CurvedBend
EdgedBend
Flow models for bends
Extends from Modelica.Icons.VariantsPackage (Icon for package containing variants).
| Name | Description |
|---|---|
| CurvedBend
|
Curved bend flow model |
| EdgedBend
|
Edged bend flow model |
Modelica.Fluid.Fittings.Bends.CurvedBendCurved bend flow model
This component models a curved bend in the overall flow regime for incompressible and single-phase fluid flow through circular cross sectional area considering surface roughness. It is expected that also compressible fluid flow can be handled up to about Ma = 0.3. It is assumed that neither mass nor energy is stored in this component. In the model basically a function is called to compute the mass flow rate as a function of pressure loss for a curved bend. Also the inverse of this function is defined, and a tool might use this inverse function instead, in order to avoid the solution of a nonlinear equation.
The details of the model are described in the documentation of the underlying function.
Extends from Modelica.Fluid.Dissipation.Utilities.Icons.PressureLoss.Bend_i (Icon for bend), Modelica.Fluid.Interfaces.PartialPressureLoss (Base flow model for pressure loss functions with the same area at port_a and at port_b).
| Name | Description |
|---|---|
| replaceable package Medium | Medium in the component |
| geometry | Geometry of curved bend |
| Assumptions | |
| allowFlowReversal | = true to allow flow reversal, false restricts to design direction (port_a -> port_b) |
| Advanced | |
| dp_start | Guess value of dp = port_a.p - port_b.p [Pa] |
| m_flow_start | Guess value of m_flow = port_a.m_flow [kg/s] |
| m_flow_small | Small mass flow rate for regularization of zero flow [kg/s] |
| Diagnostics | |
| show_T | = true, if temperatures at port_a and port_b are computed |
| show_V_flow | = true, if volume flow rate at inflowing port is computed |
| Name | Description |
|---|---|
| port_a | Fluid connector a (positive design flow direction is from port_a to port_b) |
| port_b | Fluid connector b (positive design flow direction is from port_a to port_b) |
Modelica.Fluid.Fittings.Bends.EdgedBendEdged bend flow model
This component models an edged bend in the overall flow regime for incompressible and single-phase fluid flow through circular cross sectional area considering surface roughness. It is expected that also compressible fluid flow can be handled up to about Ma = 0.3. It is assumed that neither mass nor energy is stored in this component. In the model basically a function is called to compute the mass flow rate as a function of pressure loss for an edged bend. Also the inverse of this function is defined, and a tool might use this inverse function instead, in order to avoid the solution of a nonlinear equation.
The details of the model are described in the documentation of the underlying function.
Extends from Modelica.Fluid.Dissipation.Utilities.Icons.PressureLoss.Bend_i (Icon for bend), Modelica.Fluid.Interfaces.PartialPressureLoss (Base flow model for pressure loss functions with the same area at port_a and at port_b).
| Name | Description |
|---|---|
| replaceable package Medium | Medium in the component |
| geometry | Geometry of curved bend |
| Assumptions | |
| allowFlowReversal | = true to allow flow reversal, false restricts to design direction (port_a -> port_b) |
| Advanced | |
| dp_start | Guess value of dp = port_a.p - port_b.p [Pa] |
| m_flow_start | Guess value of m_flow = port_a.m_flow [kg/s] |
| m_flow_small | Small mass flow rate for regularization of zero flow [kg/s] |
| Diagnostics | |
| show_T | = true, if temperatures at port_a and port_b are computed |
| show_V_flow | = true, if volume flow rate at inflowing port is computed |
| Name | Description |
|---|---|
| port_a | Fluid connector a (positive design flow direction is from port_a to port_b) |
| port_b | Fluid connector b (positive design flow direction is from port_a to port_b) |