Hi, I'm just following up on my message here. On Thursday, May 9, 2024 at 2:00:49 PM UTC-7 Prabhat Paudyal wrote:
> Thank you Ruochun for letting me know. One more thing: when can we expect > to see the demo script of the Goldenberg test example in the repo? I don't > think it is there. > > Thanks, > Prabhat > > On Tuesday, April 30, 2024 at 5:26:15 AM UTC-7 Ruochun Zhang wrote: > >> Hi Prabhat, >> >> It's published and can be found here >> https://www.sciencedirect.com/science/article/pii/S001046552400119X?via%3Dihub >> >> Thank you, >> Ruochun >> >> On Wednesday, April 3, 2024 at 3:27:46 AM UTC+8 [email protected] wrote: >> >>> Hi Ruochun, >>> >>> Thank you so much for your response. I would very much appreciate it if >>> you notify me once the paper gets published. >>> >>> Thanks, >>> Prabhat >>> >>> On Tuesday, March 26, 2024 at 3:29:16 AM UTC-7 Ruochun Zhang wrote: >>> >>>> Hi Prabhat, >>>> >>>> To answer your question: You probably see a warning in your output file, >>>> """" >>>> WARNING! At least one clump is initialized with a position out of the >>>> box domain you specified. >>>> It is found at 0.378, 0, 0.076383 (this message only shows one such >>>> example). >>>> This simulation is unlikely to go as planned. >>>> """ >>>> This is the problem. It appears that the points you sampled live in >>>> x∈[0, 0.4], but the x range of your simulation world is defined as >>>> something like [-0.25, 0.25]. This will make the particles to be >>>> initialized in unexpected locations, cause large initial penetrations, and >>>> then destabilize the simulation. I fixed the world size definition, and it >>>> seems to fix the problem. The extremely fine step size you are using is >>>> not >>>> necessary: The physics in this simulation is simple. >>>> >>>> By the way, in the upcoming paper about DEME >>>> <https://arxiv.org/abs/2311.04648>, we will include a Goldenberg test >>>> example, and provide the associated demo script. If you want, we can let >>>> you know when it is officially published. >>>> >>>> Thank you, >>>> Ruochun >>>> On Tuesday, March 26, 2024 at 1:41:58 AM UTC+8 [email protected] wrote: >>>> >>>>> Hello everyone, >>>>> >>>>> I have been trying to replicate the 2D Goldenberg et al experiment >>>>> <https://journals.aps.org/prl/abstract/10.1103/PhysRevLett.89.084302> in >>>>> DEME. It was replicated as a validation study for Chrono::GPU (as >>>>> described >>>>> in the 2021 paper <https://doi.org/10.3390/pr9101813>), so I figured >>>>> it could be easily done in DEME too. However, I am having some issues >>>>> with >>>>> generating particles and having them settle under gravity. I have been >>>>> using a nested for loop to generate the initial positions of particles >>>>> and >>>>> while I don't have any issues with the generation of positions (see >>>>> attached paraview screenshot), I encounter the excessive velocity >>>>> run-time >>>>> error while settling the particles under gravity. I have tried to >>>>> decrease >>>>> the step size, increase the box domain dimensions to eliminate boundary >>>>> effects, relax the physics (decrease the Young's modulus of the terrain), >>>>> and increased the initial safety distance of the particles to no avail. >>>>> >>>>> I have attached my code to this message and I have been modifying the >>>>> 2D ball drop demo. >>>>> >>>>> Thanks and regards, >>>>> Prabhat >>>>> >>>> -- You received this message because you are subscribed to the Google Groups "ProjectChrono" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To view this discussion on the web visit https://groups.google.com/d/msgid/projectchrono/ef24e2fb-b4da-4d00-80f7-d4d43911e394n%40googlegroups.com.
