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April 10, 2017, 02:02 |
Sub - Domain Energy Source
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#1 |
Senior Member
Join Date: Apr 2014
Location: Melbourne
Posts: 584
Rep Power: 14 |
Hi Guys,
In my model I have domains, sub-domains, initializations, interfaces and equations. I have been using domains by providing Energy values (W/m3) in Sub-domains and solving my model. Is it possible to give fixed value of temperature(K) to sub-domains? so rather than calculating the temperature distribution in sub-domain based on losses, it just knows what the temperature will be of that particular sub-domain? The only option it gives under Sources is Energy and cant choose any other equation sources. Thanks for help in advance Cheers KAPI |
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April 11, 2017, 19:13 |
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#2 |
Super Moderator
Glenn Horrocks
Join Date: Mar 2009
Location: Sydney, Australia
Posts: 17,703
Rep Power: 143 |
Use a source term to pull the temperature to a determined value. Here's how: constant temperature heat source in subdomain
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April 17, 2017, 19:18 |
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#3 |
Senior Member
Join Date: Apr 2014
Location: Melbourne
Posts: 584
Rep Power: 14 |
Hi Glenn,
I am trying to find the tutorial/example in documentation you mentioned but not yet successful. I read your comment but in my situation I have 500+ sub-domains and its not feasible to use equations for all of them unless I can create a table and somehow access it in each sub-domain. Cheers Kapi |
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April 18, 2017, 01:45 |
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#4 |
Senior Member
Join Date: Apr 2014
Location: Melbourne
Posts: 584
Rep Power: 14 |
I figured rather than creating sub-domains and giving equation for fixed temperature, I can just create boundary and give fixed temperature to wall/symmetry for each body.
Hope it helps someone Cheers KAPI |
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April 18, 2017, 01:49 |
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#5 |
Super Moderator
Glenn Horrocks
Join Date: Mar 2009
Location: Sydney, Australia
Posts: 17,703
Rep Power: 143 |
Modelling 500+ separate thermal areas is rarely a good idea. If you have so many then you should consider:
* a reduced order model, * combining regions into a small number of representative averages covering a number of individual sources * Modelling a single region and extrapolating that to the rest * Many other methods exist depending on the exact model you are attempting. |
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April 18, 2017, 19:45 |
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#6 |
Senior Member
Join Date: Apr 2014
Location: Melbourne
Posts: 584
Rep Power: 14 |
got no option Glenn sadly, Need to see thermal effect on each and every part because of the behavior of bodies.
I have tried everything you mentioned but the accuracy is reduced which is big No for my modelling. Have around 100 odd sub-domains in each domain (max of 5 domains), Normally I give losses in each sub-domain to see the thermal effect but I need to check the model with fixed temperature |
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April 18, 2017, 19:59 |
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#7 |
Super Moderator
Glenn Horrocks
Join Date: Mar 2009
Location: Sydney, Australia
Posts: 17,703
Rep Power: 143 |
Can you explain what you are modelling and what you are trying to learn?
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