We have developed ultrasonic-measurement-integrated (UMI) simulation, in which feedback signals based on the optimal estimation of errors in the velocity vector determined by measured and computed Doppler velocities at feedback points are added to the governing equations (see Fig. 1) [1,2]. Our previous numerical studies showed the efficiency of UMI simulation for reproduction of blood flow field, as well as the transient and steady characteristics. However, in real ultrasonic measurement, noise is often included and may deteriorate the computational accuracy of UMI simulation. In this study, the effect of the ultrasonic measurement error due to Gaussian noise on UMI simulation was evaluated by a numerical experiment.

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