Structure: cylinder with several cavities Test objective: cavity radiation for axisymmetric elements If you run this example for the first time, replace *VIEWFACTOR,READ into *VIEWFACTOR,WRITE. It leads to the creation of file axrad2.vwf containing the viewfactors. This can take a while. For subsequent runs this file can be reused by using the *VIEWFACTOR,READ card. This speeds up the execution time.