论文标题
非沉淀浅积云云：理论和直接数值模拟
Non-Precipitating Shallow Cumulus Clouds: Theory and Direct Numerical Simulation
论文作者
论文摘要
我们将积云云建模为瞬态的绝热羽流，并为研究浅云云的动力学研究提供了单流体公式。流体，空气，带有水蒸气和液态水，作为随着流动的标量。我们采用Boussinesq近似和Clausius-Clapeyron定律的简化形式进行相变。我们使用此公式来研究云云形成所需的环境条件。我们表明，环境中的温度失气率和环境的相对湿度对于决定何时形成积云至关重要。在这两个参数的相空间中，我们确定了分离积云云可以形成和无法形成的区域的边界。
We model cumulus clouds as transient diabatic plumes, and present a single-fluid formulation for the study of the dynamics of developing shallow cumulus clouds. The fluid, air, carries water vapour and liquid water as scalars that are advected with the flow. We employ the Boussinesq approximation and a simplified form of the Clausius-Clapeyron law for phase changes. We use this formulation to study the ambient conditions required for the formation of cumulus clouds. We show that the temperature lapse rate in the ambient and the relative humidity of the ambient are crucial in deciding when cumulus clouds form. In the phase-space of these two parameters, we determine the boundary that separates the regions where cumulus clouds can form and where they cannot.
