Learning Forum

[Rob]

If this is your first model I recommend doing the tutorials first - multidomain and multiphase models aren't trivial. Combining the two even less so. 

If a domain is sealed you'll need to use ideal gas. Fluent conserves mass but if the volume changes may lose mass to satisfy the volume reguirements. 

I'd expect agar to be a fair bit more viscous than water otherwise it'll run down the insides of the dish. From setting fire to some at Uni (biochem module: tip, Chemical Engineers will follow instructions about putting glowing hot wires into alcohol as we know what will happen) I don't remember it moving much. So you may want to rethink that mixture. You'll also find it'll move if it's a fluid so things get a bit more complicated. 

You can use patch to add materials/phases to regions. That also works for temperature. So, you can initialise the whole domain as (for example) air, and then patch in the agar fluid, temperature and vapour fraction as needed. That may get a little complicated so I'd consider domain with just a single dish floating in space to work out all settings.