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Thermal Conductivity Measurements of aluminum oxide nanofluids by 3ω-method (CAT#: STEM-PPA-0035-WXH)
Introduction
Suspensions of nano-sized solid particles in a liquid medium, known as nanofluids show remarkable enhancement in thermal conductivity compared to the base fluid. Nanofluids are a promising candidate for advanced heat transfer applications such as microelectronics cooling.
Alumina (Al2O3) is the most common nanoparticle used by many researchers in their experimental works. Many efforts have been made to study the thermal conductivity of nanofluids.
Principle
The process involves a metal heater applied to the sample that is heated periodically. The temperature oscillations thus produced are then measured. The thermal conductivity and thermal diffusivity of the sample can be determined from their frequency dependence.
Applications
Determining the thermal conductivities of bulk material (i.e. solid or liquid) and thin layers
Procedure
1. Sample preparation and mounting
2. Experimental condition setting
3. Experiment start: Turn on the 3ω signal generator and lock-in amplifier, and control the temperature controller to make the sample temperature reach the set value. When the sample reaches a stable state, data acquisition and processing begin.
4. Data processing
2. Experimental condition setting
3. Experiment start: Turn on the 3ω signal generator and lock-in amplifier, and control the temperature controller to make the sample temperature reach the set value. When the sample reaches a stable state, data acquisition and processing begin.
4. Data processing
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