Inner Cylinder Rotation
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. EXPERIMENTAL STUDY OF AXIAL FLOW THROUGH AND ANNULAR REGION WITH INNER CYLINDER ROTATION / ESTUDO EXPERIMENTAL DO ESCOAMENTO AXIAL ATRAVÉS DE REGIÃO ANULAR COM ROTAÇÃO DO CILINDRO INTERNO
The flow between concentric cylinders with an inner rotating cylinder with an imposed pressure-driven axial flow was studied experimentally. The radius ratio was (n) = 0, 64 and the aspect ration was (r) = 265. Friction factor and velocity fields were studied for four rotations of the inner cylinder and for laminar, transitional, and turbulent flow. Velocity
Publicado em: 2007
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3. PRESSURE DROP IN AXIAL FLOW THROUGH ANNULAR REGION WITH INNER CYLINDER ROTATION / QUEDA DE PRESSÃO EM ESCOAMENTO AXIAL ATRAVÉS DE REGIÃO ANULAR COM ROTAÇÃO DO CILINDRO INTERNO
The present work investigated the pressure drop generated by the flow through an annular configuration with rotation of the inner cylinder. The motivation for the work comes from the several industrial application of the configuration, such as chemical reactors, filters and in drilling operations for oil and gas wells. The experimental study was conducted in
Publicado em: 2005
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4. SECONDARY FLOW IN PARTIALLY-OBSTRUCTED ANNULAR SPACE WITH INNER CYLINDER ROTATION / ESCOAMENTO SECUNDÁRIO EM UM ANULAR PARCIALMENTE OBSTRUÍDO COM ROTAÇÃO DO CILINDRO INTERNO
The flow inside a horizontal annulus due to the inner cylinder rotation is studied. The bottom of the annular space is partially blocked by a plate parallel to the axis of rotation, thereby destroying the circumferential symmetry of the annular space geometry. This flow configuration is found in the drilling process of horizontal petroleum wells, where a bed
Publicado em: 2004
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5. Structure of the subunit c oligomer in the F1Fo ATP synthase: Model derived from solution structure of the monomer and cross-linking in the native enzyme
The structure of the subunit c oligomer of the H+-transporting ATP synthase of Escherichia coli has been modeled by molecular dynamics and energy minimization calculations from the solution structure of monomeric subunit c and 21 intersubunit distance constraints derived from cross-linking of subunits. Subunit c folds in a hairpin-like structure with two tra
The National Academy of Sciences.