Thermal characterization and analysis of microliter liquid volumes using the three-omega method

2015 ◽  
Vol 86 (2) ◽  
pp. 024901 ◽  
Author(s):  
Shilpi Roy-Panzer ◽  
Takashi Kodama ◽  
Srilakshmi Lingamneni ◽  
Matthew A. Panzer ◽  
Mehdi Asheghi ◽  
...  
Keyword(s):  
Thermal Characterization ◽  
Omega Method ◽  
Three Omega Method

End Effects in the Three-Omega Method to Measure Gas Thermal Conductivity

2009 ◽  
Vol 30 (3) ◽  
pp. 833-850 ◽  
Author(s):  
E. Yusibani ◽  
P. L. Woodfield ◽  
M. Kohno ◽  
K. Shinzato ◽  
Y. Takata ◽  
...  
Keyword(s):  
Thermal Conductivity ◽  
End Effects ◽  
Omega Method ◽  
Three Omega Method

scholarly journals Sensors for Thermal Characterization of Solid and Liquid Samples by 3-Omega Method

Proceedings ◽  
2018 ◽  
Vol 2 (13) ◽  
pp. 883
Author(s):  
Kestutis Grigoras ◽  
Aapo Varpula ◽  
Corinna Grosse ◽  
Daniel May ◽  
Mohamad Abo Ras ◽  
...  
Keyword(s):  
Porous Silicon ◽  
Thermal Characterization ◽  
Back Side ◽  
Silicon Chips ◽  
Liquid Samples ◽  
Omega Method ◽  
3 Omega ◽  
3 Omega Method ◽  
Glass Chips

Microchips have been designed and fabricated for the fast thermal characterization of samples by extension of the 3-omega method. Both solid and liquid samples can be measured by applying a small amount of material under investigation on the chip containing a micro heater/sensor. Two types of chips have been fabricated and tested: silicon chips with porous silicon (PS) layer as thermal isolator and glass chips with through glass vias (TGVs) for the back side contacting of the top side heater/sensor.

scholarly journals Thermal Conductivity of Nano-Crystallized Indium-Gallium-Zinc Oxide Thin Films Determined by Differential Three-Omega Method

Nanomaterials ◽  
2021 ◽  
Vol 11 (6) ◽  
pp. 1547
Author(s):  
Rauf Khan ◽  
Michitaka Ohtaki ◽  
Satoshi Hata ◽  
Koji Miyazaki ◽  
Reiji Hattori
Keyword(s):  
Thin Films ◽  
Thermal Conductivity ◽  
Zinc Oxide ◽  
Indium Gallium Zinc Oxide ◽  
Crystalline Materials ◽  
Omega Method ◽  
Indium Gallium ◽  
Α Al2o3 ◽  
Three Omega Method ◽  
Thermal Conductivities

The temperature dependence thermal conductivity of the indium-gallium-zinc oxide (IGZO) thin films was investigated with the differential three-omega method for the clear demonstration of nanocrystallinity. The thin films were deposited on an alumina (α-Al2O3) substrate by direct current (DC) magnetron sputtering at different oxygen partial pressures ([PO2] = 0%, 10%, and 65%). Their thermal conductivities at room temperature were measured to be 1.65, 1.76, and 2.58 Wm−1K−1, respectively. The thermal conductivities decreased with an increase in the ambient measurement temperature. This thermal property is similar to that of crystalline materials. Electron microscopy observations revealed the presence of nanocrystals embedded in the amorphous matrix of the IGZO films. The typical size of the nanocrystals was approximately 2–5 nm with the lattice distance of about 0.24–0.26 nm. These experimental results indicate that the nanocrystalline microstructure controls the heat conduction in the IGZO films.

Measuring the Thermal Conductivity of Flowing Liquid Samples Using the Three Omega Method

2012 ◽  
Vol 134 (9) ◽  
Author(s):  
Jonggan Hong ◽  
Dongsik Kim
Keyword(s):  
Thermal Conductivity ◽  
Boundary Layer ◽  
Circular Tube ◽  
Dimensionless Number ◽  
Flowing Liquid ◽  
Omega Method ◽  
Wave Technique ◽  
Momentum Boundary Layer ◽  
Three Omega Method

The thermal conductivity of a liquid is generally measured under conditions that suppress bulk flow in the sample. However, in situ measurement of the thermal conductivity of a flowing liquid would be useful in various scientific and engineering applications. This work demonstrates that a thermal wave technique, such as the three omega method, can effectively measure the thermal conductivity of flowing liquid if the frequency range is adjusted such that the thermal boundary layer is sufficiently thinner than the momentum boundary layer. A new dimensionless number was defined to assess the convection effects, and a criterion for thermal conductivity measurements was obtained for water flowing in a circular tube.

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