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Cummulative Sum in Comsol

Posted 13 mars 2016, 10:06 UTC−4 Version 4.3b, Version 4.4, Version 5.0, Version 5.1 2 Replies

Nhan Nguyen
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Is it possible to achieve (within comsol) a cumulative sum of a time varying data.
Can I use SUM in Comsol to implement that ?

Any suggestion will be appreciated !

Best regards,
N. N
2 Replies Last Post 14 mars 2016, 10:34 UTC−4
Gunnar Andersson COMSOL Employee

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Posted: 8 years ago 14 mars 2016, 03:23 UTC−4
Is it possible to achieve (within comsol) a cumulative sum of a time varying data.
Can I use SUM in Comsol to implement that ?


You can achieve this by adding an ODE: Suppose that you want to compute the cumulative sum (integral) of f(t). Then add the ODE d(fsum,t) = f(t). The ODE can be global or distributed.


[QUOTE]Is it possible to achieve (within comsol) a cumulative sum of a time varying data. Can I use SUM in Comsol to implement that ?[/QUOTE] You can achieve this by adding an ODE: Suppose that you want to compute the cumulative sum (integral) of f(t). Then add the ODE d(fsum,t) = f(t). The ODE can be global or distributed.
Nhan Nguyen
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Posted: 8 years ago 14 mars 2016, 10:34 UTC−4
Hi Gunnar,
Thanks a lot for your help !

Best Regards

N.N
Hi Gunnar, Thanks a lot for your help ! Best Regards N.N

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