[lammps-users] Confusion about Atc method!

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1

Dear all

I have read the manual of fix atc command( like a hundred times) and the reference papers.

But I still have many questions.

  1. What do the three types-thermal, two_temperature, hardy indicate?

  2. To my understanding, the atc is responsible to perform the FE calculations, but it’s not parallel( i.e.

only one cpu used) according to the manual. Is it possible to couple lammps with other FE software like

Ansys?

  1. Is there other stuff that can help understand the atc package better?

  2. How to generate a cool figure with both atoms and FE meshes like this one http://lammps.sandia.gov/doc/fix_atc.html

Thank you so much!

2

Hello there,

Here are some answers but your questions are quite vague. I suggest you start with some of the example input decks and try to modify them for your problem of interest. If you have specific issues with those, they will be easier to address.

3

Hi Kunshou, please retain the lammps mailing list in your replies. Can you please post the input deck you have used that caused problems? I can then see if I can reproduce the error, but if paraview can read it, then it is likely an ensight issue. BTW, I find ensight produces nicer looking plots and has more powerful functionality for probing the data, but paraview is lighter weight and faster.

With regards to your question, the 'transfer' keyword is helpful to us for parsing of the input deck. As our code has grown, other keywords are also used more, and you should see that in our next two releases.
Jeremy

4

there is also a tool that comes with ensight that vets data files called
something like "ens_checker90" that can be useful.

5

Hi

Both of the AtC commands Thermal and Two-temperature concentrate on thermal conduction problems, in which the deformation of the FE meshes are not considered. If so, can AtC package be used to solve deformation problems, crack problems and other mechanical problems?

Thanks!

Happy new year!