I am new in Simscale, I don’t know much about it. I am trying to create an internal flow volume using the closed inner region flow volume extraction for the airflow analysis inside a bus that i am currently working on. My CAD model was created with Autodesk Inventor 2017. I am getting an error saying “A closed region could not be created. Please make sure to cover all openings with boundary faces” when i try to create a flow volume extraction as shown in the attached image.
I created an enclosure around the trailer. Notice that the fluid volume isn’t restricted to the outside, which indicates the trailer isn’t completely closed.
I couldn’t find the gaps. That way, I chose to delete all windows and doors. So, instead of using the closed inner region, I used the open inner region. You can see the results below:
Could you please share with me the edited version of the CAD Model that you did without windows and doors? If possible, please make it in a step (.stp) or part (.ipt) format so that i can be able to open it in Autodesk Inventor? I tried downloading the .x_t one on the project but i am not able to open it in Inventor (it gives me an error).
I need it for another simulation where i will assemble it with other parts.
](https://www.simscale.com/workbench/?pid=9096602946013873155&mi=operation%3A38%2Cgeometry%3A37&mt=GEOMETRY_OPERATION!%5BCapture%7C690x375%5D(upload://3dwNVQOJ480ORI1kC31s9zhJqmZ.jpeg)){kind=link}