findThermalBC

Find thermal boundary conditions assigned to a geometric region

Syntax

tbca = findThermalBC(boundaryConditions,RegionType,RegionID)

Description

tbca = findThermalBC(boundaryConditions,RegionType,RegionID) returns the thermal boundary condition assigned to the specified region.

Examples

Find Thermal Boundary Conditions for Edges of 2-D Geometry

Create a thermal model and include a square geometry.

thermalmodel = createpde("thermal");
geometryFromEdges(thermalmodel,@squareg);
pdegplot(thermalmodel,"EdgeLabels","on")
ylim([-1.1 1.1])
axis equal

Apply temperature boundary conditions on edges 1 and 3 of the square.

thermalBC(thermalmodel,"Edge",[1 3],"Temperature",100);

Apply a heat flux boundary condition on edge 4 of the square.

thermalBC(thermalmodel,"Edge",4,"HeatFlux",20);

Check the boundary condition specification on edge 1.

tbcaEdge1 = findThermalBC(thermalmodel.BoundaryConditions,"Edge",1)

tbcaEdge1 = 
  ThermalBC with properties:

               RegionType: 'Edge'
                 RegionID: [1 3]
              Temperature: 100
                 HeatFlux: []
    ConvectionCoefficient: []
               Emissivity: []
       AmbientTemperature: []
               Vectorized: 'off'
                    Label: []

Check the boundary condition specifications on edges 3 and 4.

tbca = findThermalBC(thermalmodel.BoundaryConditions,"Edge",3:4);
tbcaEdge3 = tbca(1)

tbcaEdge3 = 
  ThermalBC with properties:

               RegionType: 'Edge'
                 RegionID: [1 3]
              Temperature: 100
                 HeatFlux: []
    ConvectionCoefficient: []
               Emissivity: []
       AmbientTemperature: []
               Vectorized: 'off'
                    Label: []

tbcaEdge4 = tbca(2)

tbcaEdge4 = 
  ThermalBC with properties:

               RegionType: 'Edge'
                 RegionID: 4
              Temperature: []
                 HeatFlux: 20
    ConvectionCoefficient: []
               Emissivity: []
       AmbientTemperature: []
               Vectorized: 'off'
                    Label: []

Find Thermal Boundary Conditions for Faces of 3-D Geometry

Create a thermal model and include a block geometry.

thermalmodel = createpde("thermal","transient");
gm = importGeometry(thermalmodel,"Block.stl");
pdegplot(thermalmodel,"FaceLabels","on","FaceAlpha",0.5)

Apply temperature boundary condition on faces 1 and 3 of a block.

thermalBC(thermalmodel,"Face",1,"Temperature",100);
thermalBC(thermalmodel,"Face",3,"Temperature",300);

Apply convection boundary condition on faces 5 and 6 of a block.

thermalBC(thermalmodel,"Face",[5,6],...
                       "ConvectionCoefficient",5,...
                       "AmbientTemperature",27);

Check the boundary condition specification on faces 1 and 3.

tbca = findThermalBC(thermalmodel.BoundaryConditions,"Face",[1,3]);
tbcaFace1 = tbca(1)

tbcaFace1 = 
  ThermalBC with properties:

               RegionType: 'Face'
                 RegionID: 1
              Temperature: 100
                 HeatFlux: []
    ConvectionCoefficient: []
               Emissivity: []
       AmbientTemperature: []
               Vectorized: 'off'
                    Label: []

tbcaFace3 = tbca(2)

tbcaFace3 = 
  ThermalBC with properties:

               RegionType: 'Face'
                 RegionID: 3
              Temperature: 300
                 HeatFlux: []
    ConvectionCoefficient: []
               Emissivity: []
       AmbientTemperature: []
               Vectorized: 'off'
                    Label: []

Check the boundary condition specifications on faces 5 and 6.

tbcaFace5 = findThermalBC(thermalmodel.BoundaryConditions,"Face",5)

tbcaFace5 = 
  ThermalBC with properties:

               RegionType: 'Face'
                 RegionID: [5 6]
              Temperature: []
                 HeatFlux: []
    ConvectionCoefficient: 5
               Emissivity: []
       AmbientTemperature: 27
               Vectorized: 'off'
                    Label: []

tbcaFace6 = findThermalBC(thermalmodel.BoundaryConditions,"Face",6)

tbcaFace6 = 
  ThermalBC with properties:

               RegionType: 'Face'
                 RegionID: [5 6]
              Temperature: []
                 HeatFlux: []
    ConvectionCoefficient: 5
               Emissivity: []
       AmbientTemperature: 27
               Vectorized: 'off'
                    Label: []

Input Arguments

boundaryConditions — Boundary conditions of a thermal model

BoundaryConditions property of a thermal model

Boundary conditions of a thermal model, specified as the BoundaryConditions property of a ThermalModel object.

Example: thermalmodel.BoundaryConditions

RegionType — Geometric region type

"Face" | "Edge"

Geometric region type, specified as "Face" for 3-D geometry or "Edge" for 2-D geometry.

Data Types: char | string

RegionID — Geometric region ID

vector of positive integers

Geometric region ID, specified as a vector of positive integers. Find the region IDs using pdegplot with the "FaceLabels" (3-D) or "EdgeLabels" (2-D) value set to "on".

Data Types: double

Output Arguments

tbca — Thermal boundary condition for a particular region

ThermalBC object

Thermal boundary condition for a particular region, returned as a ThermalBC object.

Version History

Introduced in R2017a