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electromagnetic simulation in transient with ansys 13.0

  • Thread starter Thread starter Catan
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Catan

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Hello everyone, I am a doctorate of the faculty of roma physics, to wisdom.
I worked on the realization of a particle silicon tracker for the jlab12 experiment and after years to simulate with pspice they recommended the passage to ansys workbench or to solidworks.

the choice on wb is relapsed by the fact that the university has the licenses for wb 13.0.
for now I have made the model of the very simple detector (a layer of aluminum thick 10 um put through a gold point to 70v, a bulk of silicon from 300 um and another layer from 10 um of aluminum put to 0 v).
now using electric I managed to implement this model, using data engineering I have inserted the right materials of my detector.

the underlying problem is that I can only do stady-state simulations, that is static simulations, where obviously the software does what I expect from the theory, that is one face goes to 70v and the other to 0, with the shaving within it from 70v to 0v (the silicon if though drugged n, remains always an insulator, so there are no areas of short and therefore there is a similar distribution)

the problem is that the ultimate simulation really is to make some small surfaces to imply with a signal of 200 na for the duration of 40ns on the area placed at 0v (a very gross value of charge released from a particle), and to check if these "impulses" generate "disturbs" on the plane place to 70v. (to simplify the speech is the stone effect in the stango, I throw a rock and I see the waves that propagate and what they put to disappear)
in case there are "disturbs" to the equipotentiality of the plan (it is not said since there are 300 um of silicon between the two floors), check how long these are reabsorbed (technically if I have many particles and the plan is not equivalent, I could have a difference of revelation between particle and particles and not have a uniform gain).

That is, I must be able to do simulations in the transient or transient and not in the static.

Unfortunately I have serious difficulty finding this function, in the menus I found a transiet structural and a transient thermal, but they are things for now I do not need (perhaps the transient thermal but speaks in the future).

if someone can give me a hand, while telling me if actually wb 13.0 does electrical simulations in the transient (I hope you see the completeness and cost of the simulator), maybe posting me some guidance of a similar job (I looked for several tutorials but I found nothing. ).

I'm sorry if I look unexperienced, but you know what kind of media has Italian research, so the only support I've had was a copy of the program, all the rest I'm learning from self-taught.

Thank you all!

fulvio
 
bye,
my advice if even banal is that address you to the assistance ansys, I for example use enginsoft of padova . regarding your specific problem I would not be able to help you .
 
solution already followed with a very courteous and detailed answer.
Unfortunately, like all companies have to make money, and they told me that in version 13 it is not possible to do it, but only with version 14.
 
Hello Catan,

I actually believe that the workbench platform does not have (at least from graphical interface) the possibility of doing transient analysis of electrical and electromagnetic type.
I have done some electroamgnetism many years ago using classic ansys (now called ansys mapdl), both with static analysis, harmonics and also transient.
with an extra effort you can use classic ansys and get everything you want (hope!). I can try to give you some tips: the classic ansys learning curve is more challenging but will give you nice satisfaction.
 
Hello Catan,

I actually believe that the workbench platform does not have (at least from graphical interface) the possibility of doing transient analysis of electrical and electromagnetic type.
I have done some electroamgnetism many years ago using classic ansys (now called ansys mapdl), both with static analysis, harmonics and also transient.
with an extra effort you can use classic ansys and get everything you want (hope!). I can try to give you some tips: the classic ansys learning curve is more challenging but will give you nice satisfaction.
I understand.

In fact from the support mail of the ansys group, the answer of the commercial has been discounted, while the one of the in has been more complete. Basically he mentioned me to 3 programs, but never to workbench, so I'm waiting for his answer to understand whether these 3 are included in the wb suite, or I have to make an offer to purchase these programs.
Unfortunately not being a private, I have to understand well what to ask me to approve the funding, since it is the lease of 12 months that the full suite does not cost little.
 
Three programs? and what would they want you to buy? Recently ansys acquired ansoft electromagnetic analysis software but I don't know if you actually need it.
if I am so long you should have an ansys type license "multiphysics", which allows you to do structural, thermal, fluid dynamic and electromagnetic analysis, even coupled with each other, both in static, harmonic and transient.
so unless you have special needs you already have what you need.
Of course, it's a tool with a graphical interface and a slightly dated usability, but I guarantee you make a mountain of robe.
 
your directions seem to be aligned to those exits from ansys.

I'll take you back a glimpse of the mail here:

the fem ansys mechanical solutor developed over time by incorporating the possibility of doing even electromagnetic fem analysis for high and low frequency through the emag module. the complete product we called it ansys multiphysics. I confirm from now on that in version 14 of ansys multiphysics you can do analysis of transient phenomena.

I will probably go to see if we have a license (if we have a multiphysics probably is a version 13) or eventually we should ask for a lease or purchase of this version 14.
 
Then I'll tell you about the situation.
as a license in the lab we had an ansoft maxwell 13 and after a week of study I managed to make the required geometry and the first step of the simulation.
in transient, 4 contacts in gold put us 5e-11 s to put a 10x10cm silicon brick at the equipotentiality of 70v of a face.

I came to the point where I thought I had mastered the problem, here is the other hitch, that is, phase 2, imply the surface with small current delta of the duration of 40ns and width of 200na.

i.e. I can assign excitement, but the value is fixed and not programmable (i.e. if simulus in transient for 500ns the impulse itself will be 200na but along the 500ns of the simulation).

Does anyone have any "tip" to give me in this situation?
 
Sorry but Maxwell I don't know anything at all. I doubt that on cad3d you can find help.. .
 

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