The influences of solar position and material radiative properties on temperature distribution, as well as natural convective flow inside airship, were further simulated and discussed.
Influence of water deposit on heat radiation absorptivity of a metallic surface was measured in a device designed for investigation of thermal radiative properties of materials at cryogenic temperatures.
The evaluation of thermal and radiative properties of materials to be used as a hot part of thermal protection systems is a key issue for the design process of the HTC and UHTC components.
Oxide compositions of silicon are widely used in electronics, radiation technology and radiochemical processes [1],[2],[5],[9],[10]. Conversion of ionizing radiation energy and transfer to surface levels is of great importance for radiative study of materials and radiation technology.
A solar reflecting material for radiative cooling applications: ZnS pigmented polyethylene.
Therefore, it is necessary to know the thermal radiative properties of the material under the simulated high temperature dynamic heating conditions on the ground.
The analyses focus on electron and hole carrier injection efficiency, carrier distributions, electron leakage, and radiative recombination, subsequently, optical material gain, and optical intensity.
For the scalar energy input of radiative pressure into the material we define a new coupling variable K ⋅ ∇ u T = K i j ∇ i u j = : P coup.
Last, but not the least in importance, the determination of radiative properties of the materials involved – either through experimental methods or predictive models – must be an ongoing effort as new materials are continuously being developed.
The effective medium theory (EMT) can be used for fast and approximate calculations of inhomogeneous media's optical properties, which is helpful for considerably reducing computation times for designing the thermal radiative properties of particulate materials.
