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Pigging Analysis

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Old   January 30, 2020, 04:50
Post Pigging Analysis
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Hello,
I am new to Ansys Fluent and given the assignment to analyze Pig motion in a pipeline. The pipeline is around 2000m long and Ansys and Solidworks cannot make that length of the pipeline, so how would you suggest to go for the boundary conditions to analyze this issue I am adding a document too from you can understand what I am asking.

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Old   January 30, 2020, 06:50
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The scenario is rather involved and would require Fluid-Structure Interaction. However, with assumptions that the cups are rigid and the pig always moves in a straight line along the pipeline, you can use rigid body solver along with moving mesh in Fluent to simulate it. Boundary condition can be velocity inlet and pressure outlet. Since fluid is liquid, pressure at outlet can be 0 Pa (gauge).

Another option is to use CFX with its IB method. It would not require any moving or deforming mesh. But this is not scalable, i.e., you will not be able to extend it to the option of deforming cups.
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Old   January 30, 2020, 06:58
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Hi Vinerm,
I hope you have looked upon the images that I have attached to my query. Actually the fluid is natural gas not liquid. The inlet and outlet conditions are also mentioned. The thing I am not understanding is how can I add boundary conditions to the 2000m long lines end if I cannot model it in the software?

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Old   January 30, 2020, 09:28
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There are no such limitations in the system. We have modeled snow avalanches on mountains using Fluent over the areas of 20 km x 20 km.
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