长矩形截面腔体内具有缺陷的对传行波斑图  

Patterns of Counter Propagating Wave with Defects in a Long Rectangular Cell

作　　者：郝建武[1] 宁利中[1] 王卓运[1] 王娜[1] 

机构地区：[1]西安理工大学水利水电学院,西安710048

出　　处：《力学季刊》2013年第1期139-146,共8页Chinese Quarterly of Mechanics

基　　金：国家自然科学基金项目(10872164);陕西省教育厅专项计划项目(09JK643);"陕西省重点学科建设专项资金"资助

摘　　要：在长高比Γ=40、分离比ψ=-0.6情况下,通过流体力学基本方程组的数值模拟,得到了一种新的有趣斑图,即单侧缺陷摆动对传行波。通过分析单侧缺陷摆动对传行波各物理场随时间变化的等值线图、波形图,讨论了其形成过程及时空动力学特性。进一步对比不同相对瑞利数下的单侧缺陷摆动对传行波,探讨了缺陷数、缺陷周期以及缺陷方向等缺陷特征对相对瑞利数的依赖性。Based on numerical simulations of fully hydrodynamic equations, a new interesting pattern was founded in the condition of aspect ratio = 40 and separation ratio b = - 0.6. The new pattern was named as counter propagating wave with unilateral defect and oscilation. By analysising isopleth patterns and wave patterns of each field as a function of time, the formation process and spatio-temporal dynamics of counter propagating wave with unilateral defect and oscilation were studied. Further more, comparing counter propagating wave with unilateral defect and oscilation under different reduced Rayleigh numbers, the dependence of defect characterics, such as defect amount, defect period and defect direction, on re- duced Rayleigh numbers, was discussed.

关 键 词：单侧缺陷 对传行波 分离比 瑞利数 

分 类 号：O357[理学—流体力学]