Author(s)

F. Hensel and U. Rohde

Abstract

Studies on the measurement of turbulent dispersion of a radiotracer in an experi- mental setup with natural convection liquid-gaseous flow were carried out at the Forschungszentrum Rossendorf. Liquid-gaseous bubbly flow was generated in a narrow tank by injection of pressurized air into water or by catalytic disintegration of HiO?. A small amount of a positron emitting radiotracer liquid (^F in an aque- ous NaF solution) was injected instantaneously at a certain point of the tank. The Positron Emission Tomography (PET) technique was used to observe the spread- ing of the tracer liquid in the bubbly flow. A double head gamma detector array was used for measuring the positron annihilation rate which is proportional to the tracer concentrati

Keywords