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Rotating wheel MRF regions

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Old   July 13, 2022, 15:16
Default Rotating wheel MRF regions
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Ethan gabriel campbell
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Hi, I have recently been trying to set up a simulation for the rotation of a wheel. For the tyre, I am using a rotating wall. For the rim, I am looking to produce an MRF region.

When setting up the geometry I created two subtracts of the geometry

Subtract 1) Rim spokes from the rotating section, producing the region of rotation.

Subtract 2) Tyre and region of rotation from the fluid domain. This was going to be the stationary region.

The creation of these two subtracts meant that they each shared an interface. The issue is that when meshing, there is a failure to orient a face due to self-intersections with this face being the interface within the rotating region. Does anyone know how to solve this issue ?

Many thanks
Ethan
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Old   July 17, 2022, 22:05
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Quote:
Originally Posted by EthanC View Post
When setting up the geometry I created two subtracts of the geometry

Subtract 1) Rim spokes from the rotating section, producing the region of rotation.

Subtract 2) Tyre and region of rotation from the fluid domain. This was going to be the stationary region.
Looks like (2) should be done first.
Otherwise subtracting region of rotation from the fluid domain - you get rim spokes there (since it is was subtracted from the rotating section) in the fluid domain.

Anyway: right-click fluid domain and/or rotating part (in Parts) and "Repair Surface" - that would help to diagnose the issue.
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Old   July 18, 2022, 10:53
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Quote:
Originally Posted by cwl View Post
Looks like (2) should be done first.
Otherwise subtracting region of rotation from the fluid domain - you get rim spokes there (since it is was subtracted from the rotating section) in the fluid domain.

Anyway: right-click fluid domain and/or rotating part (in Parts) and "Repair Surface" - that would help to diagnose the issue.
Thank you for your response. With regards to the surface repair tool, when I click it, it takes me to another display. Should it carry out the repairs automatically or does it require manual user input?

Many thanks
Ethan
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