Effect of Overlying Liquid Layer on Dryout Heat Flux Measurements

Using results of experiments simulating hydrodynamic aspects of countercurrent flow in particulate beds, it is shown that most of the existing dryout heat flux data exhibit an influence of the overlying liquid layer. If the experiments are conducted in beds of sufficient depth such that the overlying liquid layer has little or no effect, the dryout heat flux in bottom- and volume-heated beds of large diameter particles should be the same.