http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
- 中文 을 입력하시려면 zhongwen을 입력하시고 space를누르시면됩니다.
- 北京 을 입력하시려면 beijing을 입력하시고 space를 누르시면 됩니다.
RISS 인기검색어
- 검색키워드
- 저자 : Kirkkopru (검색결과 1 건)
- 무료
- 기관 내 무료
- 유료
-
Inverse Design and Flow Distribution Analysis of Carreau Type Fluid Flow through Coat-Hanger Die
Oktay Yilmaz,Kadir Kirkkopru 한국섬유공학회 2020 Fibers and polymers Vol.21 No.1
An analytical/numerical method is revisited and proposed for process material specific design of coat-hanger dies. For this aim, both representative viscosity approach (RVA) and electrical network method (ENM) are employed incombination within an iterative calculation process. Under favour of RVA, any viscosity model from the family ofgeneralized Newtonian fluid models such as that of Carreau-Yasuda can be used within broad extrusion rate range in ENMwithout limitation in low and high values of shear rates. This provides great flexibility and accuracy in ENM which is arelatively simple and fast numerical method. First, this method is employed to design die geometry for a specificthermoplastic melt that provides uniform flow rate at the die exit. Later, the same method is modified and used to investigatethe effects of non-newtonian fluids with varying power-law indices on the die performance. Evaluation of the performance ofENM coupled with RVA (ENM-RVA) is made by computational fluid dynamics (CFD) analyses. CFD analyses indicated thatthe method is very successful in designing die geometry for a specific fluid. Flow distributions predicted by the method forvarious fluids are in accordance with those of CFD runs. The ENM-RVA is a design/analysis technique which can beemployed to see effects of material rheology and throughput on the coat-hanger die performance in a short time and can beused as an auxiliary tool which can provide the preliminary design geometry for the advanced design softwares working withoptimization algorithms.
연관 검색어 추천
이 검색어로 많이 본 자료
활용도 높은 자료
