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潮流数值计算ADI方法的研究
江绍刚1
交通部第一航务工程局科学研究所
摘要:
依靠数值试验的方法,作者研究了有关用ADI方法模拟潮流场变化过程时的稳定性、收敛性和计算精度的问题。针对糙率、科氏力、初始水位、时间步长和水深对稳定性的影响,进行了大量的计算。结果表明:由公式求得的β作为计算结果的精度的判别参数是合理的,而β作为计算的稳定性的判别参数就不太适用了。
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基金项目:
STUDY ON ADI METHOD OF TIDAL NUMERICAL COMPUTATION
Abstract:
By means of numerical experiments, stability, convergence and accuracy of ADI method in the simulation process of the variation of tidal current field have been studied in this paper. A large number of computations have been made of effects of bottom roughness, coriolis force, initial water level, time step, and water depth on stability. Resultsindicated that β obtained from the equation can be reasonable regardedas a parameter of accuracy, but not as a parameter of stability.
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