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Abstract
AbstractForm, shear, and total drag have been studied in the 2,500 to 65,000 range of Reynolds number over a wide range of porosity by using the data of Thodos and co‐workers. The effect of Reynolds number was found to be the −0.14 power for form drag, the −0.19 power for total drag, and the −0.5 and highe power for shear drag, so that the ratio of shear drag to total drag decreased from about 16% to less than 5% with increasing Reynolds numbers. For the 2,500 to 6,000 range of Reynolds number, experimental evidence supports the apparently analogous behavior between average shear drag and average heat flux. Limitations and related evidence of this behavior are also discussed. Methods are suggested for estimating drag ratios and coefficients by using the correlation of this work.
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