This post involves dates and times so for reference I am making this post on Tuesday May 24th around 8:30am, all the times I reference are in EST. I am a senior in high school and am trying to run a CFD simulation of a Formula 1 car model that I designed for a research project. I followed this tutorial to setup my simulation, making a few changes to fit my model. I was able to run it for the first time on Sunday May 22nd at around 11:00. It failed part way through due to divergence, the error message recommended increasing mesh resolution. I had not set the location and size of my mesh refinement boxes correctly. I have now modified the refinement boxes and re generated the mesh. I have tried many times to run the simulation again but keep getting the error shown below.
I have tried many runs on Monday: at 8:30pm, 10:20pm, 11:20pm. I also tired to run it at 8:15am on Tuesday. I need to have this simulation run by the end of Wednesday the 25th, the earlier the better.
Is there a time that commonly allows Community account members to run simulations of this size? I learning CFD for the first time with this project. Could I reduce the size of my simulation significantly enough to let me run it, and what would be the best way to do this? My project does not require a high degree of accuracy from the simulation, I would just like to be able to make a few general statements about the car’s performance. Do I have any other options for getting this simulation run? Thanks for any help.
Welcome to the forum, on this occasion, I’m have the same issue as yourself, not being able to run my simulations for the last day or so.
I have had the same issue of not being able to run my simulations, for a similar time period of over a day or so with my simulations unable to run, which have run before. I have reduced my mesh sizes & simulation run time, but continue to receive the same message as yourself, not more than a couple of minutes ago.
Several weeks ago this issue of unavailable resources also occurred and generally it gets resolved after a day or so under the free community licence. I expect Simscale will resolve the issue when they come online.
In terms of your model, the mesh size of 7.8M cells & run time of 1,000s there shouldn’t generally be a issue. But the mesh is getting a little big. I’ve run simulations with meshes of over 10M cells and over 2,500 seconds, but it does chew up core hours.
Can I suggest, while waiting for Simulation time to become available you search the Simscale Documentation area as I know there are a few publications that identify a few adjustments that can be done to F1/Car models and the simulation environment to reduce mesh sizes and improve output results.
I’ve been able to commence my Simulation which has 5.2 million cells for 500s and its 35% completed, so I think you may be able to start your simulation thanks to Simscale and the freeing up of sever computing for the free community licence.
I spent some time catching up on a few interesting areas around Simscale documentation and projects, so all the best to you & happy simulating