This information is part of the Modelica Standard Library maintained by the Modelica Association.

Calculation of pressure loss in a straight pipe for turbulent flow regime of an incompressible and single-phase fluid flow only considering surface roughness.

Generally this function is numerically best used for the compressible case if the pressure loss (dp) is known (out of pressures as state variable) and the mass flow rate (M_FLOW) has to be calculated. On the other hand the function dp_turbulent_DP is numerically best used for the incompressible case , where the mass flow rate (m_flow) is known (as state variable) in the used model and the corresponding pressure loss (DP) has to be calculated. See more information.

M_FLOW = dp_turbulent_MFLOW(IN_con, IN_var, dp)

IN_con	Type: dp_turbulent_IN_con Description: Input record for function dp_turbulent_MFLOW
IN_var	Type: dp_turbulent_IN_var Description: Input record for function dp_turbulent_MFLOW
dp	Type: Pressure (Pa) Description: Pressure loss

M_FLOW	Type: MassFlowRate (kg/s) Description: Mass flow rate