Method for simultaneous determination of thermal conductivity and kinematic viscosity
US5452601A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 22, 1994 |
| Grant date | Sep 26, 1995 |
| Priority date | — |
| Expiry date | Mar 22, 2014 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N27/18
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A heating sensor capable of generating heat and measuring its own temperature is placed in a fluid and a thermometric sensor is placed in the fluid and inside a temperature boundary layer formed around the heating sensor upon heat generation therefrom. A temperature of the heating sensor and a temperature of the fluid are measured. A relationship between thermal conductivity of the fluid and a differential value between the temperature of the heating sensor and the temperature of the fluid is used to determine the thermal conductivity of the fluid. Then, the heating value of the heating sensor is adjustably increased so that the thermometric sensor is positioned outside the temperature boundary layer. A temperature of the heating sensor and the temperature of the fluid are measured. The relationship between kinematic viscosity of the fluid and a differential value between the temperature of the heating sensor and the temperature of the fluid is used to determine the kinematic viscosity of the fluid. Alternatively, a single heating sensor and a pair of the thermometric sensors are used, where one of the thermometric sensors is placed outside the temperature boundary layer, and the o…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.