This paper proposes a more refined pressure-loss prediction model for core-annular flow which includes a slip ratio term that implicitly accounts for the buoyancy of the oil core.
First, criteria for existence of stable core flow are proposed, which show the essential role played by interfacial tension.
(2015) argued that the geomagnetic SV requires weak poloidal flow, which led them to conclude that the top of the core is weakly stratified.
Slugging flow, which appeared to be intrinsic to riser flow, took the form of alternating bands of core annular disperse flow and a slug with a particle-rich core.
However, if the coolant condition in the core is kept unchanged, increasing the core power by 50% requires the core flow rate also increase proportionally, which will give rise to the hydraulic lift-off, an important issue to be addressed.
This paper proposes a new experimental methodology which organically integrates core flow experiment with nuclear magnetic resonance (NMR) (NMR T2 spectrum and NMR image) and quantitative evaluation of minerals by scanning electron microscopy (QEMSCAN) to investigate alkali sensitivity damage mechanisms in a low-permeability reservoir.
Note that reducing dynamo efficiency by heterogeneous CMB heat flux is not trivial; another pattern may have the opposite effect, as was shown for ({Y_{2}^{2}}) heterogeneity which enhances helical core flow and hence improves dynamo efficiency (Sreenivasan 2009).
Alvarado and Marsden (1979) developed a correlation, which uses both capillary and core flow data for describing flow of non-Newtonian macroemulsions through porous media.
Indeed, it is crucial to model as accurately as possible the secular acceleration because it has a profound effect on the SV which in turn affects estimates of the liquid outer core flow, just below the Core-Mantle Boundary (CMB).
We selected the failures of all primary cooling system (PCS) pumps, which would cause the abrupt reduction of flow and the reversal of core flow.
