Hydrophobic islands/patterns on a hydrophilic substrate could be employed to enhance boiling heat transfer,however the underlying mechanisms are far from clear.We perform boiling experiments on a copper wire coated wi...Hydrophobic islands/patterns on a hydrophilic substrate could be employed to enhance boiling heat transfer,however the underlying mechanisms are far from clear.We perform boiling experiments on a copper wire coated with superhydrophobic micropatterns(contact angle>170°).The copper wire is as fine as 150μm in diameter,greatly facilitating the observation of the bubble dynamic details.With the heat flux increasing,four regimes are characterized based on the bubble behavior.The superhydrophobic micropatterns are found to play critical roles in bubble formation and distribution as well as the interactions.展开更多
In order to verify the effectiveness of electrolytic treatment on ships’ ballast water, experiments are carried out by a pilot system in laboratory. The raw seawater and seawater with different concentrations of diff...In order to verify the effectiveness of electrolytic treatment on ships’ ballast water, experiments are carried out by a pilot system in laboratory. The raw seawater and seawater with different concentrations of different algae are simulated as ships’ ballast water. The algae in the raw seawater can be killed if it is treated by electrolysis with an initial residual chlorine concentration of 5 mg/L. If the seawater with one kind of algae (Nitzschia closterum, Dicrateria spp., or Pyramidomonnas sp.105cells/mL) is treated by electrolysis with an initial residual chlorine concentration of 5 mg/L, the alga can be sterilized. If the seawater with one kind of algae (Dunaliella sp., Platymonas or Chlorella spp.) is directly treated by electrolyzing with an initial residual chlorine concentration of 4 mg/L, the instant mortality changes with the concentration of different algae. However, after 72 hours, in all treated samples, there are no live algal cells found.展开更多
基金Supported by the National Natural Science Foundation of China under Grant No 51276003Common Development Fund of Beijingthe Dalian Science and Technology Foundation(2011J21DW005).
文摘Hydrophobic islands/patterns on a hydrophilic substrate could be employed to enhance boiling heat transfer,however the underlying mechanisms are far from clear.We perform boiling experiments on a copper wire coated with superhydrophobic micropatterns(contact angle>170°).The copper wire is as fine as 150μm in diameter,greatly facilitating the observation of the bubble dynamic details.With the heat flux increasing,four regimes are characterized based on the bubble behavior.The superhydrophobic micropatterns are found to play critical roles in bubble formation and distribution as well as the interactions.
文摘In order to verify the effectiveness of electrolytic treatment on ships’ ballast water, experiments are carried out by a pilot system in laboratory. The raw seawater and seawater with different concentrations of different algae are simulated as ships’ ballast water. The algae in the raw seawater can be killed if it is treated by electrolysis with an initial residual chlorine concentration of 5 mg/L. If the seawater with one kind of algae (Nitzschia closterum, Dicrateria spp., or Pyramidomonnas sp.105cells/mL) is treated by electrolysis with an initial residual chlorine concentration of 5 mg/L, the alga can be sterilized. If the seawater with one kind of algae (Dunaliella sp., Platymonas or Chlorella spp.) is directly treated by electrolyzing with an initial residual chlorine concentration of 4 mg/L, the instant mortality changes with the concentration of different algae. However, after 72 hours, in all treated samples, there are no live algal cells found.
