Явно-неявная схема CABARETI–NH для уравнений динамики слабосжимаемой жидкости
Авторы
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В. М. Головизнин
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Петр А. Майоров
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Н. А. Афанасьев
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Павел А. Майоров
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А. В. Соловьев
Ключевые слова:
негидростатическое приближение
смешанные эйлерово-лагранжевые переменные
слабосжимаемая жидкость
уравнения гиперболического типа
свободная поверхность
балансно-характеристическая схема
Аннотация
В статье рассматривается явно-неявная балансно-характеристическая схема CABARETI–NH (CABARET Implicit Non-Hydrostatic), основанная на схеме КАБАРЕ, для решения гиперболизированной системы уравнений Навье–Стокса. Неявность вдоль одного пространственного направления позволяет значительно увеличить шаг по времени на вычислительных сетках с большим аспектным отношением ячеек. Для разрешения введенной неявности используется метод гиперболической прогонки. Это позволяет сохранить вычислительную эффективность алгоритма на уровне явных схем. Приводятся результаты валидации модели на лабораторном эксперименте трехмерного гравитационного течения стратифицированной жидкости.
Раздел
Методы и алгоритмы вычислительной математики и их приложения
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