Head loss, head rise, hydraulic gradeline and energy gradeline output does not have meaning for zero g systems
A Caution message in AFT Fathom
If the user sets the gravitational acceleration to zero presumably, for a space application, then the concept of head and gradeline lose meaning. This can be set in Analysis Setup on the Environmental Properties panel. For example see Equation 1 in Network Solution Methodology and see that a zero g will lead to a meaningless HGL.
Users should ignore all head loss, head rise, and gradelines displayed in the output and focus on pressure results.
