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各位前辈好！ 我模拟的是一个室外风热环境问题，建筑表面对天空应该是有长波辐射的，对周边其他建筑物也有。根据网上资料解释在壁面编辑的辐射模型设置中，internal emissivity是对计算域内辐射，external emissivity是对计算域外辐射。我这种情况是不是应该把external emissivity设置为0，internal emissivity处根据建筑外表面材料设置。这样设置保证了多个建筑间的表面有相互辐射？但向天空辐射长波还能保证吗？
感谢各位前辈解答！
What's the differences between the external emissivity and the internal emissivity -- CFD Online Discussion Forums (11_10_2022 8_53_17 PM).html
