一种自由面大变形流动的CFD模型  

CFD modeling of distorted free surface flow

作　　者：赵西增[1,2] 

机构地区：[1]浙江大学海洋学院,浙江杭州300058 [2]国家海洋局第二海洋研究所,卫星海洋环境动力学国家重点实验室,浙江杭州310012

出　　处：《浙江大学学报（工学版）》2013年第8期1384-1392,共9页Journal of Zhejiang University：Engineering Science

基　　金：国家自然科学基金资助项目(51209184);中央高校基本科研业务费专项资助项目(2012QNA4020);浙江省教育厅科研资助项目(Y201225713);浙江省重中之重学科“海洋机电装备技术”开放基金资助项目

摘　　要：为了准确预测极端波浪对建筑物的作用,提出一种多相流数学模型,开展波面破碎、翻滚等自由面大变形流动问题的数值模拟.该模型在直角坐标系统下建模,以高阶差分紧致插值曲线(CIP)方法为流场基本求解器,离散了纳维-斯托克斯方程,通过多相流理论描述固-液-气之间的相互作用,采用双曲正切函数(THINC)方法改进传统的数学模型,更准确地重构自由面.对溃坝问题开展数值模拟,通过与他人实验结果的比较验证模型的有效性;并将模型应用于极端波浪对浮式结构作用的研究,通过与实验结果的比较,验证结果的正确性.结果表明该模型真实再现复杂自由面流动问题的诸多物理特性.A multiphase model is developed,which is applicable of simulating free surface flow including wave breaking and overturing.The numerical simulation is performed through the constrained interpolation profile（CIP）-based method combined with a more accurate volume of fluid（VOF） type scheme,the tangent of hyperbola for interface capturing（THINC）,as the free surface capturing method.To assess the developed algorithm and its versatility,the dam breaking problem is simulated.Good agreement is obtained by comparing the computational results with experimental data.Finally,the model is used to study the nonlinear interaction between extreme waves and a floating structure and validated with experimental results.It is demonstrated that many of the typical features in complex flow patterns can be captured in the present numerical model.

关 键 词：紧致插值曲线（CIP） 自由面流动 溃坝 极端波浪 双曲正切函数（THINC） 

分 类 号：O352[理学—流体力学]