Temperature gradient

:rofl:When I used the plug-in to simulate the indoor temperature gradient, I set the condition that the winter heating ,simulation object was a large space of 10,000 square meters and 18 meters high

:blush:Figure 1 is the result of my simulation

:stuck_out_tongue:Figure 2 shows similar results of CFD simulation by other software (not an object is simulated)

:grimacing:One of the questions is why did MY simulation result in a uniform temperature change in the vertical direction which is a little bit out of line with the actual situation .Because the actual temperature change is probably not that uniform :cry:

:star_struck:is it a problem with the accuracy of my meshing? I want someone who knows the answer to help me out

No, it’s because the Honeybee legacy comfort maps aren’t a point-in-time CFD simulation. They are an extrapolation of the timeseries EnergyPlus results to a higher spatial resolution. This allows you to account for a lot of things that CFD can not like the change in temperature conditions over long spans of time like a whole year. However, this means that the comfort maps use simpler methods to account for air stratification, which assume that air temperatures in the horizontal plan are the same.