This paper describes visualization of thrombus formation process on orifice flows by laser sheet beam. The aim is to investigate the effects of high shear stress or shear rate on the thrombus formation or thrombus formation rate. In addition, the experimental results are compared with the CFD results. As a result, it was found that the high shear rate region of the flow has large effects of the thrombus formation and prediction method based on CFD can be used.
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