Numerical example

The Gebhart method describes the radiative heat transfer in terms of heat coming from one surface and absorbed by another, including all reflections. The Gebhart matrix traces exactly the radiative transfer contribution of each surface to the others.

The plates exchange heat with each other and with the room, but only the plate surfaces facing each other are to be considered in the analysis (other side assumed to be perfectly insulated).

The view-factor of between the two surfaces is analysed to be 0.285. The Gebhart factor for this problem the result would become:
B12 = 0.1473 (very close to the factor if no reflection are taken into account = F12 x ε2 = 0.1425)

In this case the radiative exchange can be calculated by:

The surface to surface heat transfer matrix (in W) of this system is given below for this method.


Wim van der Hoek Award…

During the 18th edition of the Precision Fair, the Wim van der Hoek Award 2018 was presented under the auspices of the DSPE (Dutch Society for Precision Engineering). The prize...

Read more
Knowledge day Topology Optimization March…

In complex engineering problems, particularly with multiphysics, the multitude of boundary conditions quickly becomes too complex for engineers to oversee. At the same time, the maturing of Additive Manufacturing has...

Read more
Mikroniek September 2019: Manufacturability

The September issue of Mikroniek features the theme of manufacturability in a very broad sense. Obviously, additive manufacturing (AM) is covered extensively, with a general update, the design of a...

Read more