IMAGING VAPOUR BUBBLE GROWTH ON A HEATED SURFACE

using high speed video camera (HS Roper Scientfic) in the framework of ZLC program

vapour movie
<------- 3.7mm ---------->

Vapour bubble growing, separating and condensing. Note acceleration of the bubble when condensing! Methanol under atmospheric pressure, 4500frames/s.

 

vapour movie
<------- 1.26mm ---------->

Vapour bubble growing and separating with the "classical" neck. Methanol under atmospheric pressure, 4500frames/s.

 

vapour movie
<------- 3.76mm ---------->

Interaction of the growing vapour bubble with its neighbour. Note strong deformation and oscillation of the bubble, indicating strong decrease of the surface tension at the boiling point. Methanol under atmospheric pressure, 4500frames/s.

 

vapour movie
<----- 0.87mm ---->

Vapour bubble detachment under "pumping" from below conditions. Methanol under atmospheric pressure, 13500frames/s.

 




T. Kowalewski, A. Cybulski, S. Blonski, R. Trzcinski
July 30 20:30:04 MET 2001