南京大学学报(自然科学版) ›› 2012, Vol. 48 ›› Issue (5): 565571.
张颖,刘晓宙,龚秀芬
Zhang Ying ,Liu Xiao Zhou**,Gong Xiu Fen
摘要: 木文研究了血液中的声流问题.声流是液体中的一种稳定流体,主要由于声振动的吸收产生.当声波传播过程中遇到像坚硬的平面、圆柱面或者球面时,就会导致声流的产生.在关于边界条件所引起的声流的研究中,气泡有着重要意义.声孔效应主要是指在超声和气泡的共同作用下通过声流作用暂时性的打开细胞膜让外界的分
子进入,之后细胞可以修复,其特点是损伤小,可修复.前人通过引入镜像法,对硬边界附近的孤立气泡产生的剪应力作了理论研究,并给出了剪应力最大值的推导方法和其对声孔效应的意义.木文将在此基础上,将硬边界附近单气泡模型扩展到双边界情况,将其应用于声流的研究和所产生的剪应力的计算.在双边界情况下,通过数值模拟计算的方式,具体分析了声流待测点位置,血液的粘滞系数,气泡的半径等相关参数对剪应力的影响.
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