In the framework of a multi-fluid axisymmetric hydrodynamic model, the interaction of a supersonic plasma jet containing nanoparticles with a flat substrate is investigated using computer simulation. In particular, the fluxes of nanoparticles on the substrate are studied at plasma inlet pressure P0=1...100 Torr. The results show that a shock wave is formed near the substrate, which affects the energy of nanoparticles and their fluxes on the substrate. The width of the region along the radius, where the flow of nanoparticles onto the substrate is essential, depends on the plasma pressure in the jet. At large values of plasma pressure (P0≥75 Torr) a cloud of nanoparticles with a sharp boundary is formedon the axis of the plasma jet near the substrate. Interacting with this cloud, nanoparticles moving in the plasma jet, lose directed energy and their flow on the substrate near the axis of the jet is zero.
The heating of nanoparticles in a low-pressure plasma jet was studied with the help of computer simulation. Modeling of the expansion of a plasma jet with a dispersed phase, which was a mixture of nanoparticles of two sizes, was carried out within the framework of a multi-fluid axisymmetric hydrodynamic model.As a result of the calculations, the spatial distributions of the plasma parameters at different times after the plasma jet injection were obtained. The simulation results show that the temperature of nanoparticles in the plasma jet depends not only on their size, but also on the percentage composition of the mixture of dust particles. The reason for this is the influence of the size of nanoparticles on the spatial distribution of ion concentration, which play a decisive role in the heating of dust particles due to recombination on their surfaces.
The article touches upon the participation of Great Britain in the Gulf war of 1990-1991. This war was one of the largest armed conflicts after the Second World War, in which Britain took part. The reaction of London to the actions of the regime of Saddam Hussein has been analyzed. The political and military aspects of the crisis development in Iraq have been outlined. The quick decision-making and activity of the UNO Council during the settlement of the Iraqi crisis have been unfolded. The UN has been adopting 12 resolutions per year in order to put an end to the occupation of Kuwait, to restore international peace and security in the region. The position and approach of the North Atlantic Alliance to resolving the Iraqi crisis has been researched. The importance of NATO diplomatic consultations and the rapid response to the crisis situation on the periphery of the Alliance territory, as well as the cooperation between Britain and its allies, first of all, the United States, have been revealed. The activities of the international coalition, mainly the NATO member states, where the leading place was represented by the British military, have been highlighted. Major military operations, such as Desert Shield, Desert Storm and Grunbi which liberated the Kuwaiti territory from the Iraqi forces have been analyzed.
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