Численное моделирование течения в канале с неглубокими лунками с использованием Code Saturne
Автор: Цынаева А.А., Никитин М.Н.
Журнал: Труды Института системного программирования РАН @trudy-isp-ran
Статья в выпуске: 1 т.28, 2016 года.
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Работа посвящена построению модели и численному исследованию течения в прямоугольном канале с неглубокими лунками. Математическое моделирование выполняется на базе дифференциальных уравнений движения, энергии и состояния. Численное решение получено с использованием метода конечных объемов на базе программного пакета с открытым программным кодом Code Saturne. Построение сетки, учитывающей особенности течения вблизи лунок, выполнено в программном пакете Salome со свободной лицензией. В работе рассмотрены вопросы создания сетки, показана зависимость получаемого решения от размерности сетки, проведен анализ влияния типа сетки на время ее генерирования и качество получаемого численного решения для течения в прямоугольном канале с неглубокими лунками.
Свободное программное обеспечение, численное моделирование, аэродинамика, течение, лунки
Короткий адрес: https://sciup.org/14916320
IDR: 14916320 | DOI: 10.15514/ISPRAS-2016-28(1)-10
Numerical modeling of rectangular channel with shallow dumbbell dimples based Code Saturne
Numerical study was conducted for rectangular channel with dimples. Developed model was tested for adequacy by simulating of experiment, conducted by Dr. Terekhov, which was found in good agreement. Experimental setup utilized a single spherical dimple which was set at 11 diameters from inlet. Test simulation was conducted for incompressible fluid (water) in accordance with experiment conditions: inlet velocity 0.43 m/s, Reynolds for dimple 20000 and channel length 1.34 m. A 3D computation domain was meshed for 0.8 million elements with six viscous layers totalling 3 mm thick applied to smooth walls. A turbulent flow (Re = 31627) in rectangular channel with shallow dumbbell dimples was modelled with open source Code_Saturne. An ideal gas (ρ = 1.205 kg/m3) was considered as working medium. A 3D computation domain was meshed with open source Salome Meca for 0.77 million elements ranged 0.2...1.0 mm. Six viscous layers totalling 2 mm thick were applied to smooth walls. Unsteady flow simulated with k-w SST model utilizing 2nd order discretization schemes (SOLU) for velocity. 2000 iterations were calculated so far with pseudo time step of 0.1 ms. Additionally, impact of mesh quality regarding elements size on computation results was shown. Obtained results showed a strong dependence of flow velocity from inclination of dumbbell towards flow axis. Adjacent dumbbell dimples cause partial flow laminarization. Developed model shows aerodynamic advantage up to 10 % of dumbbell dimples over spherical ones of the same depth (h = 1.2 mm) and contact patch area (S = 59.76 mm2).
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