Fig 2 - uploaded by Semeon Dmitrievich Sleptsov
Content may be subject to copyright.
Source publication
The paper experimentally studies the dynamics of temperature increase during radiation heating of ice formed on a substrate. A measuring device for studying the temperature regime of the ice-substrate system irradiated by an artificial light source and a method for preparing samples are described. The results of measuring the temperatures of the ic...
Context in source publication
Citations
... The application of ice is due to the properties that manifest themselves when ice interacts with various materials by means of a heat flux through thermal conductivity, convection, and radiation. In [1,2], a strong influence of the substrate material on ice melting was shown. In [3], experiments were carried out in a climatic chamber, where the left boundary of the substrate was maintained at a constant low temperature, and this temperature was the initial condition for setting the problem in computations of [4 -6]. ...
... From the point of geometry, formulation of the problem of the "substrate-ice" system is similar to the scheme given in [4] (see Fig. 1). In a climate chamber with constant temperature T ∞ , on a vertical substrate with thickness 1 L normal to the incident radiation flux from a source with a filament temperature of 3200 K and with constant incident flux * E ν , an anisotropic light-scattering flat ice layer with initial thickness 2 L is fixed. Light is scattered from air bubbles with average radius b , r evenly distributed over the volume with fraction f V . ...
... The spectral composition of radiation is similar to that studied in [6], the values are given in the Table. We should note that in the presented work, as well as in [3], the left boundary of the substrate is maintained at constant temperature sub , T in contrast to [1,2]. ...
Numerical calculation of the influence of various types of opaque substrates on ice melting was carried out using mathematical modeling methods. It is shown that while maintaining a constant low temperature of the left boundary of the heat-conducting substrate, ice melting does not depend on its thermophysical properties. The threshold value of thermophysical properties, below which the dependence on the substrate must be taken into account, is found.
... Прикладное применение результатов численного моделирования тепловых процессов в системе подложка-лед в условиях проникающего теплового излучения, может быть направлено на решение проблем, связанных с технологией устранения, разупрочнения льда на различных поверхностях. В работах [1,2] авторы показали экспериментально влияние материала подложек на интенсивность радиационного нагрева слоя льда до температуры плавления. В [3] авторы проводили эксперименты в климатической камере, где слой льда закреплен на вертикальной подложке и левая граница бакелитовой подложки поддерживалась при постоянной низкой температуре. ...
... Геометрически схема задачи представлена на рис. 1. В климатической камере с постоянной температурой T на вертикальной непрозрачной подложке толщиной 1 L , по нормали к падающему потоку излучения от источника с температурой нити накаливания 3200 К и с постоянным падающим потоком * E , закреплен слой анизотропно рассеивающего свет плоский слой льда с начальной толщиной 2 L . Свет рассеивается от пузырьков воздуха со средним радиусом b r и равномерно распределенных по объему с долей v f . ...
Calculations of ice melting on opaque substrates made of different materials under the influence of an artificial radiation source were carried out by numerical simulation. The presence of heat-conducting substrates in this mathematical formulation, there is no need to take into account the thermophysical properties of the substrate is shown. For substrates with low heat-conducting properties, it becomes important to implement the mathematical formulation of the problem with boundary conditions for insulating materials.
