I need a UDF code for Ansys Fluent about radiation modeling for a Helistot receiver.

Hello I need a UDF code for Ansys Fluent about radiation modeling for a Helistot receiver. The target of the work is writing a C++ code in Ansys UDF to enter the heat generations on each receiver panel as a wall boundary condition. The computational domain is a hexahedron with a square horizontal base of 30 m side and a height of 36 m, the specifications given in the figures. At the center of the domain the receiver [(x,y) (0,0)] is approximated by a hollow polyhedron with 24 sides, 5.1 m diameter and 6.2 m total length, given in the figures. While creating the geometry, each surface of the receiver in contact with the air is divided into 10 parts and the boundary condition for 24 surfaces (240 parts in total) must be given as heat generation (W/m3). The heat generation data for each surface is given as excel data sheet. Thank you.