Effect of the Heat Flux Density on the Evaporation Rate of a Distilled Water Drop

Abstract

Abstract. This paper presents the experimental dependence of the evaporation rate of a nondeaerated distilled water drop from the heat flux density on the surfaces of non-ferrous metals (copper and brass). A drop was placed on a heated substrate by electronic dosing device.To obtain drop profile we use a shadow optical system; drop symmetry was controlled by a high-speed video camera. It was found that the evaporation rate of a drop on a copper substrate is greater than on a brass. The evaporation rate increases intensively with raising volume of a drop. Calculated values of the heat flux density and the corresponding evaporation rates are presented in this work. The evaporation rate is found to increase intensively on the brass substrate with raising the heat flux density.

Mechanism of Contact Line Movement of a Droplet Spreading Over a Solid Surface

“…The principle of operation is described in detailed in [21][22][23][24][25]. To form advancing and receding contact line, liquid was pumped in/out through an opening in the surface (Fig.1) Fig.…”

Experimental determination of change in the liquid layer thickness on the heated surface by confocal sensor

“…Due to this effect, high intensity of heat removal during evaporation of thin liquid layers provides keeping of the required temperature mode of the element. There are many studies in this scientific field [15][16][17][18][19]. Scientific and technological progress contributes to the emergence of inexpensive high-precision equipment, such as confocal sensors.…”

“…2). A more detailed description of the test cell is given in [19]. Experiments were conducted at constant heat flow; the initial temperature corresponded to 80, 90 and 100°С.…”

Experimental Research of Thermophysical Processes in A Closed Two-Phase Thermosyphon

“…At the same time the fundamental bases of jointly proceeding processes of conduction [3], convection [4][5][6] and phase transition [7][8][9][10][11][12][13][14][15][16] are not studied at level to provide the design of energy efficient heat removal equipment.…”