Thermal effect at motion of gas bubbles in uniform liquid

Thermal effects related to the processes of formation and disappearance of the surface occurring during the motion of gas bubbles (droplets) in a uniform liquid are considered. Their relation to the thermocapillary motion is discussed. It is shown that for millimeter-size bubbles floating in water under the effect of Archimedes’ force, temperature drop in the front and rear parts of the bubble amounts to a few tenths of a degree and can be measured in experiments. Experimentally observed temperature gradients were shown to appear in a liquid during the motion of a bubble swarm.