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Main >> Applications >> Sample problems >> Thermal bridges in building construction. Test case 4 validation

# ISO 10211:2007 Thermal bridges in building construction. Test case A.4 validation

QuickField validation of the test case A.4 presented in ISO 10211:2007 Thermal bridges in building construction.

Problem Type:
3D problem of heat transfer.

Geometry:

all length units are in millimeters.

Given:
Thermal conductivity of insulation λ1 = 0.1 W/K·m.
Thermal conductivity of metal λ2 = 50 W/K·m.

Problem:
The metal bar penetrates the insulation wall. Determine the flux and the thermal coupling coefficients.

Solution:
Air contact surface thermal resistance Rs is caused by the convection. The convection coefficient value is reciprocal to the surface resistance value:
α = 1 / Rs [W/(K·m2)].

Results:
Temperature distribution in media:

 QuickField Reference %% Temperature 0.801°C 0.805°C 0.004°C Heat flux 0.543 W 0.54 W 1%

To comply with the ISO 10211:2007 the difference between calculated and reference heat flux should be less than 1% (0.005°C - for temperature). This simulation accuracy complies with the requirements of ISO 10211:2007.

• Download simulation files (files may be viewed using any QuickField Edition).