This study numerically investigates the effectiveness of dry mist in suppressing infrared radiation–induced temperature rise inside vehicle cabins during summer conditions. A coupled radiative–flow analysis model was developed using STAR-CCM+, combining the Radiative Transfer Equation (RTE) with unsteady turbulence modeling via Detached Eddy Simulation (DES). Parametric studies were conducted for near-infrared wavelengths of 780 nm and 2500 nm to systematically examine the effects of mist particle diameter, volume fraction, absorption efficiency, and scattering efficiency. The results reveal that the thermal shielding performance does not solely depend on particle size or concentration but is strongly influenced by the absorption and scattering efficiencies. Notably, absorption efficiency demonstrated a greater impact on temperature reduction than scattering efficiency, indicating its critical role in design optimization. These findings provide valuable guidelines for designing dry-mist-based thermal control systems for vehicular applications.
Shigeru Ogawa (Wed,) studied this question.