An appropriate choice of gases (air, carbon dioxide and helium) coupled with low pressure conditions from atmospheric down to 50 mbar enables us to test whether gas viscosity is indeed a key determinant in dynamic wetting.
An appropriate choice of gases (air, carbon dioxide and helium) coupled with low pressure conditions from atmospheric down to 75 mbar enables us to test whether gas solubility is a key determinant in gas entrainment.
In this paper we used dip coating as the model experimental flow and report data on air entrainment velocity we measured with a series of silicone oils in a range of viscosities in a vacuum chamber where the pressure can be reduced from atmospheric down to a few mbar when the mean molecular free path of air is large and air ceases to have a viscosity.
Trip-hop, genre of atmospheric down-tempo music, influenced by movie sound tracks, 1970s funk, and cool jazz and usually created using samples.
It should be noted that it's also wonderfully atmospheric, right down to the closing glimpse of Isadora Duncan and her brother dancing with excitement through the Luxembourg Gardens in 1900.
We filmed out of a very small, 1950s cigarette factory in highly unfashionable Wapping, where rents were cheap, parking easy and atmospheric, run-down locations were two-a-penny.
As in stream ecosystems, wetland DIC is derived from several sources including the dissolution of carbonate, respiration by aquatic plants and heterotrophs by the consumption of organic matter, shallow groundwater inputs from elevated levels of soil CO2, and atmospheric draw-down (Wetzel 1992; Palmer et al. 2001).
The latest prognostications by James Hansen (who had a face-to-face meeting with Nick Clegg on this issue recently) suggest we need to get atmospheric CO2 levels down below present levels and we need to do it fast.
A strong climate-peace agreement would also include a program to plant vast numbers of native-species trees in the Middle East and the Mediterranean, to draw down atmospheric CO2, reduce desertification, and promote cooler and moister climates.
However, because of the enormous number of dirty coal-fired power plants in existence, the abundance of the fuel, and the fact that CCS technology could be used at biofuel-fired power plants to draw down atmospheric carbon dioxide, the technology deserves strong R&D support.
Scientists thought that by providing iron, a trace element required for growth, they could create large plankton blooms and draw down atmospheric carbon dioxide.
