I am trying to run a CFD analysis on a rear wing I have designed for a university assignment, however, when i import the model into simscale, the solid body behaves as two seperate entities and the simulation fails. it also does not allow me to create an enclosure around my model, however when my lecturer tries it, it works fine, is there something wrong with my simscale?
Hi, thanks for using the forum!
I made a copy of your project and was able to create the flow region with no issues, have a look:
Perhaps there is an issue with your workflow. Please follow the instructions given in this page:
Now when I set up the simulation, when i go to generate the mesh it says simulation not valid. i have followed the tutorial provided exactly. i assume it has something to do with my model but i cannot figure it out
Can you please share the exact error message that you received?
This is the error message I am receiving. I clicked generate mesh anyway but I do not think the mesh was correct.
Hi there CameronD21,
Welcome to Simscale, I see you had a missing wing in the original question posed & expected you may have solved the issue. As Iâve indicated in red, there is a toggle âeyeâ button which needs to be clicked âonâ to allow the wing feature to be seen. Donât worry, this was a common trap for me in the early days, just keep an eye on what is turned off/on at the right hand side of the screen.
Ok, the next thingâŚI donât think you have deleted your body from the simulation flow volume.
I know it sounds counterintuitive, but this is required to create the correct environment.
I looked at the Simscale CAD model and it needs to be transformed so that a simulation can be performed, but the model hasnât been deleted. You are halfway thereâŚgo back to the Simscale CAD environment and delete the Airfoil using BODY delete, as highlighted and then choose âExportâ.
This tutorial might be helpful, just ignore the initial import or the Simscale model and use your own but, donât forget to delete the the model in the Simscale CAD setup
This image from the tutorial shows the steps in the deletion of the model from the External Flow Volume. Make sure you use the menu item within âBodiesâ, donât use the âFacesâ
If you stuck again, let us know 
, we have all been down this road, good luck with the uni assignment.
Hi Ted,
thank you for taking the time to help me with this, thanks for your advice about deleting the body from the flow region, I did not know this. However when I am creating the topological entity sets, how do I select the whole spoiler like in the tutorial, it only allows me to select the individual faces of the body, i think this is the mistake i am making. Many thanks.
Hi CameronD21,
Thanks for the feedback and your question aboutâŚ
âhow do I select the whole spoiler like in the tutorial, it only allows me to select the individual faces of the bodyâ
Ok, when you are in the Workbench screen of Simscale (ie main screen of the project).
- This is my practice, Go to the top of the screen click onâŚthis âselect facesâ icon.
- Then hide the external flow volume by click & turn off the âeyeâ icon, so you can see your model.
- Click on the dotted square outline, to activate the âbox selectionâ
- Move your curser to an upper corner of the spoiler, hold down left mouse button & drag a square around the spoiler
- Click on the â + â symbol above the topological to enable create and label feature.
- Enter in your name for the new topological set say " spoiler" and click the âCreate new setâ
- You should then see a new topological entity called âSpoilerâ , & then you may have to click on the adjacent âeyeâ to see it.
Hopefully the above steps helps, the screenshots are of a disk of mine in an external flow volume, but think of this as your spoiler model. There are a few ways of selecting objects, Iâve just mentioned one way that works for me. Donât worry, it took me some time to get the idea. Just be careful that you only select your spoiler model and not any other faces of the external flow volume.
Again, have any problems, get back to me, sorry for the delay in responding.
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