Motions of a liquid in a pulsating bulb with application to problems of blood flowPotential flows may be utilized to represent motions produced in pulsating bulbs. While the initial bulb shape may be arbitrary, sequential shapes are related by affine transformations. Two components appear in the distribution of pressure, one dependent on the instantaneous velocity and the other on the acceleration. For flows with stationary streamlines the inertial impedance is that of a simple mass, and is proportional to the first moment of the actual mass of fluid contained within the bulb. Examples treated are: (1) Expanding and collapsing circular cylinders, and (2) elliptical cylinders in which the perimeter is held constant. The thickness of the pulsatile laminar boundary layer is found to be approximately on millimeter for conditions in the vicinity of the heart. Conditions for separation and turbulence differ from those in steady flow.
Document ID
19760012030
Acquisition Source
Legacy CDMS
Document Type
Other
Authors
Jones, R. T. (Avco-Everett Research Lab. MA, United States)
Date Acquired
August 8, 2013
Publication Date
February 1, 1976
Publication Information
Publication: NASA. Ames Res. Center Collected Works of Robert T. Jones