Suchergebnisse

In this paper, the effects of hematocrit of red blood cells on blood flow through a stenosed human carotid artery was considered by taking blood as a Newtonian fluid. The governing equations on blood flow were derived. The mathematical content involved in the equations are the variables of interest such as number of stenosis , percentage of hematocrit of red blood cells in the blood, flow rate, wall shear stress, and viscosity of the blood. Guided by medical data collected on the constraint of blood flow in stenosed human carotid arteries, the governing equations were used to check the effects of pressure gradient, wall shear stress, velocity, and volumetric flow rate of blood in the human carotid arteries. Also, the one-dimensional equation for the steady and axially symmetric flow of blood through an artery was transformed using Einstein's coefficient of viscosity and hematocrit of red blood cells with the help of the boundary conditions. The effects of hematocrit on the blood flow characteristics are shown graphically and discussed briefly. It was discovered that the resistance increases as the level of hematocrit increases. Also, the wall shear stress decreases with the increase in the hematocrit level of the red blood cells.

Magnetohydrodynamic (MHD) effects of unsteady blood flow on Casson fluid through an artery with overlapping stenosis were investigated. The nonlinear governing equations accompanied by the appropriate boundary conditions were discretized and solved based on a finite difference technique, using the pressure correction method with MAC algorithm. Moreover, blood flow characteristics, such as the velocity profile, pressure drop, wall shear stress, and patterns of streamlines, are presented graphically and inspected thoroughly for understanding the blood flow phenomena in the stenosed artery.

This article combines in-depth interviews and Karen Barad's work on materiality to think about the ways in which the materiality of blood might be understood in relation to sociality and blood-borne virus prevention among BDSM (bondage and domination, dominance and submission and sadomasochism) body modification practitioners in Sydney, Australia. In doing so, it confronts questions of how the materiality of blood can be theorized in ways that neither presume a fixed, a priori ontological status or essence, nor exclude it from an active role in the production of realities. In taking account of both its co-constitutive role in practice, and its figurative power (as flow) in understanding the mind/body, discourse/materiality conjunctions at work in BDSM body modification practice, we aim to illuminate further the imbrication of materiality and meaning, and generate a more complex and fruitful account of blood for the purposes of blood-borne virus prevention and education.