4 Replies Latest reply on Jul 18, 2012 3:26 AM by Yash Bhaskar

Unable to get any variation in temperature for Joule Heating Effect?

Yash Bhaskar Jul 12, 2012 10:14 AM

I am working on a heater coil where the input is the current and my aim is to check the rise in temperature. I am using the SWX Flow Sim (Electronics Module) to calculate the rise in temperature based on the Joule Heating concept. But unable to get any variation in temperature and I don't know why? I will be glad if anyone can just help me with this. I have attached an image and the SWX file with the study setup of an small coil for further reference.

Regards,

Yash

spring.SLDPRT.zip 257.0 KB

Re: Unable to get any variation in temperature for Joule Heating Effect?

Reid Sorensen Jul 13, 2012 10:21 AM (in response to Yash Bhaskar)

Yash,
What material are you using for the coil? What are your inputs and where have you placed them? What goals have you specified for the study?
-Reid
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- Re: Unable to get any variation in temperature for Joule Heating Effect?
  
  Yash Bhaskar Jul 13, 2012 10:50 AM (in response to Reid Sorensen)
  
  I have used Copper. Current is the input for me at the end faces of the springs. Goals were solid temperature, fluid temperature and joule heat etc. I believe you can find my study step in the part file attached in my last post. Kindly go through it see if you can anything?
  -Yash
  
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  - Re: Unable to get any variation in temperature for Joule Heating Effect?
    
    Reid Sorensen Jul 13, 2012 11:36 AM (in response to Yash Bhaskar)
    
    Yash,
    We haven't upgraded to 2012 yet so I am not able to open your file. I did however throw together a rough model based upon the image you posted above. I ran the study and I was able to get some reasonable results. I have attached the file. What gauge copper wire are you using and how many amps are you driving through the wire? If you have a reasonably thick copper wire you're going to need a lot of current to generate much heat. The study I did used a .062" dia wire with 10 amps applied to it and I only got a temp rise of 14C. I hope this helps.
    -Reid
    
    Yash.SLDPRT.zip 453.0 KB
    
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    - Re: Unable to get any variation in temperature for Joule Heating Effect?
      
      Yash Bhaskar Jul 18, 2012 3:26 AM (in response to Reid Sorensen)
      
      Hi Reid,
      
      Thanks for your time and concern. With the example provided by you I was able to figure out the problem in my study was with the meshing. I was not getting the right amount to solid cells in my model in my initial attempts and the second point of yours about the right ratio of thickness and the current applied is also an important aspect to take care of while running these kind of studies.
      
      Best Regards,
      Yash
      
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