CAJ | 학술논문

基于非结构网格模拟河道复杂边界的研究域,应用算子分裂法剖分浅水方程,采用有限体积法离散,建立隐式格式的通量计算,构造一种模拟二维水流运动的隐式算法.该方法具有计算稳定的特点,并应用于长江南京段分汊河道的流场模拟,计算结果与实测结果吻合良好,验证了算法的可行性和有效性.
기우비결구망격모의하도복잡변계적연구역,응용산자분렬법부분천수방정,채용유한체적법리산,건립은식격식적통량계산,구조일충모의이유수류운동적은식산법.해방법구유계산은정적특점,병응용우장강남경단분차하도적류장모의,계산결과여실측결과문합량호,험증료산법적가행성화유효성.
Based on unstructured grid generation technique, finite volume method and fractional step algorithm, a numerical implicit model was developed for the solution to the system of shallow water equations at the computational geometry associated with complex boundaries. With the implicit scheme to obtain the fluxes between the neighboring units, this model is numerical stabile. And it was applied to simulate the water flow pattern of the braided channel with islands of the Lower Changjiang river at Nanjing area. The result shows that the model is feasibility and validity.