Why is crude oil refined into only three grades for vehicles (heptane, octane, and "diesel")?
Actually a lot more components are used. Heptane and octane are just reference points for the "quality", specifically normal-heptane and a specific iso-octane (2,2,4-trimethylpentane). The mixing of...
ahh... I forgot: if the inlet - outlet temperature difference of the tubular furnace is significant than you must recalculate the temp dependent properties of the gas and everything depending on them for the segments.
For some reason I can't see the picture with the used formulas, so some guidelines in general for solving it with minimal software background:
- You need to calculate the heat transfer properties (e.g.: h.t.coef.)
- choose a small length fraction and calculate heat transfer assuming that the gas...
There are too many "unknowns" to give a good answer. The fluid is some kind of homogeneous mist or the liquid is in bigger droplets? How turbulent is the flow? Is it a straight pipe line? Is there any liquid segregation? Ect...
Maybe if you share more data or the reason why do you need the...
