The occurrence of turbulent flow in the rabbit aorta

The velocity of blood flow in the rabbit aorta studied with high‐speed cinematography

“…A further five animals were studied in the preliminary stages with variations of technique which were either unsatisfactory or failed for other reasons. Analysis of the velocities of flow using air-bubbles in comparison with the axial velocity measured with a dye injection led to the conclusions that the velocity of a spherical air-bubble was approximately the mean laminar velocity (McDonald, 1952). This assumption has been accepted in the present work and velocities quoted here are mean velocities.…”

Pressure is proinflammatory in lung venular capillaries

“…However, pressure-enhanced exocytosis occurred primarily at capillary branch points. A rheological explanation for this site dominance may be considered, because in large vessels, branch points are associated with increased turbulence and changing gradients of shear rate (49). However, the low Reynolds number flow in lung capillaries prevents turbulence and maintains relatively low shear rates (48 These findings underscore the pathophysiological significance of the post-alveolar venular capillary.…”

Experimental study of aortic flow in the ascending aorta via Particle Tracking Velocimetry

“…It is assumed that the flow becomes turbulent in large arteries such as aortas (Nerem et al 1972). McDonald (1952) studied the existence of turbulent flow in a rabbit aorta. He showed that the laminar flow becomes turbulent before the peak systole.…”

“…He showed that the laminar flow becomes turbulent before the peak systole. The flow at the bifurcation of the aorta was also analyzed, and the same author reported that eddying motion occurs when there is back flow (McDonald 1952). Nerem et al (1972) examined the velocity distribution and transition to turbulence in the thoracic aorta of dogs based on visual observation of instantaneous velocity wave forms and frequency spectrum analysis.…”