Void Volume Ratios During Steady State Local Boiling in Case of Constant Power Distribution

A tentative method for the calculation of the void volume fraction at zero quality in case of constant heat input along the channel is presented. By assuming a constant volumetric condensation density, proportional to the squared flow velocity, the void volume fraction at zero quality can be predicted. Comparing the calculated void volumes with actual measurements for water, the error in the void calculation is less than ±25%.