Severe Slug
Mostrando 1-4 de 4 artigos, teses e dissertações.
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1. Uma proposta para o controle automático da repartida de poços operando por gas lift contínuo
The gas-lift wells restart process has high complexity. If the procedure is not carefully executed, the production liquid flowrate can show an oscillatory behaviour, called #severe slugs#. This situation is undesirable because it causes productivity loss, decreases oil-watergas separation process performance or can lead to the shutdown of the system. Nowaday
Publicado em: 2009
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2. PREVISÃO NUMÉRICA DE ESCOAMENTO BIFÁSICO EM TUBULAÇÕES UTILIZANDO O MODELO DE DESLIZAMENTO / NUMERICAL PREDICTION OF TWO-PHASE FLOW IN PIPELINE WITH THE DRIFT-FLUX MODEL
Na produção de gás e petróleo em campos de águas profundas são comumente encontrados trechos verticais de dutos (risers) na aproximação final à plataforma. Nesta configuração, podem ocorrer escoamentos bifásicos no regime de golfadas severas (severe slug) que gera alternância na produção da fase gasosa e líquida. Esta alternância é caracter
Publicado em: 2007
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3. Induction of neural crest in Xenopus by transcription factor AP2α
We report experiments with Xenopus laevis, using both intact embryos and ectodermal explants, showing that the transcription factor AP2α is positively regulated by bone morphogenetic protein (BMP) and Wnt signaling, and that this activation is an essential step in the induction of neural crest (NC). Ectopic expression of AP2α is sufficient to activate high
The National Academy of Sciences.
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4. A novel, putative MEK kinase controls developmental timing and spatial patterning in Dictyostelium and is regulated by ubiquitin-mediated protein degradation
We have identified a developmentally regulated, putative MEK kinase (MEKKα) that contains an F-box and WD40 repeats and plays a complex role in regulating cell-type differentiation and spatial patterning. Cells deficient in MEKKα develop precociously and exhibit abnormal cell-type patterning with an increase in one of the prestalk compartments (pstO), a co
Cold Spring Harbor Laboratory Press.