Good morning, I am carrying out steam distillations with urea/water solutions on fresh rosemary, urea has a relatively low vapor pressure and in theory the vapors generated by this solution should be exclusively water. I got a yield per kg of 3ml EO which would normally be 0.7. Systems called deep eutectic solvents are likely to form between the essential oil/water/urea compounds. It was my intention to study the phenomenon with molecular dynamics, but I don't know which force field to use for the phase changes and the parameters (times, temperatures, etc.)

Curiosity: if you put a 50% water/urea solution in a beker, after a few days the urea recrystallizes coming out of the beker (see image)