A novel resistance measurement technique in the field of directional solidification

Salvi, C.; Garandet, J.P.

doi:10.1063/1.1324737

Cited by 6 publications

(1 citation statement)

References 22 publications

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“…Both X-ray tomography and radiography allow for the visualization of solid-liquid interfaces regardless of optical transparency [3][4][5] and thus both methods can detect changes in the material density associated with phase changes, however these methods are laboratory-based and incapable of providing real time information. During melting or solidification, most PCMs show changes in electrical resistance, therefore resistance diagnostics has also been used for the detection of phase changes [6]. However this method is only applicable to bulk material samples and does not allow for phase detection at a specific points within the sample's volume.…”

Section: Introductionmentioning

confidence: 99%

SNS optical fiber sensor for direct detection of phase transitions in C18H38 n-alkane material

Han

Rebow

Lian

et al. 2019

Experimental Thermal and Fluid Science

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A single-mode-no-core-single-mode (SNS) fiber optical sensor for the detection of solidliquid and liquid-solid phase changes in C18H38 n-alkane (n-octadecane) is proposed and demonstrated. The transmission-type sensor probe consists of a short section of no-core fiber sandwiched between two sections of a single-mode fiber. Phase changes in n-octadecane are accompanied by large step-like variations of its refractive index (RI). Such a large discontinuous change of the n-octadecane's RI during its phase transition leads to the corresponding step-like change in the transmitted optical power that can reliably indicate the phase change of the sample in the vicinity of the sensor. The proposed sensor probe is simple, accurate and is capable of detecting the material's phase based on a single measurement. The results of this work suggest that the proposed sensor is potentially capable of detecting liquidsolid phase changes in other materials whose thermo-optic properties are similar to those of n-octadecane.

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