Application ID: 75021
Because the atmosphere is nearly transparent to wavelengths in the range 8 to 13 µm (atmospheric window) for a clear sky, it is possible to cool down a surface even during a sunny day. This model compares the temperature distribution on a concrete block exposed to ambient and solar radiation on his upper surface when this surface is a black surface and when it has radiative cooling properties. Convective cooling is not accounted for. This model couples the Heat Transfer in Solids interface with the Surface-to-Surface Radiation interface. 4 spectral bands are used to model the wavelength dependency of the irradiation, of the surface emissivity and of the sky emissivity.
This model example illustrates applications of this type that would nominally be built using the following products:
however, additional products may be required to completely define and model it. Furthermore, this example may also be defined and modeled using components from the following product combinations:
The combination of COMSOL® products required to model your application depends on several factors and may include boundary conditions, material properties, physics interfaces, and part libraries. Particular functionality may be common to several products. To determine the right combination of products for your modeling needs, review the Specification Chart and make use of a free evaluation license. The COMSOL Sales and Support teams are available for answering any questions you may have regarding this.