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Can I measure relative humidity and temperature in Autodesk CFD 2017?

272 Views, 5 Replies
01/10/2018 7:19 AM

Hii to all,

We having a climet chamber model in which air is  being cooled through the first section to the point where water should leave the air in the chiller section. It is then re-heated before it reaches the outlet and added moisture in it.So can I simulate this model to get data of relative humidity and temperature at inlet and outlet section in Autodesk CFD 2016 and comapre this data to the actual model?I have attached line diagram for better understanding.
Thanks and regrads,

Parth. 

ATTACHMENTS:
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Message 1 of 5 ( Views: 272 )

Re: Can I measure relative humidity and temperature in Autodesk CFD 2017?

01/11/2018 3:48 PM

Hi @parth9586,

 

Thanks for reaching out to us on the forums! I am not sure we can model the level of detail you want. We have a humidity module, but it is primarily used for identifying areas of potential condensation or air drying. 

 

You mention that air would be cooled to the point of condensation. I don't think we can do this. We could add humidity to a volume via an inlet flow BC coupled with a humidity BC- I've done this and have personal experience with it. 

 

Have you tried doing some simple testing on your own machine? For example, a while back I wanted to get more comfortable with the humidity module. I ended up just modeling humid air drying out over a hot block of metal. Here's a screenshot of the results. 

humidity.jpg

 

I hope this helps a little.

 

Thanks,



Matt Bemis

Technical Support Specialist


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Message 2 of 5 ( Views: 257 )

Re: Can I measure relative humidity and temperature in Autodesk CFD 2017?

01/30/2018 10:50 AM

Thanks Matt Bemis for your prompt reply. I have tried this simulation without considering the moisture content which helps me to see the pressure temperature and velocity plots for the given condition at different locations.If I got any further requirement of your suggestion I will sure ask you in the future.Thanks again for your work.

Thanks and Regards,

Parth Thakore.


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Re: Can I measure relative humidity and temperature in Autodesk CFD 2017?

01/30/2018 10:54 AM

Hi @matt.bemis,

Can you send me the simulation file so that I can see the boundary conditions and inputs that you have applied on heated plate.

 

Thanks and Regards,

Parth Thakore.


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Message 4 of 5 ( Views: 213 )

Re: Can I measure relative humidity and temperature in Autodesk CFD 2017?

01/30/2018 1:56 PM

Hi @parth9586,

 

Nice to hear from you. I built this in CFD 2018, and CFD is not backwards compatible. So this would require me rebuilding it which I don't really have time for right now. I'll explain my setup.

 

boundary conditions:

Inlet: velocity = 15 in/s, temp = 70 F, Humidity = 0.5 (relative humidity = 50%)

chip = total heat generation = 500 Watts

outlet = 0 pressure gage

initial conditions:

On the entire control volume:

temperature = 70 F

humidity = 0.5

 

Make sure to use "Moist Air" instead of normal air and set it to variable. Also, enable the humidity solver via Solve>Physics>Advanced>Humidity.

 

 

Thanks,

 

 

 



Matt Bemis

Technical Support Specialist


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