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Grid dependency study in building heat transfer |
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April 10, 2013, 14:20 |
Grid dependency study in building heat transfer
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#1 |
Senior Member
sunil
Join Date: Jul 2012
Location: Bangalore
Posts: 179
Rep Power: 14 |
Hello sir,
I am doing my M Tech Project on building heat transfer.i have considered single room of dimensions 4*4*4 m.i am applying heat flux to the walls heat flux is varying with time.i have to run my simulation for 24 hours(Total time = 86400 s) my question is for grid dependency study either i have to very both time step size and grid size(space and time) or any one of them is enough because it takes too much of computational time even for time step of 10 s to solve for given total time Results which i am interested are 1.Average room temperature 2.avg wall temperature Thank you sir |
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April 10, 2013, 17:17 |
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#2 | |
Member
Dmitry
Join Date: Nov 2011
Posts: 45
Rep Power: 14 |
Quote:
user54862_pic391_1340124620.jpg |
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April 10, 2013, 22:00 |
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#3 |
Super Moderator
Glenn Horrocks
Join Date: Mar 2009
Location: Sydney, Australia
Posts: 17,852
Rep Power: 144 |
This is why I strongly recommend using adaptive timestepping. Set adaptive time stepping to home in on 3-5 coeff loops per iteration, then yoru timestep is automatically calculated and you have one less variable to do a sensitivity analysis on.
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April 11, 2013, 03:10 |
Grid dependency
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#4 |
Senior Member
sunil
Join Date: Jul 2012
Location: Bangalore
Posts: 179
Rep Power: 14 |
Hello sir,
Thank you for reply. i will try to run solver with adaptive time stepping as you suggested Thank you sir Sunil Patil |
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April 11, 2013, 10:26 |
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#5 | |
Senior Member
Mr CFD
Join Date: Jun 2012
Location: Britain
Posts: 361
Rep Power: 15 |
Quote:
Where did you get the presentation from? What's the title of the presentation? Thanks |
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Tags |
building heat transfer, grid dependency, transient analysis |
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