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Heat Pulse - Laminar Flow
Posted 21 juin 2017, 06:11 UTC−4 1 Reply
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Hi,
I have a relatively simple problem; however, I'm finding it hard to find the solution.
I have laminar flow in a pipe and want to have a pulse of heat at the inlet for 0.5 seconds, I then want to monitor this pulse for ten seconds with the pulse switched off.
I can not find a way to generate this pulse and have tried to do this through generating a pulse in definitions; however, am not able to implement this after into the heat transfer in fluids physics.
Help would be greatly appreciated.
Thanks
I have a relatively simple problem; however, I'm finding it hard to find the solution.
I have laminar flow in a pipe and want to have a pulse of heat at the inlet for 0.5 seconds, I then want to monitor this pulse for ten seconds with the pulse switched off.
I can not find a way to generate this pulse and have tried to do this through generating a pulse in definitions; however, am not able to implement this after into the heat transfer in fluids physics.
Help would be greatly appreciated.
Thanks
1 Reply Last Post 23 juin 2017, 02:21 UTC−4
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Posted:
7 years ago
Updated:
7 years ago
Thomas,
You may use a rectangular function.
1) Go to model1 -> definition -> functions -> rectangle
change the lower and upper limits as you desire (i.e. 0 s and 0.5 s).
2) Define a heat flux at the inlet as: Q_inlet*rect1(t[1/s])
To monitor the outlet, you may integrate the total heat flux (ht.ntflux) at the outlet after you solved the problem and plot it with time.
Amin,
You may use a rectangular function.
1) Go to model1 -> definition -> functions -> rectangle
change the lower and upper limits as you desire (i.e. 0 s and 0.5 s).
2) Define a heat flux at the inlet as: Q_inlet*rect1(t[1/s])
To monitor the outlet, you may integrate the total heat flux (ht.ntflux) at the outlet after you solved the problem and plot it with time.
Amin,