modelRSrad
The bondgraphic radiative resistive source element
Extends from Interfaces.TwoPort (Partial model invoking two bondgraphic connectors).
Information
The bondgraphic radiative resistive source is a directed TwoPort element. It inherits the effort and flow variables from the directed TwoPort. The specific radiation constant and the rediating surface are modeled as parameters.The resistance, R, is inverse proportional to the square of the temperature at the inflow, T1 = e1.
The radiative resistive source element is to be used in radiation of thermal systems. The primary side of the radiative resistive source element is assumed to be in the thermal domain.
The resistive source element has free causality on the primary side, and fixed causality on the secondary side. The causality stroke is at the element on the secondary side (a source of entropy, rather than a source of temperature).
Potential variables: e1: Bondgraphic effort variable of inflow f1: Bondgraphic flow variable of inflow, normalized positive for flows into the model e2: Bondgraphic effort variable of outflow f2: Bondgraphic flow variable of outflow, normalized positive for flows out of the model R: Bondgraphic radiative resistance Parameters: sigma: Specific radiation constant (default value = 1 W/(m2*oK4) A: Radiating surface (default value = 1 m2)
Equations:
R = 1/(sigma*A*e1*e1)
e1 = R*f1
f2 = f1*(e1/e2)
Parameters
| Type | Name | Default | Description |
|---|---|---|---|
| Real | sigma | Modelica.Constants.sigma | Stefan-Boltzmann constant |
| Modelica.SIunits.Area | A | 1 | Radiating Surface |
Connectors
| Type | Name | Default | Description |
|---|---|---|---|
| BondLib.Interfaces.BondCon | BondCon1 (from TwoPort) | Left bond graph connector | |
| BondLib.Interfaces.BondCon | BondCon2 (from TwoPort) | Right bond graph connector |
Components
| Type | Name | Default | Description |
|---|---|---|---|
| Real | e1 (from TwoPort) | Bondgraphic primary effort | |
| Real | f1 (from TwoPort) | Bondgraphic primary flow | |
| Real | e2 (from TwoPort) | Bondgraphic secondary effort | |
| Real | f2 (from TwoPort) | Bondgraphic secondary flow | |
| Real | R | Bondgraphic Radiative Resistance |