RECTILINEAR FLUID FLOW GENERATOR OF OSCILLATING TYPE.
RENSSELAER POLYTECHNIC INST TROY N Y DEPT OF MECHANICS
Pagination or Media Count:
A rectilinear fluid flow generator of an oscillating type was developed for the purpose of studying the rheological properties and flow characteristics of both Newtonian and non-Newtonian liquids. It consists essentially of a long horizontally supported straight tube which can be filled with a liquid in which an equally long concentric cylinder can be oscillated axially in harmonic motion at a predetermined frequency and amplitude. The external tube is mounted on elastic supports of measurable stiffness so that its natural frequency of axial oscillation can be readily calculated. Also, the motion of the external tube and the resultant force acting on it are readily measurable at any time. The principle of the apparatus depends on the fact that the outside tube is moved only by the liquid which itself is caused to flow by the controlled oscillations of the inside tube. It is assumed, at least in principle, that if the motion of the outside tube is known for a given motion of the inside cylinder, the constitutive equations for the liquid can be determined. Or conversely, if the constitutive equations are known, the motion of the outside tube can be calculated for a given motion of the driving inside cylinder. Author
- Fluid Mechanics