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

Calculation of pressure loss in curved bends at overall flow regime for incompressible and single-phase fluid flow through circular cross sectional area 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_curvedOverall_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_curvedOverall_MFLOW(IN_con, IN_var, dp)

IN_con	Type: dp_curvedOverall_IN_con Description: Input record for function dp_curvedOverall_MFLOW
IN_var	Type: dp_curvedOverall_IN_var Description: Input record for function dp_curvedOverall_MFLOW
dp	Type: Pressure (Pa) Description: Pressure loss

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

2014-12-01 Stefan Wischhusen: Introduced an expansion in variables v_lam and v_tra for numerical improvement at close to zero flows.
2014-12-12 Stefan Wischhusen: Factor A2 corrected for R/D > 0.55-0.7. The factor is now 6e3 instead of 4e3.