Hello,
I'm quite new to Elmer but I've read a lot of posts in this forum.
So I was able to simulate the thermal behavior of some simple objects.
Now I want to simulate a pcb with 4 layers and a hand of elements.
To create this I use Salome that works fine for me.
My question is now, how can I say Elmer that one inner layer is just filled 35% with copper?
Thanks in advance
Thermosent
Simulation of a PCB with several layers
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Re: Simulation of a PCB with several layers
Hi,
which material is the remaining 65 %?
Is it a mixture or are there areas with copper and areas with "non-copper"?
Matthias
which material is the remaining 65 %?
Is it a mixture or are there areas with copper and areas with "non-copper"?
Matthias
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- Posts: 4
- Joined: 05 Mar 2018, 10:58
- Antispam: Yes
Re: Simulation of a PCB with several layers
Hi Matthias,
the given 35% copper is an estimatet value.
It sums up the area used by the conductor lines in a given area (but is just an example).
The remaining 65% is an isolation material.
So there are areas with copper and areas with non-copper.
Thermosent
the given 35% copper is an estimatet value.
It sums up the area used by the conductor lines in a given area (but is just an example).
The remaining 65% is an isolation material.
So there are areas with copper and areas with non-copper.
Thermosent
Re: Simulation of a PCB with several layers
Hmmm...
If it does matter where the copper and non-copper areas are, you should model them with the geometry.
If not, you could use averaged material properties.
HTH,
Matthias
If it does matter where the copper and non-copper areas are, you should model them with the geometry.
If not, you could use averaged material properties.
HTH,
Matthias
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Re: Simulation of a PCB with several layers
Thank you for this hint!
The average value should be ok for first trials with multilayer pcb's.
I just thougth there is a parameter where I can set such features.
Is there a possibility to set environmental conditions?
E.g. I know just the values of ambient temperature and all component dissipations (and of course all materialfeatures).
Where can I set the ambient temperature and do I need further boundary conditions?
Or do I have to build an additional casing so that I can assign ambient temperature?
In my case I don't know any temperature on the pcb.
Thermosent
The average value should be ok for first trials with multilayer pcb's.
I just thougth there is a parameter where I can set such features.
Is there a possibility to set environmental conditions?
E.g. I know just the values of ambient temperature and all component dissipations (and of course all materialfeatures).
Where can I set the ambient temperature and do I need further boundary conditions?
Or do I have to build an additional casing so that I can assign ambient temperature?
In my case I don't know any temperature on the pcb.
Thermosent
Re: Simulation of a PCB with several layers
Hi,
you can set the external temperature and a heat transfer coefficient in the boundary conditions, and the heat disspation as body force.
HTH,
Matthias
you can set the external temperature and a heat transfer coefficient in the boundary conditions, and the heat disspation as body force.
HTH,
Matthias
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- Posts: 4
- Joined: 05 Mar 2018, 10:58
- Antispam: Yes
Re: Simulation of a PCB with several layers
Hi,
I started a simulation with the settings Matthias has told me.
And so far it works.
Now I have created the PCB including components and put it into a case. (in Salome)
Is there a possibility to inspect the inside of the case?
The simulations result looks good, but if it is possible I would like to have a look at the components on the PCB.
Maybe there's a function to set the case in a transparent mode in ElmerVTK...
Best regards,
Thermosent
I started a simulation with the settings Matthias has told me.
And so far it works.
Now I have created the PCB including components and put it into a case. (in Salome)
Is there a possibility to inspect the inside of the case?
The simulations result looks good, but if it is possible I would like to have a look at the components on the PCB.
Maybe there's a function to set the case in a transparent mode in ElmerVTK...
Best regards,
Thermosent
Re: Simulation of a PCB with several layers
Hi,
in ParaView (recommended for postprocessing), you can make cuts through your geometry . You can also selectively display bodies, IIRC using a threshold filter on geometry IDs.
I never use ElmerVTK, so I don't know anything about its capabilities.
HTH,
Matthias
in ParaView (recommended for postprocessing), you can make cuts through your geometry . You can also selectively display bodies, IIRC using a threshold filter on geometry IDs.
I never use ElmerVTK, so I don't know anything about its capabilities.
HTH,
Matthias