论文标题
冰的前向对流电流塑造
Ice front shaping by upward convective current
论文作者
论文摘要
通过实验和数值模拟研究了在充满水的差分加热腔中形成的冰的程度和形态。我们表明，负责冰层的主要机制是系统中存在冷向对流电流。这样的电流归因于水状态的特殊方程，即密度与温度的非单调依赖性。冰面的精确形式取决于几个因素，首先是整个细胞的温度差，其次驱动对流，其次是壁倾斜相对于垂直的倾斜度，在这里探索了这两种垂直方向。我们提出了一个边界层模型和一个浮力强度模型，该模型解释了冰形态的主要特征。
The extent and the morphology of ice forming in a differentially heated cavity filled with water is studied by means of experiments and numerical simulations. We show that the main mechanism responsible for the ice shaping is the existence of a cold upward convective current in the system. Such a current is ascribed to the peculiar equation of state of water, i.e., the non-monotonous dependence of density with temperature. The precise form of the ice front depends on several factors, first the temperature difference across the cell which drives the convection, second the wall inclination with respect to the vertical, both of which are here explored. We propose a boundary-layer model and a buoyancy-intensity model which account for the main features of the ice morphology.
