An extension to a previously published work, this paper defines a new "diamond" orientation for the cubical-cavity benchmark problem in natural convection, and it presents new measurements on this as well as on a previously-treated orientation. Thus, measured were the average Nusselt number for an air-filled cubical cavity with two opposing isothermal faces and the remaining four sides having a linear temperature rise from the cold-face temperature to the hot-face temperature. The 95% confidence-limit uncertainties for Nusselt numbers (Nu) are around 1.2% for Rayleigh numbers, Ra, ranging from 10~4 to 3 x 10~8, and also for the "heating-from-the-side" orientation at Ra = 3 x 10~8. Thus the results are considered suitable for the testing of computational codes.
展开▼
机译：本文是对先前发表的工作的扩展，为自然对流中的立方腔基准问题定义了新的“菱形”方向，并针对此以及先前处理的方向提出了新的测量方法。因此，测量的是具有两个相对的等温面且其余四个侧面的线性温度从冷面温度升高到热面温度的充气立方腔的平均努塞尔数。 Nusselt数（Nu）的95％置信极限不确定性，对于Rayleigh数Ra约为1.2％，范围从10〜4到3 x 10〜8，并且对于“从侧面加热”方向Ra = 3 x 10〜8。因此，结果被认为适合于计算代码的测试。
展开▼
