Concentric Annuli
Mostrando 1-5 de 5 artigos, teses e dissertações.
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1. The effect of the inner cylinder rotation on the fluid dynamics of non-Newtonian fluids in concentric and eccentric annuli
Helical flow in an annular space occurs during oil drilling operations. The correct prediction of flow of drilling fluid in an annular space between the wellbore wall and the drill pipe is essential to determine the variation in fluid pressure within the wellbore. This paper presents experimental and CFD simulation results of the pressure drop in the flow of
Braz. J. Chem. Eng.. Publicado em: 2014-12
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2. CFD predictions of drilling fluid velocity and pressure profiles in laminar helical flow
Fluid flow in annular spaces has received a lot of attention from oil industries, both in drilling operations and in petroleum artificial rising. In this work, through numerical simulation using the computational fluid dynamics (CFD) technique, the flow of non-Newtonian fluids through the annuli formed by two tubes in concentric and eccentric arrangements of
Brazilian Journal of Chemical Engineering. Publicado em: 2007-12
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3. Thermo-fluid dynamics to pseudoplastic fruit juices in cilindrical ducts and concentric annuli. / Termofluidodinamica de sucos de frutas pseudoplasticos em dutos cilindricos e anulos concentricos.
As mais importantes aplicações técnicas dos fatores de atrito e dos coeficientes convectivos de transferência de calor, bem como das propriedades térmicas e reológicas, estão nas análises e projetos de bombas, tubulações e trocadores de calor. Os dutos circulares e anulares constituem uma importante configuração geométrica para as indústrias e,
Publicado em: 2006
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4. A numerical solution for the entrance region of non-newtonian flow in annuli
Continuity and momentum equations applied to the entrance region of an axial, incompressible, isothermal, laminar and steady flow of a power-law fluid in a concentric annulus, were solved by a finite difference implicit method. The Newtonian case was solved used for validation of the method and then compared to reported results. For the non-Newtonian case a
Brazilian Journal of Chemical Engineering. Publicado em: 2003-06
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5. Comparison between one-dimensional uncoupled and convection-conduction conjugated approaches in finned surface heat transfer
This work studies the forced convection problem in internal flow between concentric annular ducts, with radial fins at the internal tube surface. The finned surface heat transfer is analyzed by two different approaches. In the first one, it is assumed one-dimensional heat conduction along the internal tube wall and fins, with the convection heat transfer coe
Journal of the Brazilian Society of Mechanical Sciences. Publicado em: 2000