Thank you Aitor!!! My feeling is the axisymmetric formulation should be valid for any coordinate axis? In my model I have assigned gravity to the X coordinate which is the axis of the pipe. At this point I only have one phase in the pipe with no liquid/gas interface. The pipe without gravity has been calibrated with an analytical solution. I thought that I could simulate the effects of pipe inclination by manipulating the gravity vector rather than building a new geometry for each inclination.
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