Non-intrusive measurement of wall shear stress in flow channels

摘要: Abstract Flow shear stress measurement plays an important role in the characterization of macro and microfluidic systems. Many currently used wall sensors quantify local with use fluid-disruptive probes, unless installed accurately flush to channel surface. Non-intrusive systems capable quantifying vector field larger areas are highly desirable. The present study reports on non-intrusive direct under pressure-driven fluid flows particle imaging velocimetry Fourier transform traction cytometry. This method uses known mechanical properties a soft substrate strained flow field. Under fully developed laminar different rates rectangular channel, average magnitude thus obtained matched theoretical results for Poiseuille flow. major advantage this is experimental without disruption itself. shows promise diverse such as aerospace bioengineering.