I created a new simulation project called 'Truck Simulation':
Aerodynamic simulation of the flow over a truck
More of my public projects can be found here.
I created a new simulation project called 'Truck Simulation':
Aerodynamic simulation of the flow over a truck
More of my public projects can be found here.
Hey @ksmody20,
Nice geometry, also looks quite clean (no detailed features that are not important for the simulation). Curious to see the results. If you need support during the mesh or simulation setup, I am happy to assist!
Best Alex
Hi @afischer,
Thank you for your offer. I am just trying out a few simulations on the platform.
Hopefully, it gets done smoothly.
But, I will definitely get back to you if I need some help with the setup
Cheers.
Kunal
Hey @afischer,
So I got stuck, sooner than later. I am facing some issues with the meshing process.
Here is the error I keep getting:
[4] --> FOAM FATAL ERROR:
[4] Cannot find triSurfaceMesh starting from “processor4/constant/triSurface/shell_0.stl”
[4]
[4] From function triSurfaceMesh::checkFile(const fileName&, const fileName&)
[4] in file searchableSurface/triSurfaceMesh.C at line 116.
I had given an IGES file as input.
Initially, I thought that my bounding box wasn’t defined correctly, but I am not sure where the error is pointing to now.
Would be great to have your help here!
Thanks,
Kunal
Hey @ksmody20,
there seems to be an issue with your IGES file. I created a ticket for that. I uploaded it as a step file again and that works fine then. Your model is not closed though, that means during the meshing the meshing algorithm meshes also inside of the truck (see the unclosed meshes in my project copy here: SimScale Login ).
I fixed that by running some cleaning operations on the model. Now it only consists of some solid parts (tires, chassis etc.). After that the meshing works fine (fixed geometry) in the project. Also boundary layers can be added easily. I just used the automatic meshing to create a very coarse mesh. You can/should adapt it to your needs.
Please tell me if you run into any more issues!
Best Alex
Thank you @afischer.
It seems like it is working fine with the clean up. I shall have a look at the original file too to see where it is open.
But thanks a lot. I shall get back to you if there is something else
Cheers,
Kunal
This project simulates the aerodynamics around a truck moving at 10m/s & 20m/s.
The cad project was obtained from grabcad.com and then it was cleaned up a little.
With the help of @afischer, further and necessary cleaning was achieved to correct any openness in the geometry.
A symmetry condition was applied to reduce the computational effort.
The simulation was setup for the k-omega-SST model where the values of k and omega were calculated using the standard approach based on the velocity and turbulent intensity.
The road was given a moving wall velocity equal to the expected speed of the truck.
The result includes a screenshot of the streamtracer around the Truck.
Update 2) 20 m/s
This is a very interesting simulation. Thank you.
I would like to simulate a very simple addition to the front of the trailer for a truck like this however, I currently lack the skills with Sim Scale or CAD to achievemy goal.
I know this project is 3 years old, but would either of you be interested to see if we can transform the preasure wave in front of the trailer and consequently see its effect on the low preasure zone on the back of the truck? I am certain that what I propose will not be complicated to prep for simulation if you have your skills.
Best Regards
John
Hi John!
Feel free to upload your CAD model and post your question along with some brief explanation about your project on the project support page and we will make sure that you receive help.
Best,
Jousef
Hi @afischer
I am trying to simulate a similar truck model and analyze the results. I would like to get some insight into CAD clean up and meshing for a complex geometry like this. Any help would be appreciated.
Thanks and Regards,
Pramodh