ISSN:
1435-1528
Keywords:
Rheometers
;
on-line
;
in-line
;
non-Newtonian fluids
;
suspensions
Source:
Springer Online Journal Archives 1860-2000
Topics:
Chemistry and Pharmacology
,
Physics
Notes:
Abstract Process rheometers are useful as process sensors for on-line quality control as well as for process control. Unlike passive sensors for equilibrium properties, such as temperature and pressure, a rheometer must subject the material of interest to a controlled deformation while monitoring the resulting stress. To accomplish this in a compact, robust device suitable for use in a manufacturing environment is not straightforward. Problems that arise in processing applications include the need for frequent sample renewal without interference from the measurement or the process itself and the fact that the process stream is usually under pressure. Considerable ingenuity has been applied to developing rheometers to meet these requirements. However, there remain many potential applications for which presently available units are not suitable. In particular, special problems arise when a very fast response is required, when the fluid being processed is non-Newtonian or has a very high viscosity, and when it is a multiphase system, as for example in the case of mineral slurries. In addition, in food processing and fermentation applications, all the exposed surfaces of the rheometer must be sterilizable. Possible solutions to these problems are described.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF01329297
