Answers are grounded in this paper and cite their sources.
Coefficients for the annular orifice formed between a circular disk and a cylindrical tube are reported for twenty-one orifices having disk diameter to tube diameter ratios in the range of 0.95 to 0.996, and orifice length-to-width ratios from 0.118 to 33.3. The orifice Reynolds-number range is from 2.0 to 20,000 for both tangent and concentric orientations of the disk. Comparison with previous data indicates that the results also apply to the annular orifice formed when a rod extends through a circular hole in a plate. Theoretical and semi-empirical equations are developed to predict coefficients for annular orifices.
No takes yet. Share an insight, caveat, or question.
Bell et al. (1957) studied this question.
Synapse has enriched 10 related papers. Consider them for comparative context: