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For which of these flows, periodic or cyclic boundary conditions are applicable?

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in Computational Fluid Dynamics by (118k points)
For which of these flows, periodic or cyclic boundary conditions are applicable?

(a) External flow over objects

(b) Swirling flow inside a cylindrical furnace

(c) Free surface flows

(d) Buoyancy driven flows

This question was addressed to me in final exam.

This interesting question is from Boundary Conditions in portion Boundary Conditions of Computational Fluid Dynamics

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Best answer
The correct option is (b) Swirling flow inside a cylindrical furnace

The explanation: While solving swirling flow inside a cylindrical furnace, if cylindrical coordinates are used, we can pair the boundaries and hence periodic or cyclic boundary conditions can be used.

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