Couette membrane filtration with constant shear stress

Area of Science:

• Biomedical Engineering
• Fluid Dynamics
• Hematology

Background:

• Membrane filtration is crucial for blood component separation.
• Traditional methods face challenges with efficiency and cell viability.
• Couette-type configurations with Taylor vortices offer a novel approach.

Purpose of the Study:

• To analyze the physical and chemical effects of Taylor vortex-based membrane filtration on whole blood.
• To determine the technical specifications for optimal laminar flow and Taylor vortex formation.
• To investigate methods for maintaining constant shear stress and preventing hemolysis during separation.

Main Methods:

• Utilized couette-type configurations with Taylor vortices for blood component separation.
• Calculated and demonstrated technical specifications for laminar flow and vortex formation.
• Analyzed physical and chemical effects on plasma and red blood cell suspensions.
• Controlled shear stress and filtration velocity to prevent hemolysis and concentration polarization.

Main Results:

• Established technical parameters for achieving laminar flow and Taylor vortex formation.
• Demonstrated the ability to maintain constant shear stress below critical levels.
• Successfully avoided shear-induced hemolysis and maximized separation efficiency.
• Prevented concentration polarization by altering filtration velocity along the membrane.

Conclusions:

• Taylor vortex-based membrane filtration is an effective method for blood component separation.
• Controlling shear stress and filtration velocity is key to preserving blood components.
• This technique offers a promising approach for efficient and safe blood processing.