METAL HOLE FILTER WITH KNOWN HOLE AREA: How to estimate the temperature (T2) on the other side if I know on one side (T1) . I want to get this from the pressure drop (P2-P1) I already calculated? The filter is rectangular ( a x b ) and the area free for the passage of area is S . The filter is inserted into a hot air stream of low velocity like 0,1 m / s ? I just need an estimate and not a very precise value In other words: how to convert pressure drop into temperature drop?