Published Paper Details:

The concept of viscosity is commonly used to characterize a material, but it is not adequate to describe the mechanical behavior of a substance, particularly non-Newtonian fluids. several other rheological properties which relate the relations between the stress and strain rate tensors under different flow conditions, such as oscillatory shear, or extensional flow can be described the mechanical behavior of non-Newtonian fluids like Blood. Viscoelasticity is a rheological phenomenon that describes the flow properties of complex fluids like blood. Viscoelastic materials have interesting properties. They exhibit both viscous behavior as well as elasticity. The viscosity and elasticity of blood are direct indicators of how these parameters affect the ability of the blood to flow under the shear conditions imposed by the pulsatility of the circulation. The present study aims at 1.)To measure velocity of blood for different flow rates in a capillary tube, which is achieved by allowing the blood to flow in a capillary tube of different radii and 2) To measure ultrasonic velocity and absorption in blood at different frequencies. The data is presented and findings and conclusions are drawn from this data.