Thermal conductivity measurement of fluids using the 3ω method (CAT#: STEM-PPA-0036-WXH)

Introduction

Thermal conductivity refers to how easily heat transfers between molecules. High thermal conductivity translates to high heat transfer, meaning the fluid will heat or cool quicker than one with low thermal conductivity.

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Principle Applications Procedure Materials Notes Related Products

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

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