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The line graph is step like although not oscillating, why?

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Hi, everybody

I got a line graph of the result when solve a PDE problem. In surprise, it is step like and the difference value of vertical axis is very small. why?

The jpg file is in the attachmen.

Thank you.

youf.


2 Replies Last Post 2010年10月30日 GMT-4 04:37
Ivar KJELBERG COMSOL Multiphysics(r) fan, retired, former "Senior Expert" at CSEM SA (CH)

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Posted: 1 decade ago 2010年10月30日 GMT-4 04:26
Hi

it depends I believe how you get the value, if it's a deriative of some other function you could get such result, or you have a coarse mesh and no interpolation in between, many thins can explain a step function

--
Good luck
Ivar
Hi it depends I believe how you get the value, if it's a deriative of some other function you could get such result, or you have a coarse mesh and no interpolation in between, many thins can explain a step function -- Good luck Ivar

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Posted: 1 decade ago 2010年10月30日 GMT-4 04:37
Hi, Ivar

Thanks for your help.

The problem occurs when the finer mesh has been used. But in surprise, The line graph turns smooth if the data is expored to the sofeware Origin. So I guess that some options should be setted in Comsol to satisfy the aim.

youf.
Hi, Ivar Thanks for your help. The problem occurs when the finer mesh has been used. But in surprise, The line graph turns smooth if the data is expored to the sofeware Origin. So I guess that some options should be setted in Comsol to satisfy the aim. youf.

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