- #1

Tsportmat

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## Homework Statement

Evening everybody. I am attempting to devise an experiment in order to measure the thermal diffusivity of ice and water.

Imagine 3 brass plates, with water held between them, in approximately a 1mm gap (dx) by surface tension.

The 3 plates have thermocouples between them in order to tell the difference in temperature between them. The part I am miffed about is how to obtain the diffusivity from this measurement.

I have been given this equation to link them, but I am struggling to find where it came from and the significance if the d

^{2}T/dx

^{2}

d

^{2}T/dx

^{2}=T

_{1}-2T

_{2}/dx

^{2}+T

_{3}

## Homework Equations

dQ/dT=-D dH/dx

## The Attempt at a Solution

This is not really appropriate, as the above is an experiment plan which I have devised, I just need the final link! I apologise for not using the exact format, but any ideas or leads for me to follow up would be greatly appreciated, I've come to a dead end.

Thankyou in advance.