motion analyses in modeling of flow and contaminant in cleanrooms: a review

The motion effect on the contaminant dispersion is a key parameter in cleanrooms. this parameter is ignored in many experimental and numerical studies because of its complexities but could cause errors in the obtained results. in real situations, particularly in isolating rooms and cleanrooms, the motion that is usually caused by the human moving and doors opening and closing leads to considerable flow changes that require attention. the present study aimed to explore studies that noticed and studied different aspects of the subject and to summarize the areas with priority for further investigation. modeling the problem using experimental and numerical approaches requires steps and settings that are described in the experimental and numerical sections. the motion analysis is divided into two sections of human and door motions, covering the key findings of previous and recent publications, and concluding the required future studies. the results of approximately fifty published studies have revealed important findings related to cleanroom class degradation, temperature gradient reduction, increased contamination and secondary flow depth, and particle settlement in patients. these studies have shown that the ventilation system may need to be redesigned. furthermore, it is crucial to consider the motion in both experimental and numerical studies based on the application. additional research is necessary to further understand these findings.