Real-space correlation coefficient

Real-time wall shear stress is difficult to monitor precisely because it varies in space and time. MEMS sensors provide high spatial resolution to resolve variations in shear stress in a 3D bifurcation model for small-scale hemodynamics. The application of MEMS sensors with backside wire bonding G ig. fib) captured the spatial variations in shear stress in a 3D bifurcation model (Fig. 8). The measured skin friction coefficients at various positions correlated well with values derived from the exact Navier-Stokes solution of the flow within the bifurcation [13]. Therefore, the development of MEMS sensors has enabled the precise measurements of spatial variations in shear stress for small-scale hemodynamics otherwise difficult with conventional technologies such as computed tomography (CT scan), magnetic resonance imaging (MRI), ultrasound, and laser Doppler velocimetry. 

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