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ПОТЕРИ ДАВЛЕНИЯ ДЛЯ ТЕЧЕНИЯ СТЕПЕННОЙ ЖИДКОСТИ В ТРУБЕ ПЕРЕМЕННОГО СЕЧЕНИЯ

ПОТЕРИ ДАВЛЕНИЯ ДЛЯ ТЕЧЕНИЯ СТЕПЕННОЙ ЖИДКОСТИ В ТРУБЕ ПЕРЕМЕННОГО СЕЧЕНИЯ

Abstract

Выполнено численное моделирование установившегося ламинарного течения несжимаемой степенной жидкости в трубе с препятствием заданной формы. Для математического описания процесса используются уравнение переноса вихря и уравнение Пуассона для функции тока, при этом реологические свойства среды описываются степенным законом Оствальда-де Ваале. Получение стационарного решения сформулированной задачи осуществляется методом установления на основе конечно-разностной аппроксимации основных уравнений. Распределение давления находится численным решением уравнения Пуассона. Выполнены параметрические исследования кинематических и динамических характеристик течения в зависимости от основных параметров задачи для неньютоновских сред. Продемонстрировано влияние числа Рейнольдса, показателя нелинейности реологической модели и геометрических характеристик препятствия на значение коэффициента местного гидравлического сопротивления

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Keywords

расширение тел, гидравлическое сопротивление, преобразование координат, ламинарное течение, степенная жидкость, Пуассона уравнение для давления, цилиндрические трубы, течения в канале с сужением, Оствальда-де Ваале модель

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    This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
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    popularity
    This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
    Average
    influence
    This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
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    impulse
    This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
    Average
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selected citations
These citations are derived from selected sources.
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
0
Average
Average
Average
Green