Study on the Effects of Evaporation and Condensation on the Underfloor Space of Japanese Detached Houses Using CFD Analysis

[...]since the internal airflow is complicated, it is difficult to predict the areas where condensation could occur. [...]we employed CFD analyses to determine and confirm the effects of evaporation and condensation relevant to natural ventilation. [...]based on these fluctuating conditions, the rate of evaporation and condensation over time and the accumulated volume of condensed water on the surface were determined. [...]the results, depending on the differences in the outdoor environmental conditions (wind speed, humidity), were compared by calculating the change per unit time (mg m−2 h−1) through the analytical method, as shown in Figure 12. [...]our study confirmed variations over time in the rate of evaporation and condensation, the weight of condensed water, and the area where condensation would likely occur relevant to a rainy day during the rainy season, when the average humidity was high. 4.1.