Study on the indoor airflow pattern and thermal comfort under cross ventilated situation of residential building by using domain decomposition technique

1. Study on prediction in cross-ventilation performance2.我们主要研究四种kinds of studies.1Evaluation of cross-ventilation performance of various opening conditions3. Prediction method ofcooling sensation due to breezing airflow driven by cross-ventilation4. Study on the convective heattransfer coefficient and thermal resistance of clothing under cross ventilationThese main resultsare shown below. Modification of inflow boundary conditions based on coupled simulation resultsshowed some effect to improve reproduction accuracy of cross-ventilated indoor airflowstructures The results showed that, generally speakingwind velocity ratio value C可以确定每个人的情况almost regardless of the location or time slotand confirmed the validity of the method of evaluating cross-ventilation performance which uses thewind velocity ratio C and ignores locality. From the results of the cooling effect ofcross-ventilation airflow had on the occupants我们也发现它是可能的perform relatively high-accuracy prediction by using numericalthermal mannequin with decoupled CFD technique In the case of clothing with high breathabilitythermal resistance of clothing decreased by 10-20% at a wind speed of 0.5 m/s，20% at a wind speed of 1 m/s, 30-40% at a wind speed of 2 m/s。

We mainly did four kinds of studies.1. Study on prediction in cross-ventilation performance2. Evaluation of cross-ventilation performance of various opening conditions3. Prediction method of cooling sensation due to breezing airflow driven by cross-ventilation4. Study on the convective heat transfer coefficient and thermal resistance of clothing under cross ventilationThese main results are shown below.・Modification of inflow boundary conditions based on coupled simulation results showed some effect to improve reproduction accuracy of cross-ventilated indoor airflow structures.・The results showed that, generally speaking, the wind velocity ratio value C can be determined uniquely for each opening case, almost regardless of the location or time slot, and confirmed the validity of the method of evaluating cross-ventilation performance which uses the wind velocity ratio C and ignores locality.・From the results of the cooling effect of cross-ventilation airflow had on the occupants, we also found that it is possible to perform relatively high-accuracy prediction by using numerical thermal mannequin with decoupled CFD technique.・ In the case of clothing with high breathability, thermal resistance of clothing decreased by 10-20% at a wind speed of 0.5 m/s, 20% at a wind speed of 1 m/s, and 30-40% at a wind speed of 2 m/s.