Interfacial stability and deformation of two stratified power law fluids in plane poiseuille flow Part II. Interface deformation
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Numerical simulation of oil-water non-Newtonian two-phase stratified wavy pipe flow coupled with heat transfer
2018, Applied Thermal EngineeringCitation Excerpt :These two patterns have been observed by extensive experiments [17–20]. Several two-dimensional (2D) numerical studies on fully developed SS oil-water two-phase flow were found in literatures [21–24]. Elseth et al. [25] simulated the oil-water stratified turbulence flow by Volume of Fluid (VOF) method, but the results do not agree with the experiments.
Characteristics of stratified flows of Newtonian/non-Newtonian shear-thinning fluids
2017, International Journal of Multiphase FlowA combination of parabolized Navier–Stokes equations and level-set method for stratified two-phase internal flow
2017, International Journal of Multiphase FlowMotion of a power-law long drop in a capillary tube filled by a Newtonian fluid
2012, Chemical Engineering ScienceAnalytical and level-set method based numerical study on oil-water smooth/wavy stratified-flow in an inclined plane-channel
2012, International Journal of Multiphase FlowCitation Excerpt :Here, the validation is done for SS and WS flow. For SS flow, Table 1 shows an excellent agreement, of present analytical (discussed in Appendix A) and numerical results against the numerical result of Khomami (1990); for fully-developed maximum U-velocity, its Y-coordinate and interface-height. For periodically fully-developed WS flow in a channel, Fig. 3a–f shows good agreement between the present results and that obtained by Cao et al. (2004); for the instantaneous interface shape at a time instant, τ = 0.7, 2.1 and 2.8.
Effects of wall-heating on the linear instability characteristics of pressure-driven two-layer channel flow
2011, Chemical Engineering ScienceCitation Excerpt :Two-fluid flows are common in many practical applications, such as, the cleaning of first-moving consumer goods plants, transportation of crude oil in pipelines (Joseph et al., 1997), mixing of liquids using centerline injectors, up-stream of static mixers (Cao et al., 2003), and the removal of highly viscous or elasto-viscoplastic material adhering to pipes by using fast-flowing water streams (Regner et al., 2007). The instabilities of immiscible two-fluid Poiseuille flows in isothermal systems have been addressed by many authors via asymptotic (Yih, 1967; Yiantsios and Higgins, 1988a; Khomami, 1990a, 1990b) and linear stability analyses (Yiantsios and Higgins, 1988b; Hooper and Boyd, 1983; Boomkamp and Miesen, 1996; South and Hooper, 1999; Frigaard, 2001; Sahu et al., 2007; Sahu and Matar, 2010b), as well as experimental techniques (Kao and Park, 1972). The origin of the study of the interfacial instability is the early work of Yih (1967), who considered the stability of two-fluid flow to two-dimensional long-wave disturbances.