Example 1. Steady-state heat transfer analysis

Aug 28, 2020

Let us consider an example of analysis of heat transfer of a brick house external wall.

Picture 8. Wall section

We create a model in the Model type 15, which exists exactly to evaluate the heat transfer analysis. Lets consider a section of the wall one meter long.

STEP 1. GEOMETRY

Picture 9. Geometry modeling

Picture 10. FE model

STEP 2. Creating the CONVECTIVE elements

To define the air temperature, we create bar elements on the internal and external surfaces of the wall, and change their type for FE type No.1555.

Picture 11. FE model with convective elements

STEP 3. MATERIAL PROPERTIES

Let's define the corresponding thermal conductivity coefficients K on the wall layers. The values of Specific heat C and Density R0 are not used in the steady-state analysis, therefore they can be defined as equal to units.

Picture 12. Material properties of the corresponding wall layers

 

For the convective elements we also create the stiffness, and define there the heat transfer coefficients (film coefficients) for the internal and external layers:

Picture 13. Stiffness of the wall layers

 

STEP 4. EXTERNAL LOAD

Using the external load, we apply the air temperature on the convective elements. Therefore, in the Loads we open convective heat transfer and define the temperature for the internal and external sides of the wall.

Picture 14. Air temperature definition

STEP 5. VIEW RESULTS

Picture 15. Results

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