- Author
-
Martin, S. B.
- Title
- Simple Radiant Heating Method for Determining the Thermal Diffusivity of Cellulosic Materials.
- Coporate
- Naval Radiological Defense Laboratory, San Francisco, CA
- Report
-
USNRDL-TR-352; DASA-1136,
Spril 29, 1959,
13 p.
- Contract
- NS-081-001
- Keywords
-
cellulosic materials
|
radiant heating
|
thermal diffusivity
- Abstract
- A simple radiometric method for the determination of the thermal diffusivity of poorly conducting, sheet form materials such as cellulosic kindling fuels is described. The method is a dyamic one based on the "long time" solution of the heat conduction equaiton for the infinite slab with constant heat input rate, and ulilizes fine wire thermocouples laminated between sheets of the material (whose diffisivity is required) to measure rates of temperature rise at various depths. The geometry of the system is designed to satisfy as many as possible of the boundary conditions imposed on the mathematical model. The magnitude of errors introduced by violating the other boundary conditions are discussed in connection with the results of measurements on a-cellulsoe.