流经四面体透水框架群水流的平面二维数值模拟
首发时间:2009-02-23
摘要:四面体透水框架群护岸技术以其明显的功能和造价优势,得到越来越多的应用和研究。四面体透水框架群内部几何结构复杂,穿过框架群的水流是典型的三维紊流,很多相关研究往往是通过物模实验进行的。四面体透水框架群是由很多单个四面体框架抛投而成,具有很大的空隙,因而,可以将框架群看成由很多框架杆件和大的孔隙组成的大孔隙率多孔介质。本文首次尝试利用Fluent软件的介质模型对经过四面体透水框架群的水流进行了平面二维数值模拟,通过模型验证,多孔介质模型能较好地用于四面体透水框架群模拟;另外,通过数值计算,研究了Re、相对宽度b/B、相对长度l/B对四面体透水框架群下游保护长度的影响。
关键词: 四面体透水框架群 Fluent 多孔介质模型 二维数值模拟
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The simulation of 2D overflow of permeable tetrahedrons
Abstract:With the obvious advantage in multi-function and cost, the revetment,Group of permeable tetrahedrons, gets more used and studied. The internal geometric structure of the group is complex,and the overflow of it is a typical 3D turbulent flow. Relevant studies were often taken through Physical model experiments. The revetment is made up of many single permeable tetrahedrons,and has much gap,so the group of permeable tetrahedrons can be treat as the porous media with large porosity.The porous media model of software FLUENT was introduced to simulate the 2D flow through permeable tetrahedrons,and an experiment was conducted to verify the simulation;With the simulation,the influence of parameters such as Re、relative width b/B and relative length l/B on the protected length downstream of permeable tetrahedrons was studied.
Keywords: permeable tetrahedrons FLUENT the porous media model 2Dnumerous simulation
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