| m_flow | Flow rate per pipe | kg/s | scalar | The total flow into the system is the sum of the flow rates for the nr. of inlet pipes. Used if `dploopcrit` and `flow_data` are not defined |
| m_flow | Total flow rate | kg/s | scalar | The total flow into the system is is equally divided between the sets of inlet and outlet pipes, with a negative value for the outlet flow. Used if `dploopcrit` and `flow_data` are not defined. |