SMC or NSC

[Heming Chang]

Dear professors,
      If I want to study the effect of soil particle moisture content on the driving performance of tracked vehicles, choose SMC or NSC? How to choose? Thanks

[Dan Negrut]

Hi Heming,

This problem is something that we’ve never done in Chrono. In my mind, it’s a hard problem. It can be done, but it’d take some thinking and tinkering with the code.

Your best bet is to use the DEM code (https://github.com/projectchrono/DEM-Engine) and rely on the customizable inter-particle force model that is available therein. In other words, you can control how two particles in contact interact with each other, that is, what the interaction force for mutually interacting particle looks like. That callback function provides an avenue to introduce the particle moisture in the model.

You would run, for instance, a tracked vehicle using Chrono::Vehicle and co-simulate with the DEM code, which runs on the GPU. Which means that if you pursue this solution, you should have one GPU, and preferably two, available on your workstation.

Good luck with your project.

Dan

---------------------------------------------

Bernard A. and Frances M. Weideman Professor

NVIDIA CUDA Fellow

Department of Mechanical Engineering

Department of Computer Science

University of Wisconsin - Madison

4150ME, 1513 University Avenue

Madison, WI 53706-1572

608 772 0914

http://sbel.wisc.edu/

http://projectchrono.org/

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[Ruochun Zhang]

Hi Heming,

To follow up on Dan's comments. DEMdemo_WheelDPSimplified is one of the DEM-Engine's demos that show mesh/wheel--terrain interaction. The terrain that you'd like to model may be complex and you could benefit from storing the status of the simulation and restarting the simulation, and DEMdemo_GRCPrep_Part1 and 2 showcase that. As for soil particle moisture, you probably need to use your own particle force model, and DEMdemo_Electrostatic is an example. A couple of other interesting custom force model files are in src/kernel/DEMUserScripts.

Also, DEM-Engine is available in Python. Please refer to its README.md document.

Thank you,

Ruochun