[StudentIB]

Hi,

I would like to simulate the cooling of tea in some FEA software. My goal is to obtain a plot showing the relations between time required to cool down a tea to specified temperature vs ambient temperature. Such graph could be very useful in real life. I would know how long my tea should be left outside to cool down depending on the current weather.

In this first approach I want to ignore flow of the air and simulate its effect using convective heat flux. My idea is as follows:
- cup with tea as 2D axisymmetric model
- initial temperature for the cup: 22°C
- initial temperature for the tea: 98°C
- convective heat flux on the upper surface of the tea: different ambient temperatures in the next cases, some heat transfer coefficient specified (can you tell me which value of h would be the best ?) Or maybe I should use temperature boundary condition with T = 90°C instead ?
- convective heat flux on the side of the cup: ambient temperature as above; any recommendations for this heat transfer coefficient ?

Here's how it would look like according to aforementioned settings:

https://imgur.com/a/o7FJgTn

So what do you think about such model ? It accounts for convection and conduction but omits evaporation. Any ideas how to add evaporation easily ? I would like to start from something simpler but when it works I can proceed to more advanced cases.

Thank you in advance for your help