In a 2D axisymmetric simulation, half of the domain is modeled and fluent calculates the "volume" of the domain rotating the 2D plane AROUND the axis. So, if we have an axi-symmetric pipe flow (a cylinder), we take the center line as middle axis and half of the cross-section as simulation domain.

Fluent calculates the cross sectional area, A = pi times radius squared

You can use ;

define -custom field function ,

to define any thenk for exemple A=pi* radius squared.

In a 2D axisymmetric simulation, half of the domain is modeled and fluent calculates the "volume" of the domain rotating the 2D plane AROUND the axis. So, if we have an axi-symmetric pipe flow (a cylinder), we take the center line as middle axis and half of the cross-section as simulation domain.

Fluent calculates the cross sectional area, A = pi times radius squared

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