О применении неявных схем для численного моделирования динамики самогравитирующего газа
Авторы
-
А. В. Попов
-
Е. В. Чижонков
Ключевые слова:
численное моделирование
неявная разностная схема
самогравитирующий газ
градиентная катастрофа
Аннотация
Для численного моделирования динамики самогравитирующего газа предлагается использовать две неявные разностные схемы первого и второго порядков аппроксимации. В качестве тестовой задачи рассматривается динамика локального возмущения плотности плоского пространственно одномерного газового слоя. В процессе движения из начального бесконечно дифференцируемого состояния постепенно формируются градиентные катастрофы (разрывы), которые затем продолжают перемещаться в пространстве. Кроме выполнения законов сохранения массы и импульса расчеты показали хорошее соответствие с уравнением, описывающем взаимную трансформацию гравитационной и кинетической энергий.
Раздел
Методы и алгоритмы вычислительной математики и их приложения
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