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雾化与喷雾
影响因子: 1.737 5年影响因子: 1.518 SJR: 0.814 SNIP: 1.18 CiteScore™: 2.2

ISSN 打印: 1044-5110
ISSN 在线: 1936-2684

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雾化与喷雾

DOI: 10.1615/AtomizSpr.2013006471
pages 567-587

STATIC AND DYNAMIC DROP FORMATION ON DOWNWARD-FACING NOZZLES

Mathias Etzold
FMP TECHNOLOGY GMBH, Am Weichselgarten 34, 91058 Erlangen, Germany
Franz Durst
FMP TECHNOLOGY GMBH, Am Weichselgarten 34, 91058 Erlangen, Germany
U. Acikel
FMP TECHNOLOGY GMBH, Am Weichselgarten 34, 91058 Erlangen, Germany
R. Gautam
FMP TECHNOLOGY GMBH, Am Weichselgarten 34, 91058 Erlangen, Germany
Michael Zeilmann
FMP TECHNOLOGY GMBH, Am Weichselgarten 34, 91058 Erlangen, Germany

ABSTRACT

Static drop formation on downward-facing nozzles was investigated, numerically and experimentally. A representation of the variation of the contact angle with respect to nozzle diameter and increasing drop volume, during quasistatic drop formation, was determined and experimentally verified. The condition for the formation of single drops is given. It is pointed out that this limit exists for dynamic drop formation on downward-facing nozzles. This formation is treated in an integral manner and the results are presented in an Ohnesorge−Reynolds diagram. The latter diagram is explained in detail, since it allows a generalization of the authors' experimental results. Experiments and corresponding theoretical results are described and show very good agreement.


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