B217 Effect of non-condensable gas on experimental value of condensation coefficient

Abstract

Effect of non-condensing gas on the condensation process at the liquid-vapor interface is studied using the DSMC method. The simulation results show that the condensing flow causes an accumulation of the non-condensing gas in the vicinity of interface which increase the resistance and reduce the condensation heat transfer rate. Even if the concentration of the non-condensing gas is low in the bulk phase, the non-condensing gas is much accumulated at the interface. The paper indicates the possibility of low values of the experimental condensation coefficient is due to the existence of non-condensable gases.