Finite element modeling of the Hot Disc method
Artikel i vetenskaplig tidskrift, 2017

The Hot Disc method, also known as the transient plane source (TPS) technique, is an experimental approach to determine the thermal transport properties of materials. The core of the method is the Hot Disc sensor, an electrically conducting metallic strip, shaped as a double spiral clad with a protective polymer film. The mean temperature increase in the sensor has been approximated from various analytical approaches such as: the concentric ring sources model, the thermal quadrupoles formalism, and concentric circular strips structure approach. However, full numerical simulation of the sensor has not been addressed so far. Here we develop a 3D model of Hot Disc sensors and compare simulated mean temperature increase to experimental recordings. Joule heating coupled with heat transfer of solids (of COMSOL Multiphysics software) is used to simulate the working principle of the sensor. The volume mean temperature increase in the sensor from the simulations proves to be in a good agreement with the corresponding experimental recordings. The temperature distributions of the metallic strip are also evaluated and discussed with respect to the previous experimental findings. Furthermore, the current distribution across the strip is obtained. Such simulation can potentially be used in further optimizing geometry and parameter estimation.

Joule heating

Multiphysics modeling

Hot Disc method

Finite element simulation

Hot Disc sensor

Thermal conductivity measurement

Transient temperature

Författare

Besira Mekonnen Mihiretie

Chalmers, Fysik, Kondenserade materiens fysik

Daniel Cederkrantz

Hot Disk AB

Arne Rosen

Göteborgs universitet

Henrik Otterberg

Hot Disk AB

Maria Sundin

Göteborgs universitet

S. Gustafsson

Thermetrol AB

Magnus Karlsteen

Chalmers, Fysik, Kondenserade materiens fysik

International Journal of Heat and Mass Transfer

0017-9310 (ISSN)

Vol. 115 216-223

Ämneskategorier

Fysik

Styrkeområden

Materialvetenskap

DOI

10.1016/j.ijheatmasstransfer.2017.08.036