Wall Shear Stress Measurements in Artificial Heart Valves with Hot-Film Probes
For blood traumatization after the implantation of artificial organs, such as artificial heart valves, the shear field generated by the prosthesis is believed to be a prime factor. Therefore, it is of interest to determine the shear stress experimentally in heart valve prostheses in a mock circuit, especially since the results of several research groups indicate that shear stresses above a critical level lead to irreversible damage of blood components. Hot film anemometry with flush mounted probes is used as measurement technique. Since the flow in the human systemic arteries is pulsatile, the hot film wall shear probes are to be calibrated under steady and unsteady flow conditions in order to determine their dynamic characteristics.
KeywordsConvection Attenuation Eter Cali Ball Valve
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