Size distribution of droplets created by vapour condensation through a cooled pipe

The average droplet size and the size distribution of droplets created by passing vapour through a cooled pipe are studied. The idea of the existence of a Peclet number dependent upon the critical length, for which the non-uniformity of the droplet reaches a maximum, is logically proposed here and demonstrated by applying a relatively crude analysis. In spite of the use of a simplified model, the results also indicate that the droplet distribution follows a zero-order logarithmic normal distribution—fact that was experimentally determined by Davis and Nicolaon [3].