I was wondering if anyone had any tips or best-practices for simulating internal recirculating flow with the CFD package. I'm optimizing a simple exchanger + peltier block for my heat transfer class, but no matter how I assign boundrary conditions I can't seem to get my fluid volume to flow.
So far i've tried the following approaches:
Let inventor export directly to CFD. CFD correctly detects and creates the internal surface.
Let inventor export to Fusion, cap all ports, assign mass flow BCs to each capped port with corresponding zero-pressure BCs on the outlet. Although this internal surface is segemented into many pieces instead of just one continous piece like the direct-export approach does.
Both approaches yield the same result wether transient or steady-state so i'm really scratching my head at how to proceed. I've checked the wiki but it doesn't seem to have much reference on how to best set BCs between parts.
I've attached an image of my current mass-flow BCs and the full assembly. This is using the second approach.
Either way, when evaluating the model CFD detects "0 inlets, 0 outlets, 0 unknown"
Solved! Go to Solution.
Solved by Royce_adsk. Go to Solution.
Solved by Royce_adsk. Go to Solution.
Sorry for taking so long to get back to both of you, I've attached the .cfz below.
Ah, thank you for the advice, and yes I am trying to emulate a closed system. I've read up on the documentation for the fan, and it looks like I would just designate one of my barbs as the fan/pump during the materials assignement phase?
Using the internal fan has fixed the problem. Just wanted to post this for anyone else who might have a similar problem to mine.
Is there any reason that we can't simulate a closed loop system?
Would it be possible to have the input = output with the input pressure/temperature/etc being set by the previous iterations calculated outlet pressure/temp/etc? Perhaps this outlet pressure could be applied to the inlet only after flow has stabilized, etc.
The internal fan/pump and heat exchangers seems a little kludgey for closed loop work...
Hi,
There is no method at the moment to have a outlet drive an inlet somewhere else in the model.
I have seen some great simulation with the heat exchanger and internal fans used for closed loop systems.
What do you consider 'kludgey' about the workflow?
-Royce
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