Определение плотности теплового потока в области контактной линии при испарении жидкости в пузырь
Определение плотности теплового потока в области контактной линии при испарении жидкости в пузырь
Аннотация:
Описывается способ определения плотности теплового потока на поверхности тонкой фольги, недоступной для тепловизионных измерений по данным тепловизионной съёмки другой стороны фольги, доступной для измерений. Математически задача сводится к решению задачи Коши для эллиптического уравнения, которая является некорректной. Задача решается с использованием сглаживания шума в исходном поле температуры и правильном ограничении на количество членов разложения в рядах Фурье. По результатам измерений плотность теплового потока достигает максимума в области контактной линии и соcтавляет 4200 Вт/м2.
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Работа выполнена при финансовой поддержке Российского научного фонда (проект 19-19-00695П).
Н. Е. Сибиряков
- Институт теплофизики им. С. С. Кутателадзе СО РАН,
просп. Акад. Лаврентьева, 1, г. Нововсибирск 630090, Россия
E-mail: kolyasibir@yandex.ru
Д. Ю. Кочкин
- Институт теплофизики им. С. С. Кутателадзе СО РАН,
просп. Акад. Лаврентьева, 1, г. Нововсибирск 630090, Россия
E-mail: kochkin1995@mail.ru
О. А. Кабов
- Институт теплофизики им. С. С. Кутателадзе СО РАН,
просп. Акад. Лаврентьева, 1, г. Нововсибирск 630090, Россия
E-mail: kabov@itp.nsc.ru
А. Л. Карчевский
- Институт теплофизики им. С. С. Кутателадзе СО РАН,
просп. Акад. Лаврентьева, 1, г. Нововсибирск 630090, Россия
E-mail: karchevs@math.nsc.ru
Статья поступила 04.06.2022 г.
После доработки — 04.06.2023 г.
Принята к публикации 07.06.2023 г.
Abstract:
The article describes a method for determining the heat flux density on the surface of a thin foil that is inaccessible for thermal imaging measurements according to thermal imaging data from the other side of the foil available for measurements. Mathematically, the problem is reduced to solving the Cauchy problem for an elliptic equation, which is ill-posed. The problem is solved using noise smoothing in the initial temperature field and the correct limit on the number of expansion terms in the Fourier series. According to the measurement results, the heat flux density reaches its maximum in the area of the contact line and amounts to 4200W/m2.
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