References in periodicals archive ?
[14] performed both numerical simulations and in vitro experiments on thoracic aorta to investigate the correlation of wall shear stress, pressure, and oscillatory wall shear stress index with aortic disorders, particularly aortic dissection.
The spatial and temporal variation of wall shear stress from the present study can be fed into other models to investigate the effect of wall shear stress on stresses and strains that individual endothelial cells may tolerate locally.
By applying a simple force balance (Bird et al., 2002) and assuming uniform wall shear stress in a given position along the pipe, the wall shear stress can also be determined by:
The changes in flow direction result in the directional changes in local wall shear stresses, which may injure the intima, particularly at the distal neck of the aneurysm.
To understand the actual physics of wall shear stress, the flow close to the boundary layer has to be accurately captured.
The major difference among these two models in predicting the wall shear stress is at the proximal neck region; the CFD model overestimates the wall shear stress by 30% compared to the FSI model at the deceleration phase.
Slip heating provides most of the heating at high exterior surface temperatures and wall shear stresses. Because both sources of temperature rise are of similar magnitude, neither should be neglected when correcting temperature data in flows where viscous dissipation matters.
The tundish construction described there in incorporates an impact pad to define the pouring area for the molten metal, curvature of tundish walls, wall inclinations, the depth of the inlet etc., The simulations were carried out with and without pouring chamber to understand the role of pouring chamber in the wall shear stress. It was found that pouring chamber has a dominant role in reducing the wall shear stress by modifying the fluid flow in the tundish.
where s is actual riblet spacing, v is the kinematic viscosity of the fluid, [s.sup.*] is a dimensionless expression of riblet spacing for which the range 10-20 has been determined to be optimal (11, 14), [[Tau].sub.w] is the wall shear stress due to the flow, and [Rho] is the fluid density.
The objective of this study was to investigate quantitatively the inspiratory and expiratory airflow characteristics (velocity, pressure, and wall shear stress) in tracheobronchial airways (G6-G9) of infant, child, and adult using CFD modeling.
The hemodynamic parameters of blood flow, such as blood pressure and arterial wall shear stress (WSS), provide important information about the pathophysiological mechanisms underlying vascular diseases [1].