Experimental investigation of heat transfer from local heat sources to a dielectric liquid film, flowing under gravitation over a plate inclined at different angles with respect to the horizontal, has been performed. The liquid evaporated to the vapor-air mixture. The initial temperature of the liquid was essentially lower than its saturation temperature at atmospheric pressure. At a threshold value of heat flux, regular structures formed at the film surface. With decrease in plate inclination angle the wavelength of the regular structures became several times larger. Change in plate inclination angle did not significantly influence heat transfer in the region before the regular structures formation. Film breakdown occurred either after or at the moment of the regular structures formation. Heat flux at which continuous film flow was disturbed, decreased with decreasing the plate inclination angle and increased with decreasing the heater length along the flow.
|Number of pages||14|
|Journal||International Journal of Heat and Technology|
|Publication status||Published - 2001|
ASJC Scopus subject areas
- Fluid Flow and Transfer Processes
- Food Science