What is the fastest portable method to cool a hot drink?

Call on 29th Nov: brainstorming on possible topics I suggested the topic of creating a human powered device (straw creating fine bubbles) to cool a hot drink. We can then compare this against other methods.

Call on 7th Dec: research plan finalized the research question, constraints are good explained about the parts of the research plan do other things in parallel: get materials, do small scale experiment proposed setting up a research journal/diary team requested for a second call in the week, I proposed Friday 10:30 to 11:30

Call on 10th Dec: are there simulation software?

• not that I know of but I did not do the research. difference small scale and actual experiment?
• small scale is to get some practical experience, real experiment need to control for many factors uniformity of temperature at the start may be difficult for anything other than 100 degree celsius experiments are to get feedback on the device and to figure out how to improve it need to do several iterations to develop the device impact beyond a drink?
• look for other applications of cooling liquids

Call on 14th Dec: use spoon to whip air into the drink found some simulation software Energy2D and Energy3D

• might take more time to build the model than to do the exp.. at least 2 rounds of exp
• round 1: test out initial ideas and baseline methods
• round 2: improve the best method from round 1

Call on 17th Dec: come up with hypothesis/questions and experiments to test them come up with prototypes based on results of first experiments use the same rate of flow of air for blowing/aeration measure the room temperature

Conclusion, aeration is one of the most effective. Takes 7mins to cool from 85°C to 55°C.

We can use Newton’s law of cooling to find the coefficient of heat transfer.

24th Feb 2022 Make it to the SSEF final judging. Need to produce video for public, quad chart and presentation for judges

Audio in the video is bad, seems to be a bit too fast and there is a lot of noise.

Perhaps some ideas of why aeration + vertical stirring is the best? It was mentioned why metal blocks are bad, but it would be more interesting to give some hypothesis of why the good methods are good.

Slide 2 has very long text, try to shorten and use simpler more direct language.

Remove underline from slide titles.

The position of the slide title is not consistent.

Slide 8 the top white box cuts the text.