Hi, do you know how to do validation in DEM software? I am new in ROCKY DEM. In case of Ansys Fluent, normally we use several parameters such as Residual Value, Conservation of Mass and Energy, Mesh Independency Test and Iteration test. How about DEM? Could you please inform it to us Thank you so much for your help and support

hello，can i get a tutorial of this video

Hi. Great work! One question for you. If we have a corn silo, could we be able to conduct the flow analysis of that case? What I want to say, every type of the grain(seed) has its own shape, cohesion, friction etc... Is it possible to model that with reliable results?

Hello, I'm having issues in the last part of the compling, when the command cfdemCompCFDEMall is executed, it does not works, says "command not found". What could possibly be? I also didn't installed the LPP, since the repository is no longer availabe in github. Thank you in advance for your attention

Hi, i want to model a real elavator that i had designed and got a problem Can you please help me?

what software is this?

Sir, We tried to install the software on our device but its showing error, and some commands as missing, can you please help us, because our final year project is mainly depends on this software. Please help us sir

Thank you for the tutorial. Would you know how to do this but instead with velocity measurements for let's say, a single particle or for all particles and then plot it over time? Thank you in advance!

What are the optimal angles?

Leider keine Kontaktdaten... Tja ich hätte eine grandiose Idee muss ich wohl mit wem anderen machen schade...

hi, first of all, thank you so much for being a big help on our way I want to ask whether this video is for Windows or Linux.

Hi, if someone could help me, im using lmp380 in the last step and doesnt show me an error but the command doesnt end. i have waited for an hour and nothing happend and its not like the virtual box is frozen or something, is just like the process never ends. Does someone know how i can fix it?

Would love to see the final results

I think I found the solution. This error occurs if "mpi.h" file is missing. I ran a sample code : #include <mpi.h> #include <iostream> int main(int argc, char** argv) { MPI_Init(&argc, &argv); std::cout << "MPI initialized successfully." << std::endl; MPI_Finalize(); return 0; } and saved it as "mpi_test.cpp" then After creating the mpi_test.cpp file, compile it with: mpicxx mpi_test.cpp -o mpi_test Run the compiled program to ensure MPI is working: mpirun -np 1 ./mpi_test You should see the output: MPI initialized successfully. After running this , I found the error : kanak@kanak-HP-ProBook-440-G6:~/Documents$ mpicxx mpi_test.cpp -o mpi_test mpi_test.cpp:1:10: fatal error: mpi.h: No such file or directory 1 | #include <mpi.h> | ^~~~~~~ compilation terminated. kanak@kanak-HP-ProBook-440-G6:~/Docu so I installed this : sudo apt update sudo apt install openmpi-bin libopenmpi-dev which eventually solved the problem.

How many cells did you use in your mesh?

Great video

Great job! The tutorials are so helpful. I have some questions for you about my simulation. Unfortunately, I couldn't find my answer in your tutorials. How can I contact you? It is so urgent, please help me.

how to download ffmpeg? i can see 3 types, File Size SHA-256 Checksum ffmpeg_4.4.2.orig.tar.xz 9.1 MiB af419a7f88adbc56c758ab19b4c708afbcae15ef09606b82b855291f6a6faa93 ffmpeg_4.4.2.orig.tar.xz.asc 520 bytes 9565fbabaf877939bbe48e80f04d424c02d4ce7be65a61d144c442658701f30e ffmpeg_4.4.2-0ubuntu0.22.04.1.debian.tar.xz 53.2 KiB d5d0c5e4156572a9d42c4c2de9e01384cae4fbcfe79c20dc239e88b24a4b2bb8 ffmpeg_4.4.2-0ubuntu0.22.04.1.dsc 5.5 KiB 88e095cbf427ef31661500eb656bac27b459682a36049cd603f16ea9b40a7b70 which one should i select

First of all, thanks kindly for the video. It's really helpful and well explained! I'm running into an issue that I can't seem to find the cause of. When I'm importing to paraView I get the following errors: ERROR: In vtkOpenFOAMReader.cxx, line 11323 vtkPOpenFOAMReader (0x609c34f65ba0): /home/usuario/Engys/HELYX-OS/v2.4.0/pipeSimulation/pipeSimulation.foam contains no meshes. ERROR: In vtkExecutive.cxx, line 740 vtkPVCompositeDataPipeline (0x609c3b254d70): Algorithm vtkPOpenFOAMReader (0x609c34f65ba0) returned failure for request: vtkInformation (0x609c2b265d30) Debug: Off Modified Time: 7921425 Reference Count: 1 Registered Events: (none) Request: REQUEST_INFORMATION ALGORITHM_AFTER_FORWARD: 1 FORWARD_DIRECTION: 0 ERROR: In vtkOpenFOAMReader.cxx, line 11323 vtkPOpenFOAMReader (0x609c34f65ba0): /home/usuario/Engys/HELYX-OS/v2.4.0/pipeSimulation/pipeSimulation.foam contains no meshes. ERROR: In vtkExecutive.cxx, line 740 vtkPVCompositeDataPipeline (0x609c3b254d70): Algorithm vtkPOpenFOAMReader (0x609c34f65ba0) returned failure for request: vtkInformation (0x609c2b265d30) Debug: Off Modified Time: 7921425 Reference Count: 1 Registered Events: (none) Request: REQUEST_INFORMATION ALGORITHM_AFTER_FORWARD: 1 FORWARD_DIRECTION: 0 Can you help me understand the cause of this issue? Thanks in advance, sir!

I just bought one of course, but I am not being able to access it, if you are seeing this then please give reply. I have emailed you from the mail id that i have given during purchase

Well done. One question, why not develope a GUI application to input those parameters to be set or edit automatically into the liggghts script? From where to download the windows version of LIGGGHTS? Thanks

How did you visualize the tip vorticies?

I have trouble to finish your tutorial - Fatal Errors appear. (rhoMin and rhoMax are no longer supported.) OpenFoam 11 - kubuntu 22.04 LTS "Create time Create mesh for time = 0 Selecting solver incompressibleFluid [1] [1] [1] --> FOAM FATAL IO ERROR: [1] Pressure limits should now be specified in fvConstraints: limitp { type limitPressure; } rhoMin and rhoMax are no longer supported. [1] [1] [1] file: IOstream/PIMPLE from line 0 to line 0. [1] [1] From function Foam::pressureReference::pressureReference(const volScalarField&, const volScalarField&, const Foam::dictionary&, bool) [1] in file cfdTools/general/pressureReference/pressureReference.C at line 59. [1] FOAM parallel run exiting [1] [0] [0] [0] --> FOAM FATAL IO ERROR: [0] Pressure limits should now be specified in fvConstraints: limitp { type limitPressure; } rhoMin and rhoMax are no longer supported. [0] [0] [0] file: /home/xxx/FOAM_RUN/Venturi/system/fvSolution/PIMPLE from line 16 to line 23. [0] [0] From function Foam::pressureReference::pressureReference(const volScalarField&, const volScalarField&, const Foam::dictionary&, bool) [0] in file cfdTools/general/pressureReference/pressureReference.C at line 59. [0] FOAM parallel run exiting [0] -------------------------------------------------------------------------- MPI_ABORT was invoked on rank 1 in communicator MPI COMMUNICATOR 3 SPLIT FROM 0 with errorcode 1. NOTE: invoking MPI_ABORT causes Open MPI to kill all MPI processes. You may or may not see output from other processes, depending on exactly when Open MPI kills them. -------------------------------------------------------------------------- [XXX] 1 more process has sent help message help-mpi-api.txt / mpi-abort [XXX] Set MCA parameter "orte_base_help_aggregate" to 0 to see all help / error messages " Any advice?

hi i have a problem while starting the simulation and it is related to the number of processors in files. how to reduce number of processors from 12 to 4? i have tried but still error thanks

can you please explain about setting number of processors for less than 12 processors? i cant run the simulation thank you

The laminar to turbulent transition at ~2300 is for flow in pipes, on a flat plate it is ~10^5.

hey after the chmod 777 comand I got this error: /home/senamoises/FluidisedBed/parCFDDEMrun.sh: line 26: parCFDDEMrun: command not found can you help me? thanks

I m getting this error, "mpirun was unable to find the specified executable file, and therefore did not launch the job. This error was first reported for process rank 0; it may have occurred for other processes as well." Could any one help me resolve this please.

I'm having that problem I get to much sand back after 110 tons per hour and overloading my motor

how to reconstructPar the multi processor data to visualise in paraview

how can i assign suction boundary in the outlets? Thanks.

Hi. Is it possible to contact you privately to see if you’re interested in trying something to do with racing cars? Ben

im not ssure helyx is free anymore i cant seem to get a hold of it without paying 2k

Dear EngineerDo, Is it possible to find the input of this simulation somewhere? Thanks a lot!

What if the buckets were not fixed but instead a swing and the contents were tipped?

Can I use the same procedure to simulate the binder jetting process?

Exactly what i was looking for

Thank you for the simulation. but it seems it has a specific agenda that is to prove Elon Musk wrong. Firstly Elon Musk never said CT drag coefficient is 0.3. He said: "with significant effort, the CT MIGHT achieve a drag coef. of 0.3". And he said that several years ago. Please be fair. Secondly, it would be very useful if you used the same simulation software to calculate the Cd for Ford F-150 Lightning, and a couple of other ICE trucks. Finally the Cd of CT truck reported elsewhere appears to be 0.36 and that value is obtained in a real wind tunnel. Ford F150 lightning has a reported wind tunnel Cd of 0.44.

could you please send me a link I can download dem software

could you please tell me which software used for making this video?.................................................................................................................

Dear engineerdo, I would like to do a simulation similar to yours, however my drum has smaller dimensions. When replacing the geometry files and applying the input from your model, the particles behave in a strange way, as if gravity were not acting, could you help me?

if you give me your gmail i can share my work I completed silo and air blower also make simulation but I cant give inside maize

could you please help me ...... I want to make grain like maize in solidworks also create simulation is it possible.?

Excellent faculty & i really appreciate whole heartiest such a great tech hero revolutionary faculty it is gr88 german scientist

Hello, I wanted to know if you can do a step-by-step tutorial on how to do the simulation since I am interested in developing a hopper and I would like to do flow type simulations according to my design measurements.

I m facing a problem. Could you please tell me. How do i resolve this. Makefile:461: *** 'Could not compile a simple MPI example. Test was done with MPI_INC="" and MPICXX="mpicxx"'. Stop. make[1]: Leaving directory '/home/M/LIGGGHTS-PUBLIC/src/Obj_auto'.

I really enjoyed this and would like to see the final results.

your missing One key aspect with the lifts, real world lifts have a slight negative (-5) tilt back on the top side to help dump more on the down stroke in to the funnel this will prevent items form returning at a much higher rate. I fix these for a living, its real trust me :) Think of it as a inverted drop roller coster

hi by which software did you analyse this model?

I can’t find source code for this tutorial