The Research On Application And Improvement Of SIMPLE Arithmetic Applied To Tidal Current Calculation

On the basis of carefully inspecting on the research about numerical simulation of water environment, this thesis adopted Control Volume Formulation and the Format of Involution Law which has high difference precision to disperse 2-D mathematics model of current; and on the basis of classical SIMPLE algorithm, by making a summary of the research on SIMPLE algorithm from former investigator, this thesis try to selected scientific, effective and laconic method to gain improvement on this algorithm. For the improved algorithm, using the result from typical quadrate cavity current area to compare the constringency speed of SIMPLE with the constringency speed of the improved algorithm. By comparing, finding that the improved SIMPLE algorithm has better constringency speed. On the basis of above, using the program of C++ to simulate the movement of tidal current in the maritime space of Yang Xi. By comparing the result of calculation with the result of observation, finding that the results are preferable; at the same time, the thesis has used the actual process of calculation in the maritime space of Yang Xi to prove the validity of improved algorithm.By comparing the result with the result from quadrate cavity fluid area and the result of maritime space of Yang Xi, finding that the method which has been used to improve the SIMPLE algorithm in this thesis has preferable effect; the result of numerical simulation in the maritime space of Yang Xi can be used reliably for protecting and programming of the maritime space of Yang Xi, and for the ulterior research on the law of mixing of the pollutant; the program used in this article is also can be used for other sea areas and rivers which have more longer width than deepness.