The measurement of thermal and ultrasonic properties of biological tissues is essential for the assessment of the temperature rise induced in vivo by diagnostic ultrasound. In this paper, we present measurements of thermal conductivity, thermal diffusivity, speed of sound and ultrasonic attenuation of fresh ex vivo porcine tissue, namely 'muscle' (from abdomen and leg), 'skin with subcutaneous fat' (from abdomen and leg), 'abdominal fat' and 'bone'. The measurements of the ...
Author(s): A. Shaw, D. K. Nassiri, G. Terhaar, I. Rivens, K. Lozhken, M. A. El-Brawany
Presently, converting waste into reusable materials is a high priority among researchers. This study presents the idea of recycling the natural rubber (NR) from latex condom waste, for its use as a potential filler in styrene butadine rubber (SBR). To properly understand the SBR material ratio aspect, thermal behaviour monitoring, such as thermal conductivity measurements using the Transient Plane Source method, was performed. A linear increase in thermal conductivity of ...
Author(s): G. Mathew, N. S. Saxena, P. Pradeep, S. Thomas
A new application for the transient hot-wire technique for thermal conductivity measurements has been described. It is intended to provide an accurate means of implementation of the method to the determination of the thermal conductivity of solids exemplified by a standard reference ceramic material. Measurements of the transient temperature allows an absolute determination of the thermal conductivity of the solid. The uncertainty achieved for the thermal conductivity is better than ±1%, ...
Author(s): Ahmad Gharleghi, Chia-Jyi Liu, Fei-Hung Lin, Yi-Hsuan Pai, Yu-Hsien Chu, Zong-Ren Yang
In mold fluxes, fluorine is generally added to reduce viscosity and solidification. The fluorine however, tends to cause corrosion of the casting machine and leads to environmental pollution. To potentially rid this design of these issues, researchers in this study examined the Fluorine-free mold flux, in a specific glass system. Properties such as viscosity, thermal conductivity and crystallization behaviour were all analyzed and compared to the values for the commercial ...
Author(s): Dong-Han Lee, Dong-Won Shin, Jong-Min Park, Jung-Wook Cho, Se-Young Choi, Soon-Yong Choi
Using magnetic striation and ultrasonic agitation, aluminum nitride particles were dispersed into ethanol. The method was used to measure the thermal conductivities of these aluminum nitride-ethanol nanofluids. Results show about 20 % increase in the thermal conductivity of ethanol and a strong temperature dependence of the thermal conductivity....
Author(s): F. Yu, P. Hu, W. Shan, Z. Chen
