functiondp_edgedOverall_MFLOW

Pressure loss of edged bend | calculate mass flow rate | overall flow regime | surface roughness

Extends from Modelica.Icons.Function (Icon for functions).

Information

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 .

Inputs

TypeNameDefaultDescription
Modelica.Fluid.Dissipation.PressureLoss.Bend.dp_edgedOverall_IN_conIN_conInput record for function dp_edgedOverall_MFLOW
Modelica.Fluid.Dissipation.PressureLoss.Bend.dp_edgedOverall_IN_varIN_varInput record for function dp_edgedOverall_MFLOW
SI.PressuredpPressure loss

Outputs

TypeNameDefaultDescription
SI.MassFlowRateM_FLOWOutput for function dp_edgedOverall_MFLOW

Revisions

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