A compendium to Wet Panties. Originally titled “A New Dynamic Clothing Model. Part 2: Parameters Of The Underclothing Microclimate”
Based on a new modeling, described in the first part of this paper, which takes into account the pumping effect under garments, the various parameters characterising the confined air, and managing its dry and latent losses, are determined. The mean temperature, calculated from heat exchanges with skin (or underwear) and with the garment, progresses exponentially as a function of the trapped time, until a limit. The mean humidity amount, determined from the energy of total evaporation, from the air layer renewal rate and from the water vapour diffusion through the fabric, increases linearly. Using a movable thermal manikin, walking at various speeds, and with a combined effect with wind, the intrinsic air speed and convection coefficient are defined. The intrinsic air speed combines the effects of external air and body motions. The intrinsic convection coefficient is a linear function of the square root of the inner air speed.