No abstract

No abstract

Blood flow in the presence of a composite stenosis is investigated by examining the effects that red cell concentration, stenosis height and a peripheral layer have on blood flow characteristics. A two-layered model with a particle-fluid suspension in the core region and a peripheral plasma layer without any particles is used to represent blood. Expressions for three flow characteristics (impedance, wall shear stress and shear stress at the stenosis throat) are derived. Flow impedance increases with increasing hematocrit, stenosis height and diameter of the vessel but decreases with increasing tube length. The shear stress on the wall increases with increasing hematocrit, stenosis height and diameter of the vessel. Trends in the shear stress at the stenosis throat and impedance are similar with the variation of any parameter. The two-fluid model's flow characteristics are lower than those of the one-fluid model. In the analysis of the particle-fluid suspension the flow characteristics there were higher than when flow is considered to be particle-free. This knowledge of how the peripheral layer affects blood flow characteristics can aid in the understanding of diseased arterial systems

No abstract

The significance of aligned magnetic flux on free convective radiative nanofluid along a stretching surface with thermal energy storage is investigated in this paper. The problem has been modelled mathematically under Newtonian slip effect. The Prandtl boundary-layer expressions are framed using Lie group analysis and treated numerically. By employing the shooting method and the Runge-Kutta fourth-order technique, a solution to the dimensionless equations is obtained. The influence of pertinent dimensionless variables on the velocity, temperature, shear stress and heat transfer rate are scrutinized via graphical plots. The results of this study show that the velocity of the nanofluid is lower and wall shear flux is higher for greater aligned magnetic flux. More energy is transferred from the fluid system when multi-walled carbon nanotubes are immersed in the base liquid. The velocity of the nanofluid is decreased with increased slip parameter. Also, the temperature rises and heat flux is reduced with enhanced thermal energy storage/generation. The numerical solutions obtained in the present work are compared to existing literature, and they are found to be in a good agreement.