HEAT TRANSFER AND FLUID FLOW IN THE CLOSED THERMOSYPHON
An analytical and experimental study of the single component, single phase closed thermosyphon with laminar and turbulent boundary layer flow is presented. In the experimental study, a transparent test cell was employed so as to directly observe the transport processes which were found to be basically convective. Experiments, with Prandtl numbers from 4 to 940, were conducted for overall temperature differences of one, three and nine degrees
centigrade for which the temperature field was measured.
A convective model, showing good agreement with experimental heat transfer data, is formulated for the analytical study.