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An investigation of natural convection of three dimensional horizontal parallel plates from a steady to an unsteady situation by a CUDA computation platform

机译:利用CUDA计算平台研究三维水平平行板从稳态到非稳态的自然对流

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摘要

The heat transfer of natural convection in three dimensional horizontal parallel plates with a heated bottom surface is investigated numerically. For enlarging the application domain, the compressibility of the fluid is taken into consideration instead of the Boussinesq assumption. Numerical methods of the Roe scheme, preconditioning and dual time stepping are adopted for solving governing equations of a low speed compressible flow. A non-reflection condition is used at both apertures in order to decrease computational grids and a CUDA computational platform is developed to economize massive computing time. Variations of thermal and flow fields are examined in detail. The results show that accompanied with elongating the length of the heated bottom surface, both thermal and flow fields are changed from a steady to an unsteady situation.
机译:数值研究了底面受热的三维水平平行板中自然对流的传热。为了扩大应用范围,考虑流体的可压缩性而不是Boussinesq假设。采用Roe方案,预处理和双重时间步长的数值方法求解低速可压缩流的控制方程。为了减少计算网格,两个孔都使用了非反射条件,并且开发了CUDA计算平台以节省大量计算时间。详细研究了热场和流场的变化。结果表明,伴随着加热底表面长度的增加,热场和流场都从稳定状态变为不稳定状态。

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