Performance of the cut‐cell method of representing orography in idealized simulations
Performance of the cut‐cell method of representing orography in idealized simulations
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DOI：
10.1002/asl2.465
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发表时间：
2014
影响因子：
3
通讯作者：
Beth Good;A. Gadian;Sarah‐Jane Lock;A. Ross
中科院分区：
文献类型：
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作者：
Beth Good;A. Gadian;Sarah‐Jane Lock;A. Ross
本文介绍了用切胞表示地形模型的几种试验：静息大气试验、横越山丘的平流试验和不同梯度山丘上的暖上升气泡试验。将测试结果与地形跟踪模型的结果进行了比较。结果表明，切割单元方法减少了与地形跟踪坐标相关的误差，在某些情况下大大减少了误差。在静止大气中，无论地形多么陡峭，切割细胞方法都不会在孤立的山丘周围产生气流。上升气泡测试的相对误差比地形跟随模拟小一个数量级。
Several tests of a model with a cut‐cell representation of orography are presented: a resting atmosphere test, advection across a hill and a warm rising bubble over hills with different gradients. The tests are compared with results from terrain‐following models. Results indicate that errors associated with terrain‐following coordinates are reduced, in some cases greatly reduced, with the cut‐cell approach. In a resting atmosphere, the cut‐cell approach does not generate flow around an isolated hill however steep the terrain. Relative errors in a rising bubble test are an order of magnitude smaller than terrain‐following simulations.