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

Calculation of pressure loss in edged bends with sharp corners at overall flow regime for incompressible and single-phase fluid flow through circular cross sectional area considering surface roughness.

There are larger pressure losses in an edged bend compared to a curved bend under the same conditions. The effect of a sharp corner in an edged bend on the pressure loss is much larger than the influence of 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_edgedOverall_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_edgedOverall_MFLOW(IN_con, IN_var, dp)

IN_con	Type: dp_edgedOverall_IN_con Description: Input record for function dp_edgedOverall_MFLOW
IN_var	Type: dp_edgedOverall_IN_var Description: Input record for function dp_edgedOverall_MFLOW
dp	Type: Pressure (Pa) Description: Pressure loss

M_FLOW	Type: MassFlowRate (kg/s) Description: Output for function dp_edgedOverall_MFLOW

2014-12-02 Stefan Wischhusen: Changed transition regimes for laminar to highly turbulent domain.