Heat Transfer in a duct? 2

[grkerrigan]

Hi,

I'm looking for simple equations govering flow through a duct with heat transfer. I'm looking for pressure and velocity with varying geometry and heat transfer rates. Nothing too complex at this stage.

Thanks in advance,

Gordon.

 

[Sparweb]

I spent 3 months in Thermodynamics class learning how to deal with that.....

Steven Fahey, CET

 

[Aerohandel]

A Compressible Flow text will have what you need (not thermo text).

Have your library get a copy of Saad, Compressible Fluid Flow. Use the influence coefficients chart on page 281. Set up the differential equations. Numerically integrate with Matlab, making vectors containing your desired thermodynamic properties along the length of the duct. Make it print some nice plots, show your boss.

I would also suggest adding frictional effects. These are important and are not hard to add once you get the hang of the influence coefficients chart.

What is this for? What types of velocities are you dealing with? Is it airflow? Do you need to consider flow choking or shock waves?

Let me know if I can be of more help.

 

[grkerrigan]

Thank you Areohandel, very helpful. I'll definitely try to get a hold of that book.

This is just for something I'm playing with at the moment, not work.

The medium I'm looking at is just plain ol' air at relatively low velocities, ie up to around 100 m/s, so no shock waves and trying not to choke the flow.

You wouldn't happen to have already made up that MATLAB script have you???

Thanks,

Gordon.