A microscale pulsatile flow device for dynamic cross-slot rheometry
نویسندگان
چکیده
منابع مشابه
An Optimized Cross-Slot Flow Geometry for Microfluidic Extensional Rheometry
A precision-machined cross-slot flow geometry with a shape that has been optimized by numerical simulation of the fluid kinematics is fabricated and used to measure the extensional viscosity of a dilute polymer solution. Full-field birefringence microscopy is used to monitor the evolution and growth of macromolecular anisotropy along the stagnation point streamline, and we observe the formation...
متن کاملOptimized cross-slot flow geometry for microfluidic extensional rheometry.
A precision-machined cross-slot flow geometry with a shape that has been optimized by numerical simulation of the fluid kinematics is fabricated and used to measure the extensional viscosity of a dilute polymer solution. Full-field birefringence microscopy is used to monitor the evolution and growth of macromolecular anisotropy along the stagnation point streamline, and we observe the formation...
متن کاملPurely elastic flow instabilities in microscale cross-slot devices.
We present an experimental investigation of viscoelastic fluid flow in a cross-slot microgeometry under low Reynolds number flow conditions. By using several viscoelastic fluids, we investigate the effects of the microchannel bounding walls and the polymer solution concentration on the flow patterns. We demonstrate that for concentrated polymer solutions, the flow undergoes a bifurcation above ...
متن کاملA Microfluidic Cross-Slot Device for Measurement of Erythrocyte Deformability
Red blood cell (RBC) deformation is a dominant factor in the rheological properties of blood in vessels smaller than 300 micrometers. A reduction in cell deformability is associated with health conditions such as malaria and diabetes. The extensional flow within a microfluidic cross-slot microchannel has been proposed as a mechanism for measuring the deformation of cells. Three-dimensional simu...
متن کاملPULSATILE MOTION OF BLOOD IN A CIRCULAR TUBE OF VARYING CROSS-SECTION WITH SLIP FLOW
Pulsatile motion of blood in a circular tube of varying cross-section has been developed by considering slip flow at the tube wall and the blood to be a non- Newtonian biviscous incompressible fluid. The tube wall is supposed to be permeable and the fluid exchange across the wall is accounted for by prescribing the normal velocity of the fluid at the tube wall. The tangential velocity of the fl...
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ژورنال
عنوان ژورنال: Sensors and Actuators A: Physical
سال: 2014
ISSN: 0924-4247
DOI: 10.1016/j.sna.2014.09.019