144 research outputs found
On the Shape of Liquid Metal Droplets in Electromagnetic Levitation Experiments
We present calculations and measurements on the shape of liquid metal droplets in electromagnetic levitation experiments. A normal stress balance model was developed to predict the shapes of liquid metal droplets that will be obtained in a microgravity experiment to measure the viscosity and surface tension of undercooled metals. This model was tested by calculating the droplet shapes in containerless experiments conducted to determine the surface tension of liquid metals. Inconsistencies associated with the results of a previous paper are elucidated. The computational results of the mathematical model are compared with the results of ground-based experiments for two different metals. The importance of the ratio of electromagnetic skin depth-to-droplet radius to the accuracy of the mathematical model is discussed. A planned alternate approach to modeling the shape by consideration of the entire droplet rather than only the surface is presented. As an example of an application. the influence of the shape on the splitting of the surface oscillation modes of levitated liquid metal droplets is discussed
A identificação de competências na formação do enfermeiro na perspectiva de mudança de modelo assistencial
Social determinants of hospitalizations for ambulatory care sensitive conditions in Guarulhos, São Paulo
Instrumentos de avaliação de necessidades em saúde aplicáveis na estratégia de Saúde da Família
Bases metodológicas para a assistência de enfermagem em saúde coletiva, fundamentadas no materialismo histórico e dialético
The Brazilian policy for reduction of accidents and violence aligns with international perspectives?
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