Fully-developed pulsating liquid flows in a three-dimensional wavy wall microtube
Influences of a three-dimensional wavy wall on the fully-developed pulsating liquid flows in microtube were studied in this paper. Fully-developed pulsating liquid flows driven by the pulsating pressure gradient in microtube with non-axisymmetric wavy wall were considered. The pulsating pressure gradient can be split into the steady and the oscillatory terms, and therefore the velocitieswere split into steady and the oscillatory terms in the same way. The analytical and numerical results show that the variations of disturbances are dependent on those of pulsating frequency. When thefrequency increases large enough, subsidiary stresses will approach to their asymptotic solutions. Inaddition, it is found that the subsidiary stress layers gradually become thinner with increasing of thepulsating frequency, and therefore the wall disturbances are dicult to be transmitted to the center ofthe flow area. At the low frequency of pulsation, the curve shapes of oscillatory subsidiary stresses arenearly consistent with the cases of steady flow. The variations of phase shifts are between the values.-Π/2 andΠ/2, which is independent of the choices of parameters (including the choices of oscillatory pressure drop), and the extreme values of them tend to -Π/2 andΠ/2 as the pulsating frequency approaches to infinity.
microtube wavy wall pulsating flow
H.L.Wang Y.Wang
College of Metrological Technology & Engineering, China Jiliang University, Hangzhou 310018, China Department of Fluid Mechanism, Xi’an Jiaotong University, Xi’an 710049, China
国际会议
The Fifth International Conference on Fluid Mechanics(第五届国际流体力学会议)
上海
英文
2007-08-15（万方平台首次上网日期，不代表论文的发表时间）