The authors used a variety of techniques to determine the thermal properties of polymethyl methacrylate (PMMA), including thermal conductivity, thermal diffusivity, specific heat and density. The measurements are performed in the temperature range from -70°C to 80°C. The results from the different techniques used to characterize the PMMA (GHP, GHF, TPS, THS) are all compared to see whether they agree with one another....
The author compares some currently existing method of measuring thermal conductivity and elaborates on a couple of newer methods. The pre-existing methods include hot wire and laser flash diffusivity, and the newly introduced methods are the modified how wire (MHW) and transient plane source (TPS) techniques. The necessary conditions (samples sizes, sample composition, test times, etc) are explained for the two newly introduced techniques. Experimental runs are carried out using ...
Through the use of wood shavings as a filler for sand concretes, the authors have been able to improve the thermal properties of the prepared concrete as well as reuse a waste product. The previously used concrete had a higher thermal conductivity and higher density, and through the addition of wood shavings to the concrete mixture, the density and thermal conductivity of the composites have been lowered. The transient plane ...
In this article, the authors look at and compare the different methods that can be used for the measurement of thermal conductivity of nanofluids. These methods include THW and TPS among other transient and steady-state methods. This was investigated due to the large differences in thermal conductivity that were being reported for the same nanofluid from different laboratories around the world. It was determined that the system/method used the ...
Using the dynamic plane source (DPS) technique, the thermal properties of highly and lowly thermally conducting materials were measured. The theory behind the technique is explained, and three well known materials are analyzed and the accuracy of the method is found to be within 5% of the actual value....
