Device and method for measuring the viscosity of a fluid
US8844339B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 15, 2009 |
| Grant date | Sep 30, 2014 |
| Priority date | — |
| Expiry date | Apr 7, 2031 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N11/00
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
The invention relates to a method for measuring the viscosity of a fluid, said method comprising the following steps: (a) providing a flow of said fluid in a laminar state inside a channel (14, 24) having a characteristic transverse dimension D, and in which an elongate member (12, 22) having a characteristic dimension d is placed substantially along the longitudinal direction of said channel and substantially at the center of the channel, and has a portion of the length l thereof submerged in said channel; (b) measuring the friction force (f) applied by said fluid on the walls of the elongate member; and (c) calculating the dynamic viscosity (η) of said fluid based on the equation (1) f=ληlU where U is the average flow rate and λ is a geometric factor.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.