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Effects of turbulence and number density on the drag coefficient of droplets (1991)

Kamemoto, D. Y. ; Rudoff, R. C. ; Bachalo, W. D.

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Publication Date: 2019-06-28

Description: Droplet drag coefficients for polydispersed drops are determined via the behavior of drops decelerating on the stagnation streamline of a cylinder with an afterbody mounted in a wind tunnel test section. A variety of velocity, turbulence levels, and droplet number densities were studied. A force balance equation technique was used to determine drag coefficient. For the levels of number density, up to 700/cc, and turbulence, up to about 7 percent, no definite effects were seen. However, the smallest drops in the high turbulence case showed some evidence of drop-turbulence and/or drop-drop interactions. The drag results that were developed for this set of measurements agreed well with other empirical relations previously determined.

Keywords: FLUID MECHANICS AND HEAT TRANSFER

Type: AIAA PAPER 91-0074

Format: text

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