Accession Number : ADA137996

Title :   Measurement of Fast Transient and Steady State Responses of Viscoelastic Fluids with a Sliding Cylinder Rheometer Executing Coaxial Displacements.

Descriptive Note : Technical rept.,

Corporate Author : CALIFORNIA UNIV BERKELEY DEPT OF CHEMICAL ENGINEERING

Personal Author(s) : Tsai,A T ; Soong,D S

PDF Url : ADA137996

Report Date : 09 Feb 1984

Pagination or Media Count : 31

Abstract : A Sliding Cylinder Rheometer (SCR) has been constructed for use with an existing Materials Test System (MTS) for the measurement of fast transient and steady-state responses of viscoelastic fluids in simple shear. Shearing is accomplished via coaxial displacement of the outer cylinder, while the inner one is held stationary. Matching pairs of circular rod and cylinder with precise dimensions, and thus well-defined annular spacings, are commercially available. The inner rod is threaded at one end for attachment to the load cell of the MTS, while flanges are welded to the outer cylinder for coupling to a cup mounted on the actuator of the MTS. Loading of the test sample is easily accomplished by raising the cup, and squeezing the fluid upwards into the annular spacing. During testing, the cup is replaced by one with large holes to eliminate pressure buildup due to compression of trapped air. This MTS-SCR combination capitalizes on the versatility and capability of the MTS programmable drive system, while the design of the SCR ensures the ideal simple shearing configuration. Experience with this new system indicates that SCR is not only less expensive to construct but also easier to use than the Parallel-Plate Rheometer (PPR) recently developed in this laboratory.

Descriptors :   *Fluids, *Viscoelasticity, *Transients, *Steady state, *Rheometers, Rheology, Fluid flow, Shear properties, Displacement, Cylindrical bodies, Rods, Test methods, Configurations, Polymers, Solutions(General)

Subject Categories : Fluid Mechanics

Distribution Statement : APPROVED FOR PUBLIC RELEASE