Temperature regime in the surface layer of the substrate in the area under the evaporating liquid drop
| Parent link: | International Communications in Heat and Mass Transfer.— .— Amsterdam: Elsevier Science Publishing Company Inc. Vol. 169, Pt. C.— 2025.— Article number 109795, 18 p. |
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| Other Authors: | , , , , , , , , |
| Summary: | Title screen The need to comply with the regulatory temperature regime in intensively heated elements of electronic and radio-electronic equipment leads to the search for methods of effective heat removal in such conditions. For this reason, much attention has been paid to the study of drop cooling systems for surfaces heated to high temperatures, in recent years. However, until recently, the analysis of drop cooling processes has been carried out without directly measuring the temperatures of the cooled element in the area of the coolant drop. In this case, the temperatures in the layer of heated material adjacent to the contact surface with the drop are the main characteristic of the operation of such a cooling system. The purpose of this work is to experimentally determine temperatures in a thin layer of material adjacent to the interface “drop of water – plate of heated metal” in a typical range of the changes in heat fluxes and temperatures of heated equipment elements. According to the experimental results, evaporation of a drop under conditions of its conductive heating by the surface of a plate with a temperature from 60C to 100C leads to a decrease in surface temperatures, which is the interface “drop – heated plate” by no more than 1–3C. In other words, a drop can provide a regime close to a constant temperature of the heated surface, but not significantly reduce it. It has also been found that the temperature of the open surface of the plate differs slightly (by 2–3C) from the temperature of the surface on which the drop is located. A hypothesis is formulated about the mechanism of the established effect: a slight decrease in the temperature of the surface layer of the plate in the area covered by the drop is due to the flow of heat in two transverse coordinate directions from zones that are not affected by evaporation of the drop beyond the reach of its boundaries Текстовый файл AM_Agreement |
| Published: |
2025
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| Subjects: | |
| Online Access: | https://doi.org/10.1016/j.icheatmasstransfer.2025.109795 |
| Format: | Electronic Book Chapter |
| KOHA link: | https://koha.lib.tpu.ru/cgi-bin/koha/opac-detail.pl?biblionumber=683797 |