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Tutorial of DEM Simulation using LIGGGHTS: Complete Workflow of a screw conveyor particle simulation
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- Опубліковано 5 сер 2024
- www.engineerdo.com
This Video shows the complete workflow of a Discrete Element Method (DEM) Simulation using the open source software LIGGGHTS. The tutorial shows a simulation of a screw conveyor.
The following parts are contained:
Work Flow and desired programs: 0:25
CAD Modeling and STL Export: 1:15
LIGGGHTS Script Explanation: 3:20
Post Processing by Paraview: 8:05
Animation: 9:18
That's such a valuable content! Thank you very much! I'll try in the next days to model a chute with a conveyor, I'll let you know.
Hey Pedro, thanks for your feedback. We are looking forward to see your results :)
thank you for your hard work
Hey pain rikosu, thanks for your comment. You are welcome.
Thanks for such great videos...you are amazing...!
Thanks Charith, for your feedback!
Such hard work sir and thanks
Your welcome
Thank you for this great tutorial. Also a tutorial on how to install liggghts from scratch in an Ubuntu machine would be amazing. Cheers!
Noted
The .liggghts file cannot be opened in paraview. I tried to open the .liggghts ext group both in paraview 5.1 and paraview 5.6, but to no avail. I cannot install the LPP in ubuntu as well. What should be done?
thank you for ur hard work can you make a video about calculating granulars electric charge with friction or electric field thank you
hey pain, thanks for your comment. This sounds interesting. We havent focused on this topic yet, but might be a new challenge. We note it on the list for upcomming tutorials
Thanks for the great video!
I was wondering, could we calculate loss of material (lets say, loss of material because it stucks in the conveying machine) with this simulation?
Thanks in advance!
Hey Achmad, for sure we can :)
In Paraview you can define regions and slices. Here you could define some regions along the screw and calculated the number of particles and therefore also the mass of the particles.
On the other hand you can do similiar in liggghts. One option might be:
1) Create some circle stl files, which have the cross section of the pipe and place them along the pipe. The you use the command "fix massflow/mesh command" like shown in the manual:
www.cfdem.com/media/DEM/docu/fix_massflow_mesh.html
On the other hand you can also define some regions along the pipe and measure the mass inside each region:
@@engineerdo6568 Thank you so much! I will try to figure it out later. I found this channel so helpful. Please keep doing outstanding works!
Thank you for teaching this open source software to the public. I managed to successfully install LIGGGHTS-PUBLIC after watching your installation video. After which, I followed your first silo tutorial and this second screw conveyor tutorial, where both of them are working. I would like to ask if your website is still doing training webinar for LIGGGHTS-PUBLIC?
Hey Andy, yes we do. We can write you an offer for a training.
@@engineerdo6568 Thanks for the reply! I have sent you an email earlier asking how payment is normally made to you? Credit card?
Really cool I was searching for something for solving my problem, but Rocky DEM or EDEM is very expensive. I already used Paraview for lattice boltzmann method in university. Would you like to share the files maybe to use and modify for my problem?
Hey SK, thanks for your comment. We will upload the tutorial and the data, like script and the stl files at the end of the week on our website: www.engineerdo.com
@@engineerdo6568 Hey, thank you. I already taked a look on your website, very interesting. I taked the script there from the first tutorial and modified it for my screw conveyor, it all works fine. So you helped me already :-). Do you have any experiences with non-spherical particle, ist this possible with public-version.
I have used the same script as in this tutorial but the particles are not rotating along with the conveyor screw. What will be the problem? The particles are just falling down and creeping through the bottom. Can you please suggest a solution
Hey Sambhu, you are right. Thanks for the feedback.
We upload a script with a different mass to fill in. To increase the level of filling change the mass to be inserted:
variable fillmass equal 40 #kg
Cheers Engineerdo
Could we have a tutorial on ow to install LIGGGHTS on Windows?
Thank u for the tutorial. From where i can find the script of this simulation?
Hey @Sambhu, thanks for the feedback. Usually you will find the tutorial and data on our website www.engineerdo.com .
But it seems that we forgot to upload the post for the screw conveyor tutorial. We will upload the data this week. Thanks for the reminder.
Update: www.engineerdo.com/2020/09/19/dem-tutorial-2-screw-conveyor/
Why Young modulus units is N/mm^2 in your script? Is it right? 1e7 N/mm^2 is 10000GPa. In what units is Young's modulus measured in LIGGGHTS if I use the SI system?
Haha. That's wrong. The units are wrong. Sorry. It's "Pa"
Hi @EngineerDo, How did you simulate liggghts in windows and don't ubuntu?
Hey Rambusneves, it possible to compile liggghts in windows. However, we don’t use it in windows. Ubuntu should be faster...
@@engineerdo6568 I'm trying to do the simulation Snippet - DEM Tutorial 3: Particle Segregation in a Rotating Drum, when arriving at 2000 steps the simulation isn't changing same I let 24hours on.
where can I find the first tutorial?
Hey, you can find the first tutorial here: ua-cam.com/video/bCfCpjNuSVQ/v-deo.html
How can I intsall LIGGGHTS for windows os.
Thanks
Hey Semmana Oualid, windows os is a very uncommon platform, as far as my knowledge reaches. The compilation of Liggghts on windows is not easy in general. I would you suggest to install ubuntu on your computer. That will make things a lot easier.
Thank you again, sorry last question. I have on my laptop virtual box in which have installed Ubuntu 16.
Is that enough to install the software on it. According to the performance.
@@studentemail8067 Basic simulation are no problem with you set up. I fear, industrial scaled problems will take a bit more "cpu power" .