[TharunSK]

I have a model of an octagonal room with a machine tool in it. The initial air temperature inside is 34 °C . The inlets have static temperature of 15°C and transient simulations are performed to observe the cooling process. For a rough approximation, I use time steps of 0.5s and total time is 60s. Now, I observe some weird results. The temperature graph on a point inside the air domain (not on machine tool ) shows the starting temperature as 15 °C and increases to 17°C in 60s, even though I had initialized the domain with 34°C and this is a cooling operation.

Please comment on the following:

1. Why is the starting temperature not somewhere near 34°C on the graph?
2. Why is the temperature increasing from 15 when actually it should cool down from 34 to 15.

[Gert-Jan]

Usually this is not a problem. So, either your initial guess is wrong or your monitoring point is in the wrong location, or...... Could be anything

[ghorrocks]

Please attach your Output file and an image of what you are modelling.