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Sliding mesh for translational relative motion between solid and fluid

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Old   September 23, 2015, 15:42
Default Sliding mesh for translational relative motion between solid and fluid
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shashank mishra
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Hello everyone,

I am trying to model a moving train in a low pressure tunnel.
The train is moving at some finite speed and at inlet, I know total pressure of wind.
In order to simulate, the transnational relative motion between solid (train ) and fluid ( air ) zones, I tried using sliding mesh technique.
After creation of interfaces, I imposed a certain x velocity to the solid zone.

Since, I have total pressure at the inlet as a known quantity, I cannot simulate with imposing train velocity to air in opposite direction ( as would have been done in wind tunnel) as this will changed the total pressure.

I have used sliding mesh before for rotating case but this time when I tried with a very basic geometry ( a box immersed in fluid ), it didnt work.

So, does it mean that I need to use dynamic mesh and specify cg motion for solid zone to simulate this problem.

Attached is an image for mesh motion which is totally absurd.

Thanks
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File Type: jpg FFF-Setup-Output.jpg (177.6 KB, 32 views)
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Old   December 27, 2019, 10:50
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Pallavee Dhekne
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Have you solved your problem? I am also facing same issue. Does sliding mesh works for translational motion of solid in fluid ?
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dynamic meshing, fluent 14 to fluent 15., sliding mesh

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