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为提高住区微环境模拟时的计算效率,该文提出了用以代替两方程湍流模型的零方程湍流模型。该模型经风洞实验验证,可达到与当前实际工程中常用的标准k-ε模型相近的计算精度。同时,实际尺度的建筑上应用的结果表明:该零方程模型对网格的要求比标准k-ε模型更低;同等计算条件下,该模型可使计算时间显著减少。通过减少网格数量,加快计算速度,该模型可有效改善计算效率,可作为今后实际工程应用中标准k-ε模型的有效替代者。
In order to improve the computational efficiency of residential micro-environment simulation, this paper proposes a zero-equation turbulence model to replace the two-equation turbulence model. The model is verified by wind tunnel experiment, which can reach the calculation accuracy similar to the standard k-ε model commonly used in current engineering. At the same time, the results of practical application on the construction scale show that the zero-equation model has lower grid requirements than the standard k-ε model; under the same calculation conditions, the model can significantly reduce the computation time. By reducing the number of grids and speeding up the calculation, the model can effectively improve the computational efficiency and can be used as an effective substitute for the standard k-ε model in practical engineering applications in the future.