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2.5 -dimensional particle simulation software cold chamber parallel algorithm

Author: JiangZuo
Tutor: LiuShengGang
School: University of Electronic Science and Technology
Course: Electronic Science and Technology
Keywords: Parallel algorithms Finite Difference Time Domain When partial algorithm Particle simulation
CLC: TP391.9
Type: Master's thesis
Year: 2008
Downloads: 35
Quote: 1
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Abstract


Particle simulation with the dimension was the power of two (index) changes in particle simulation, always try analog processing into a dimension as low as simulation problems. If the particles are exactly the same in either direction of the movement (including the self-consistent field), it is not necessary to the motion of charged particles on the direction of double counting, just put it as a series of solid columns in this direction. Thus, as long as consider the movement of these columns in the other two directions, and significant savings in computation time, the problem became a two-dimensional movement. For this purpose, the paper mainly studies the cold chamber simulation CHIPIC software version of the 2.5-dimensional parallel algorithm. The papers First, cold chamber parallel algorithm simulation research CHIPIC2.5-dimensional version of the Cartesian coordinate system. Parallel algorithm design ideas under the guidance of \Secondly designed and implemented parallel algorithm for the two-dimensional cylindrical coordinates and polar coordinates software. Focus on the different characteristics of the column and rectangular coordinates, cylindrical coordinates and polar coordinates, boundary treatment technology. FDTD algorithm for each grid point electric field values ??or magnetic field values ??calculated only need near magnetic field values ??of the grid points or electric field values, it is still using the \and analyze the time complexity of the algorithm, the speedup and space complexity. Finally, two-dimensional coordinate system when partial FDTD parallel algorithm. When partial FDTD algorithm is important CHIPIC software module, It is a high-frequency noise filter the FDTD algorithm, which enables high-frequency noise to minimize the impact on the calculation results. In a big loop iteration process, it is time-stepping mode, each time step that contains a number of small loops for filtering noise. The time partial FDTD algorithm calculated amount much larger than the the center differential FDTD algorithm, at the expense of computing time to exchange the filter characteristics. The introduction of parallel computing partial algorithm urgent task of great significance, the effect is obvious. Designed on the basis of the central difference algorithm deviation divided by the time (t 1/2 △ t) the magnetic field values ??in the center differential FDTD algorithm to calculate the moment of the electric field (t △ t) in partial FDTD algorithm , considered by (t 3/2 * △ t), (t 1/2 * △ t) and (t-1/2 △ t) and three times in the magnetic field values ??to be calculated, and according to the magnetic field of the three moments proportion set the the factor α when partial 1 , α 2 , α 3 . According to the analysis of a the derivation for partial FDTD unified parallel iterative relationship, the analysis of the stability conditions, same parallel design idea of ??\

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CLC: > Industrial Technology > Automation technology,computer technology > Computing technology,computer technology > Computer applications > Information processing (information processing) > Computer simulation
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