backflow total temperature?

rachid

In my model, i expect a flow outside through the pressure outlet BC. There is a negative pressure on this BC so ı put -15 Pa gauge pressure. (Not zero this time)

But there is an interesting result. When i open the velocity vectors graphics, a flow which is almost parallel to the Pout BC (reversed flow)where i expect the out flow.

From my documents i found out that this can be overcome by using the backflow total temperature option.

So how do i set it up? My operating conditions are as follows:

Pop=101325 Pa Top= 300 K g=9,81 m/s2

My inlet conditions are:

Vin= 1m/s Tin= 400 K

Outlet conditions are:

Pout= -10 Pa (Gauge pressure) Backflow total temp=300 K (??)

Thanks and good work to you all...