Hello,
I am implementing heat transfer for granular media. I need to set two different temperatures: one for the boundaries(stl file) and another for the particles.
Is there any tutorial that can help or any other suggestion?
Thanks in advance,
Clara
mschramm | Wed, 07/21/2021 - 18:27
See wall/gran
Hello,
When declaring fix wall/gran, you can set the temperature.
fix zwalls all wall/gran model hertz tangential history primitive type 1 zplane 0.15 temperature ${T0}
https://www.cfdem.com/media/DEM/docu/fix_wall_gran.html
Clara | Thu, 07/22/2021 - 11:40
Thank you for your reply!
Basically, I am performing a simple simulation for particles inside a heated cube. I want to obtain the temperature evolution of the particles due to particle-particle collisions and particle-wall collisions.
Even with adding a different temperature for the boundary, the problem is I am obtaining a constant temperature...
fix walls all wall/gran model hertz tangential history rolling_friction epsd2 mesh n_meshes 3 meshes cad1 cad2 cad3 temperature 800.
fix heattransfer all heat/gran initial_temperature 300
When dumping the temperature f_Temp[0], I am having a constant temperature of 300.
Do you have any suggestion?
Thank you again,
Clara
Daniel Queteschiner | Mon, 07/26/2021 - 11:31
primitive vs mesh wall
From the manual (cf. https://www.cfdem.com/media/DEM/docu/fix_wall_gran.html )
"For wallstyle mesh, the value for the temperature given in this command is ignored and the temperature value is specified per mesh via fix mesh/surface. "