2D axisymmetric model for concentric pipe.

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  • Last Post 19 February 2020
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jhur posted this 12 February 2020

HI!

I am modelling flow between two pipes(concentric pipe). Fluid flows only between the outer and inner tube. the space inside the inner tube would be just void. I would want to make 2D Axisymmetric model as shown in the figure that i uploaded. 

As the axis is not in touch with the inner tube wall. I can not select a geometry to set as axis boundary. So currently filled the void with a rectangle geometry and assigned mesh and then select the wall that is in touch with x axis as rotation axis. It seems not efficient as the mesh in void area is not necessary in calculation. Is there any method to make 2D Axisymmetric model like this without generating a goemetry or mesh in the void area?

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rwoolhou posted this 12 February 2020

In Fluent the axis is along y=0, there's no need to define it if there's no geometry at that location. You only use "axis" when the domain touches the y=0 line. 

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peteroznewman posted this 15 February 2020

In Mechanical Structural models, the Y axis is the axis of rotation for Axisymmetric models.

In Fluent, the X axis is the axis of rotation for Axisymmetric models.

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jhur posted this 18 February 2020

Thank you !! it works!!!

 

kkanade posted this 19 February 2020

Please mark this as 'Is Solution' to help others. 

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