scholarly journals Measurement of Effective Thermal Diffusivity of a Polyethylene Composite Filled with Copper Particles, by Laser Flash Method.

Netsu Bussei ◽  
1995 ◽  
Vol 9 (1) ◽  
pp. 17-23 ◽  
Author(s):  
Yasuyuki Agari ◽  
Masayuki Shimada ◽  
Akira Ueda
Keyword(s):  
Thermal Diffusivity ◽  
Laser Flash ◽  
Laser Flash Method ◽  
Flash Method ◽  
Effective Thermal Diffusivity ◽  
Copper Particles ◽  
Polyethylene Composite

Numerical Simulation of Thermal Diffusivity Measurements with the Laser-Flash-Method to Evaluate the Effective Property of Composite Materials

2021 ◽  
Author(s):  
Michele Potenza ◽  
Paolo Coppa ◽  
Sandra Corasaniti ◽  
Gianluigi Bovesecchi
Keyword(s):  
Thermal Diffusivity ◽  
Composite Structures ◽  
Laser Flash ◽  
Least Square ◽  
Laser Flash Method ◽  
Flash Method ◽  
Fiber Reinforced ◽  
Inhomogeneous Materials ◽  
Effective Thermal Diffusivity ◽  
Diffusivity Measurements

Abstract Laser Flash Method (LFM) is commonly used to measure the thermal diffusivity of homogeneous and isotropic materials, but it can be also applied to macroscopically inhomogeneous materials, such as composites. When composites present thermal anisotropy, as fiber-reinforced, LFM can be used to measure the effective thermal diffusivity (aeff) in the direction of heat flux. In the present work, the thermal behavior of composites during thermal diffusivity measurements with the LFM was simulated with a Finite Element Model (FEM) using commercial software. Three composite structures were considered: sandwich layered (layers arranged in series or parallel); fiber-reinforced composites; particle composite (spheres). Numerical data were processed through a non-linear least-square fitting (NL-LSF) to obtain the effective thermal diffusivity of the composite. This value has the meaning of "dynamic effective thermal diffusivity". Afterward, the effective thermal conductivity (?eff) is calculated from the dynamic effective thermal diffusivity, equivalent heat capacity and density of the composite. The results of this methodology are compared with the analytically calculated values of the same quantity, which assume the meaning of "static effective thermophysical property". The comparison of the dynamic and static property values is so related to the inhomogeneity of the samples, a deviation of the temperature vs time trend from the solution for the perfectly homogeneous sample gives information about the sample's lack of uniformity.

A high-temperature system based on the laser flash method to measure the thermal diffusivity of melts

1996 ◽  
Vol 17 (1) ◽  
pp. 253-261 ◽  
Author(s):  
Y. Maeda ◽  
H. Sagara ◽  
R. P. Tye ◽  
M. Masuda ◽  
H. Ohta ◽  
...  
Keyword(s):  
High Temperature ◽  
Thermal Diffusivity ◽  
Laser Flash ◽  
Laser Flash Method ◽  
Flash Method ◽  
High Temperature System

scholarly journals Measurement of Thermal Diffusivity of Steels at Elevated Temperature by a Laser Flash Method.

2002 ◽  
Vol 42 (5) ◽  
pp. 498-503 ◽  
Author(s):  
Tsuyoshi Nishi ◽  
Hiroyuki Shibata ◽  
Koichi Tsutsumi ◽  
Hiromichi Ohta ◽  
Yoshio Waseda
Keyword(s):  
Elevated Temperature ◽  
Thermal Diffusivity ◽  
Laser Flash ◽  
Laser Flash Method ◽  
Flash Method

Thermal Diffusivity of 16Kh12V2FTaR Steel in a Wide Temperature Range

2013 ◽  
Vol 8 (3) ◽  
pp. 163-167
Author(s):  
Alibek Agazhanov ◽  
Igor Savchenko ◽  
Dmitriy Samoshkin ◽  
Sergey Stankus ◽  
Olga Dutova
Keyword(s):  
Phase Transitions ◽  
Thermal Diffusivity ◽  
Wide Temperature Range ◽  
Curie Point ◽  
Martensitic Steel ◽  
Laser Flash ◽  
Austenite Phase ◽  
Laser Flash Method ◽  
Flash Method ◽  
Temperature Range

Thermal diffusivity of the ferritic-martensitic steel 16Kh12V2FTaR in the temperature range from 296 to 1274 K has been measured by the laser flash method with the error of 2–4 %. The approximating equations have been obtained, the Curie point of steel and the temperatures of martensitic-austenite phase transitions have been determined

Uncertainty of Thermal Diffusivity Measurements by Laser Flash Method

2005 ◽  
Vol 26 (6) ◽  
pp. 1883-1898 ◽  
Author(s):  
B. Hay ◽  
J. R. Filtz ◽  
J. Hameury ◽  
L. Rongione
Keyword(s):  
Thermal Diffusivity ◽  
Laser Flash ◽  
Laser Flash Method ◽  
Flash Method ◽  
Diffusivity Measurements
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