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[Moving Mesh] application mode
Posted Jan 5, 2010, 8:20 a.m. EST 1 Reply
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Hi,
I want to know why Moving Mesh application mode has only static and transient analysis types. I am using the static one in my frequency response problems and it seem to work fine. But, when should I use the transient analysis type? Why there is no freq. response analysis type for this mode.?
Can someone also explain what does constraint type (Ideal, Non-ideal) and weak constraints stand for ? By default Moving Mesh comes with non-deal constraint type as opposed to other physics modes.
Thanks in advance,
1 Reply Last Post Jan 5, 2010, 9:54 a.m. EST
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Posted:
1 decade ago
Hi
the best reference for me is the modelling.pdf doc, there are a few explicit examples therein too (v3.5a), this is an important but delicate chapter (i.e. weak, ideal versus non-ideal)
Now concerning your ALE and harmonic, I suppose there is no harmonic development there because ALE is first of all used for flow and not oscillatory analysis.
Basically the difference between transient (time variable) and harmonic (frequency e xpansion) is that the latter is in the Fourier space and you give the PSD (power spetral density) frequency response of your signal instead of the time responses.
If you take a structural model an you look at the variables and equations that COMSOL uses when you change your physics from transient to harmonic and then to static (Physics Equations Subdomain) you see better what COMSOl is doing internally.
Hope this helps
(for a complex subject, absolutely worth studying in details, this is the specific strength of COMSOL)
Ivar
the best reference for me is the modelling.pdf doc, there are a few explicit examples therein too (v3.5a), this is an important but delicate chapter (i.e. weak, ideal versus non-ideal)
Now concerning your ALE and harmonic, I suppose there is no harmonic development there because ALE is first of all used for flow and not oscillatory analysis.
Basically the difference between transient (time variable) and harmonic (frequency e xpansion) is that the latter is in the Fourier space and you give the PSD (power spetral density) frequency response of your signal instead of the time responses.
If you take a structural model an you look at the variables and equations that COMSOL uses when you change your physics from transient to harmonic and then to static (Physics Equations Subdomain) you see better what COMSOl is doing internally.
Hope this helps
(for a complex subject, absolutely worth studying in details, this is the specific strength of COMSOL)
Ivar