42 8.69 0.48 1.4 7.85 0.48 9.61 0.53 1.5 8.98 0.55 10.83 0.59 Fig. 4.b a rv rc Ts Ts Ts b Ttot Ttot Ttot b 1 4.78 0.29 6.57 0.36 1.1 4.38 0.27 6.23 0.34 1.2 3.66 0.22 5.5 0.30 1.3 3.19 0.19 5.03 0.28 1.4 3.86 0.24 5.71 0.31 1.5 4.55 0.28 6.39 0.35 Fig. 4.c a rv rc Ts Ts Ts b Ttot Ttot Ttot b 1 3.11 0.19 4.94 0.27 1.1 2.99 0.18 4.81 0.26 1.2 2.78 0.17 4.62 0.25 1.3 2.64 0.16 4.47 0.25 1.4 2.85 0.17 4.68 0.26 1.5 3.05 0.19 4.89 0.27 Fig. 4.d Relative partial and total computational time Relative partial and total computational time Domain partitioned into vertical slices Relative partial and total computational time Domain partitioned in cells whose dimensions are a rv rc Relative partial and total computational time Domain partitioned in cells whose dimensions are a rv rc Fig. 4.a. refers to the case with no fixed cell structure. Here obviously the Verlet list procedure is highly beneficial even though it appears that the size of the list must be carefully chosen in order to fully exploit it effects. Figs. 4.b to 4.d show different computational times depending on the cell size. Figure 5 gives a better insight of the results showing the non-dimensional running cost trend Ts Ts b. As can be seen minimum is achieved for a certain grid size. Simulating Flows with SPH Recent Developments and Applications 79 Comparison between relative computational times Ts Ts b Dx cell 0 10m Dy cell 0 10m Dx cell 0 25m Dy cell 0 25m Dx cell 0 50m Dy cell 0 50m Dx cell 7.50m Dy cell 7 08m no grid a rv rc Fig. 5. Comparison among different cell sizes. It appears that while both the linked cell list and the Verlet list do relieve .