Численное моделирование турбулентности и переноса мелкодисперсной примеси в городских каньонах
Авторы
-
А.В. Глазунов
Ключевые слова:
турбулентность
городская среда
распространение примесей
лагранжевы методы переноса частиц
метод крупных вихрей
LES-модель
Аннотация
При помощи LES-модели, содержащей блок лагранжева переноса частиц, проведены расчеты турбулентности и распространения мелкодисперсных примесей в городской среде. Рассматривалась упрощенная геометрия периодической последовательности городских каньонов при поперечном направлении среднего ветра. Проведено тестирование различных лагранжевых методов и их сравнение с эйлеровыми методами переноса концентрации примесей, а также сравнение результатов расчетов с лабораторными данными. Выполнены расчеты переноса тяжелых углеродных частиц с размерами до семидесяти микрон в диаметре. На основе анализа лагранжевых траекторий частиц выявлены закономерности переноса мелкодисперсной примеси турбулентностью и крупными вихрями.
Раздел
Раздел 1. Вычислительные методы и приложения
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