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3D modelling of heat transfer and moisture transport in young HPC structures with hybrid finite elements

机译:具有混合有限元的年轻HPC结构中传热和水分传输的3D建模

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Simulation of the hygro-thermo-chemical process of cement hydration in high-performance concrete (HPC) is performed coupling heat transfer with moisture transport, and accounting for an internal heat source and a moisture sink designed to simulate the chemical reactions developing in HPC structures. The three-dimensional finite element formulation is based on the direct approximation of temperature and relative humidity (RH) in the element domain. The heat and moisture flux fields are independently approximated on its boundary. Naturally hierarchical bases are used to set up these approximations to enhance adaptive refinement, while the geometry of the element is described independently to enhance the use of coarse, unstructured meshes. The solving system is sparse and well suited to parallelization. The relative performance of the formulation is illustrated using testing problems supported by experimental data.
机译:通过将热传递与湿气传输相结合,对高性能混凝土(HPC)中的水泥水化过程的湿热化学过程进行了模拟,并考虑了内部热源和湿气沉池,这些热量源和湿气沉池旨在模拟HPC结构中发生的化学反应。三维有限元公式是基于元素域中温度和相对湿度(RH)的直接近似。热和湿通量场在其边界处独立地近似。自然地,使用分层基础来建立这些近似值,以增强自适应细化,同时独立描述元素的几何形状,以增强对粗糙,非结构化网格的使用。求解系统稀疏,非常适合并行化。使用实验数据支持的测试问题来说明配方的相对性能。

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