Forgive the pen-name. I created this account long, long ago and can't seem to figure out how to change it.
I am doing some flow analysis for heat loss and flow profiles on a commercially available helical coil tube-in-tube liquid/gas heat exchanger.
Wow that was a mouthful.
If you couldnt follow that... just click on this. http://sentry-equip.com/Public/BrochuresandDataShee/DTC17.1.pdf
I am modeling a "Series 4" but have truncated the model to 4 coils vs. 16.
Well my mass and volumetric flow rates are super small and have been too low for even the vendor to spec out a total length that I need.
So I am trying to do a part level analysis and will later plan on doing a full system analysis too.
Well, now I am not only having SUPER slow CPU time, but I am getting some high mach errors which is rather curious.
Admittedly the size of the tubing may be oversized for the flow rates (programmatic decisions beyond my control), but I cant imagine that this is the culprit.