 Multi Radiation - MapleSim Help  Description

The Multi Radiation component models multiple Heat Radiations.

The total number of Heat Radiation components is determined by the $\mathrm{Nodes}$ parameter.

The following image is an example with Heat Radiation components to explain the behavior of Multi Radiation component. Radiation type Radiation geometry Use Correction input Constant - false or true External input - false or true General - false or true Use References Surrounded object false or true Two parallel plates false or true Two long concentric cylinders false or true Concentric spheres false or true

The following table is the image of radiation geometry when Radiation type is Use References.

 Radiation type Radiation geometry Use References Surrounded object Two parallel plates Two long concentric cylinders Concentric spheres (For details, see Heat Radiation help). Equations (For details, see Heat Radiation help). Variables (For details, see Heat Radiation help). Connections

 Name Units Condition Description Modelica ID $\mathrm{port_a}\left[i\right]$ i-th thermal port, a port_a[i] $\mathrm{port_b}\left[i\right]$ i-th thermal port, b port_b[i] $\mathrm{Gr__in}$ ${m}^{2}$ if Radiation type is External input. Input signal of the heat transfer coefficient Gr_in $\mathrm{cor}\left[i\right]$ - if use correction input is true. i-th input signal of the correction factor for ${Q}_{\mathrm{flow}}$ cor[i] Parameters

 Symbol Default Units Description Modelica ID $\mathrm{General}$  Select Type of Radiation  General : Use the generalized equation  Constant : Radiation conductance is constant  External input: Radiation conductance given by input  Use References : Use references for Radiation conductance TypeOfRadiation  Geometry type of Radiation. RadiationGeometry $\mathrm{Nodes}$ $2$  Number of node numNode $\mathrm{false}$  If true, Emissivity for Material 1 are defined by reference data use_reference_emissivity1 $\mathrm{false}$  If true, Emissivity for Material 2 are defined by reference data use_reference_emissivity2  Emissivity for Material 1 if Use references of emissivity  for Material 1 is true. TypeOfMaterial1  Emissivity for Material 2 if Use references of emissivity  for Material 2 is true. TypeOfMaterial2 $\mathrm{ε__1}$ $1$ Emissivity of object 1 on port a eps1 $\mathrm{ε__2}$ $1$ Emissivity of object 2 on port b eps2 $\mathrm{A__1}$ $1$ ${m}^{2}$ Surface area of object 1 A1 $\mathrm{A__2}$ $1$ ${m}^{2}$ Surface area of object 2 A2 $\mathrm{r__1}$ $0.1$ $m$ Radius of object 1, Inner r1 $\mathrm{r__2}$ $0.2$ $m$ Radius of object 2, Outer r2 $\mathrm{L__1}$ $0.1$ $m$ Length of object 1 L1 $\mathrm{F__12}$ $1$  View factor for Radiation F12 $\mathrm{Gr}$ $1$ ${m}^{2}$ Net radiation conductance between two surfaces Gr $\mathrm{false}$  If true, input of correction for Gr_act is valid use_correction  See Also