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 : Haopeng Sun (검색결과 2 건)
- 무료
- 기관 내 무료
- 유료
-
Dynamic behavior of an ellipsoidal bubble contaminated by surfactant near a vertical wall
Enbo Ju,Runze Cai,Haopeng Sun,Ying Fan,Wenyi Chen,Jiao Sun 한국화학공학회 2022 Korean Journal of Chemical Engineering Vol.39 No.5
Adding a small amount of surfactant to gas-liquid two-phase flow can markedly change bubble behavior,which has crucial application value in nuclear energy, petrochemical, chemical, and environmental engineering. In thispaper, the dynamic behavior of a single ellipsoidal bubble (Re~800) contaminated by surfactant rising near a verticalwall in stagnant liquid is studied using the shadow method. The effects of different concentrations of sodium dodecylsulfate solution (100 ppm, 400 ppm, 800 ppm) and initial dimensionless distances on bubble dynamics were compared. The dynamic parameters, shape oscillation, force, and energy of the bubble were analyzed. The results show that thecritical initial dimensionless distance at which the collision occurs is decreased due to a dimensionless distance changefrom 3.3 to 0.23, accelerating the transition from zigzag to spiral movement. Transverse movement of the contaminatedbubble is restrained. Because of the Marangoni effect caused by the surfactant, the boundary condition changesfrom zero shear to non-zero shear, resulting in a decrease in velocity and an increase in the drag coefficient. As the surfactantconcentration increases, the lift coefficient does not significantly change with concentration variations. Theinfluences of the wall effect on velocity and drag gradually weaken. Comparing free-rising and collision conditions, theaspect ratio of the contaminated bubble is distinct from the regularity of a clean bubble. The surfactant also changes thewall-normal velocity frequency and symmetrical shape frequency and inhibits energy conversion during collision.
-
A Feasibility Research on the Mechanism of Cold Chain Business in Deppon Logistics
Yanni Li,Yunyun Xu,Baichao Gong,Haopeng Sun,Fuguang Zhao 보안공학연구지원센터 2016 International Journal of u- and e- Service, Scienc Vol.9 No.3
Cold chain distribution is always well-known as the “Mount Everest” in international logistics industry, while the rapid development in recent years of domestic meat, frozen food, cold drinks industry and dairy industry brought a leapfrog growth of cold chain logistics, which respectively stimulated the need for logistics outsourcing service from Third Party Logistics. Those companies demanding for exploiting cold chain business on one hand requires a complete set of refrigerated logistics chains, on the other hand also requires enterprises to establish a good and professional transport system with refrigerated operation equipment, which are precisely the weakness of manufacturing enterprises. Thus, outsourcing of cold chain logistics to a third party is the best choice for companies to focus on its core business. By analyzing the bulletins of International Cold Chain Logistics Summits, this paper shows the problems of cold chain industry in China and points out the potentials for its future development. It further analyzes the feasibility of launching cold chain business of Deppon Logistics. The purpose is to offer some suggestions to work out the barriers and set up a modern operation system under the big data age in Deppon.
연관 검색어 추천
이 검색어로 많이 본 자료
활용도 높은 자료
