Prediction of mass transfer rate on the surface of tested building material using CFD analysis

We developed an airflow control unit for small chambers for uniformly controlling airflow on the surface of tested building material in the small chambers. We will present the mass transfer rate on the surface of tested building materials corresponding to an actual building in order to exactly evaluate the performance of the reduced amount and concentration of released chemical materials with the small chambers. We measured the airflow velocity on the surface of building materials in the small chamber with the developed airflow control unit and the fan speed for airflow control. We reviewed the distribution of water vapor concentration in the small chamber by means of CFD (Computational Fluid Dynamics) and estimated the mass transfer rate on the surface of building material to confirm test reliability.