Experimental Heat Transfer, Vol.23, No.4, 333-348, 2010
EXPERIMENTAL VALIDATION OF A TWO-DIMENSIONAL MODEL OF THE TRANSIENT AND STEADY-STATE CHARACTERISTICS OF A WICKED HEAT PIPE
The transient behavior of a copper-water wicked (80 mesh SS-304 screen) heat pipe during start-up is studied. The transient axial temperature distributions are measured and successfully compared for all the three sections of the heat pipe with the numerical solution of a developed two-dimensional model that utilizes the concept of a growing thermal layer in the wall and the wick region and takes into account axial conduction during transient operation. Steady-state temperature profiles are obtained as a limiting case. The experimental and theoretically predicted time required to attain steady state are in close agreement as well.