This thermal bridge validation case belongs to heat transfer. The aim of this test case is to validate the following parameters:
The simulation results of SimScale were compared to the results presented in EN ISO 10211 Standard, case 4.
The 3D geometry for this project is a thermal bridge consisting of an iron bar penetrating an insulation layer, as seen in Figure 1:
The insulated wall consists of a block with a rectangular cross-section of 1×1 \(m\) and a width of 0.2 \(m\). The bar is placed vertically in the center of the wall and goes through the whole layer. It has a rectangular cross-section of 0.1×0.05 \(m\) and a total length of 0.6 \(m\), including its penetrated part.
Tool Type: Code_Aster
Analysis Type: Linear, steady-state heat transfer analysis
Mesh and Element Types: For this case, SimScale’s standard meshing algorithm was used, which generates a combination of tetrahedral and hexahedral cells. The characteristics of the resulting mesh can be seen below:
|Case||Mesh Type||Nodes||Cells||Element Type|
|EN ISO 10211 Case 4||Second-order standard||769105||553835||Standard|
In the image below, it’s possible to see the standard mesh in detail:
Each body is assigned to a different material:
As shown in Figure, the following boundary conditions are defined:
The results obtained with SimScale were compared to those presented in . The two criteria that must be satisfied are:
The bulk calculator feature provided in SimScale’s integrated post-processor was used to extract the maximum temperature of the beam’s end cross-section, which is coincident with the insulation layer. The Heat Flux was measured using the Heat Flow result control Item. The table below provides an overview of the results:
|Result||Reference Value||SimScale Result||Deviation|
|Maximum temperature on exterior||0.805\(°C\)||0.803\(°C\)||0.002\(°C\)|
Table 4 indicates a good agreement of the SimScale results with the reference paper, with a permitted difference between the extracted values and the standard.
Below you can see the results of the simulation, created in the online post-processor:
Additionally, the heat flux magnitude can be visualized on the cutting plane normal to the X axis too:
Last updated: August 30th, 2022
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