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RISS 인기검색어
- 검색키워드
- 저자 : Zhiying Zheng (검색결과 2 건)
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Lu Wang,Zhiying Zheng,Weihua Cai,Fengchen Li 한국유변학회 2020 Korea-Australia rheology journal Vol.32 No.1
To explore the drag-reducing characteristics of turbulent channel flows with surfactant additive at relatively high Reynolds number from the perspectives of energy spectrum and multi-scale resolution, the two-dimensional fluctuation velocity fields of turbulent channel flows with/without surfactant additive at Reynolds number of Re = 590 obtained by large eddy simulation are decomposed by two-dimensional proper orthogonal decomposition (POD) and wavelet transform (WT). POD results show that the low-order eigenmode occupying most energy can be used to capture large-scale vortex structures, and fewer eigenmodes can be employed to capture coherent structures (CSs) in surfactant solution case compared with that in the Newtonian fluid. The spatial structures depicted by POD eigenmode state that buffer layer has a tendency to move towards the center of the channel in surfactant solution. Through wavelet analysis of fluctuation velocity fields in the streamwise-wall-normal planes, it is found that CSs mainly distribute in the near-wall region and the amount of CSs is smaller in surfactant solution. The results of local Reynolds shear measure (LRM) show that local contribution of CSs to the intermittency in turbulent channel flow of surfactant solution decreases, indicating the inhibition of intermittency by surfactant additive. In order to investigate the drag-reducing characteristics at different locations along the wall-normal direction, the fluctuation velocity fields in the streamwise-spanwise planes at different wall-normal locations are decomposed by two-dimensional WT. The results show that surfactant additive mainly affects the flow in the near-wall region (especially in the buffer layer) and thus induces drag reduction effect.
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Women’s revealing Halloween costumes: other-objectification and sexualization
Sharron J. Lennon,Zhiying Zheng,Aziz Fatnassi 한국의류학회 2016 Fashion and Textiles Vol.3 No.1
Women are depicted in revealing dress in the media and the depictions have costs such as objectification. Objectification theory explains that women in Westernized cultures are looked at, evaluated, and potentially objectified by others. Accordingly, objectifying gaze (by others) evokes self-objectification which has effects such as habitual body and appearance monitoring. According to the theory being objectified by others precedes self-objectification, which suggests that objectification by others could be more prevalent than self-objectification and potentially just as harmful. Researchers have found that self-objectification and other-objectification can be induced by revealing dress manipulations that vary in tightness or body coverage. We studied Halloween costumes as a site for objectification of others. In Study 1, 124 pairs of men’s and women’s Halloween costumes were content analyzed. Women’s costumes were significantly more revealing than men’s in tightness and body coverage. Since sexual objectification in the media is assessed by the presence of revealing dress in media depictions, we reasoned that women’s revealing Halloween costumes could be sexually objectifying. In Study 2, 295 participants rated women wearing revealing or non-revealing costumes in an online experiment. Women wearing revealing costumes were sexually objectified by participants. Although men rated costumed women higher on the sexually objectifying traits than women, both men and women objectified the costumed women in the revealing dress condition. Dress researchers may wish to apply objectification theory to re-interpret and explain early research on revealing dress.
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