I am having an issue with flow simulation in regards to a time dependent thermal study. I am basically looking for the cooling time of a liquid in a sealed chamber. The fluid would begin at room temperature and I have a cold condition on the outside of the box walls. The simulation runs and I can see the temperature drop but when I go to "time dependent" in general settings the simulation temperature never drops (I need to be able to determine cooling time of liquid to -40 to estimate test down-time.) I have an outer wall condition on the aluminum box @-40C. I am assuming this is a simple sim to run and I must just be missing something very basic but I can't figure it out after hours of messing with settings etc. Can anyone point me in the right direction? Thanks in advance.