Dipl.-Phys Kathrin Gester
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Typically during the numerical analysis of a blood containing device, the fluid is modeled as homogeneous, with no consideration to the separation of blood components.. However, this separation of blood components is a known effect, for example, during the flow through a capillary with a diameter less than 100µm (Fåhraeus-Lindquist effect). This phenomenon is also observed in narrow gaps, such as those found in the bearings of mechanical heart valves or rotary blood pumps. In close vicinity to these bearings, cell separation can cause a reduction in hemolysis and thus have a positive effect. Therefore the examination of blood as a multi phase fluid provides considerable insights into the hematologic impact of blood contacting devices and has the potential to provide a more accurate predictions during device development and optimization.