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Analysis of Flow Characteristics and Effects of Turbulence Models for the Butterfly Valve

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Abstract
In the present study, the flow characteristics of butterfly valves with different sizes DN 80 (nominal diameter: 76.2 mm), DN 262 (nominal diameter: 254 mm), DN 400 (nominal diameter: 406 mm) were numerically investigated under different valve opening percentages. Representative two-equation turbulence models of two-equation k-epsilon model of Launder and Sharma, two-equation k-omega model of Wilcox, and two-equation k-omega SST model of Menter were selected. Flow characteristics of butterfly valves were examined to determine turbulence model effects. It was determined that increasing turbulence effect could cause many discrepancies between turbulence models, especially in areas with large pressure drop and velocity increase. In addition, sensitivity analysis of flow properties was conducted to determine the effect of constants used in each turbulence model. It was observed that the most sensitive flow properties were turbulence dissipation rate (Epsilon) for the k-epsilon turbulence model and turbulence specific dissipation rate (Omega) for the k-omega turbulence model.
Author(s)
김한상서형석최성웅
Issued Date
2021
Type
Article
Keyword
butterfly valvetwo-equation turbulencemodelvalve flow coefficientsensitivity coefficient
DOI
10.3390/app11146319
URI
https://oak.ulsan.ac.kr/handle/2021.oak/8812
https://ulsan-primo.hosted.exlibrisgroup.com/primo-explore/fulldisplay?docid=TN_cdi_doaj_primary_oai_doaj_org_article_19676a05567d4de7a4a47af9d34b19f0&context=PC&vid=ULSAN&lang=ko_KR&search_scope=default_scope&adaptor=primo_central_multiple_fe&tab=default_tab&query=any,contains,Analysis%20of%20Flow%20Characteristics%20and%20Effects%20of%20Turbulence%20Models%20for%20the%20Butterfly%20Valve&offset=0&pcAvailability=true
Publisher
APPLIED SCIENCES-BASEL
Location
스위스
Language
영어
ISSN
2076-3417
Citation Volume
11
Citation Number
14
Citation Start Page
6319
Citation End Page
6319
Appears in Collections:
Engineering > Aerospace Engineering
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