Need help with Hydroplaning Simulation Research

Hello all! I am a new user and first time user of Simscale, i am using it for my school research.

  • My Project is my Research that involves Simulating Hydroplaning with different tire tread patterns and road statuses. It’s using Incompressible as a Simulation type.

  • Here are the error messages i have encountered that i need help resolving

    “Please ensure that all CAD entities are assigned a material or advanced concept. Missing material or advanced concepts were detected for the following entities:”

    “Multiple bodies with material assignments were detected. Because this is a single region simulation, only a single body may be assigned a material. Please review your material assignments and leave only the flow volume with a material.”

  • I don’t know how to share the link of my Project since i am using the free plan. It is called “Flat road test” by RESEARCH05

You are probably trying to simulate a fluid with the flow region overlapped with solid grometry, try and using the edit geometry option to delete the solid geometry from the flow region!

Any “Easy” rated external flow tutorial here on the site will show you how to delete geometry from flow region.

Hi,

Please refer to this tutorial for the usual workflows, in particular when it comes to the first section, related to CAD preparation.

Cheers

1 Like

Perhaps, the following information will be helpful.
The simulation domain for a fluid dynamics simulation is the region occupied by the fluid (gas or liquid). Generally, the CAD model does not specify this fluid region. The user should manually specify or extract the fluid region in a process known as the “Flow Volume Extraction”.

Perhaps, then, the issue is that there is more than one flow volume in your CAD model. In the top right corner of your project, click the tab under “Geometry”. Check to see how many bodies/volumes there are. For non-Conjugate Heat Transfer simulations, multiple bodies are not allowed, unless the additional bodies will be used as advanced concepts. (Note: users define advanced concepts to model advanced flow characteristics such as rotating zones, power sources, and porous medium, which would otherwise require sophisticated geometries or large meshes.) This documentation page directly explains the reason for the error and the workaround: Error: Multi-Region Mesh in Non-CHT Simulation | SimScale

Perhaps, creating a fluid volume for your geometry is necessary. This documentation page/tutorial shows the steps to do so: How to Create Flow Volume Extraction? | Knowledge Base | SimScale

Note from the above tutorial,

Or, you can also see how to delete a body from this general documentation page: CAD Edit | CAD Preparation & Upload | SimScale