Void fraction and temperature measurements for pool boiling around a horizontal cylindrical surface

An experimental study of void fraction and temperature profiles in nucleate pool boiling of Freon-11 around a horizontal cylindrical copper surface is reported. The results obtained from the amplitude probability distributions of temperature fluctuations show that temperatures within the thermal sublayer region fluctuate widely, and beyond this region the distribution curve changes from Gaussian to the chi-squared type distribution function. It is found that the bubble boundary layer near the heated wall has an effect on the thickness of the superheat layer.