Rheometer for determining extensional elasticity
US5456105A · kind A · utility
9Cited by
12References
6Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Oct 14, 1993 |
| Grant date | Oct 10, 1995 |
| Priority date | — |
| Expiry date | Oct 14, 2013 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N11/14
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A method determining the extensional elasticity of a fluid includes the step of determining the shear viscosity of a fluid in a flow field where the shear rate of the fluid is substantially uniform. A valve indicative of the shear viscosity and extensional elasticity is obtained by performing measurements in a flow field where a portion of the body of the fluid is accelerated. The two values are then compared to obtain an indicator of the extensional elasticity.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.