Viscosity effects on Dean vortex membrane microfiltration

Design and evaluation of a continuous flow microwave pasteurization system for apple cider

“…The high viscosity of hot-pressed cider at 20 C results in a much lower Dean number as the cider enters the pasteurizer than for water and cold-pressed cider. This low Dean value due to high viscosity may indicate weaker Dean vortices (Kluge, Kalra, & Belfort, 1999) As the hot-pressed cider heats, its viscosity reduces as shown in Fig. 7a, and its Dean number increases thus increasing the effect of the secondary flow and mixing.…”

Heat transfer characteristics of a temperature-dependent-property fluid in shell and coiled tube heat exchangers

“…Laminar convective heat transfer in helically coiled tube heat exchangers is commonly encountered in a vast variety of applications including power plants, nuclear reactors, refrigeration and airconditioning systems, heat recovery systems, chemical processing; therefore, lots of studies have been devoted to investigate the heat transfer characteristics of these systems [1][2][3]. The secondary flow motion induced by the curvature effect and the resultant centrifugal force makes heat transfer coefficient greater than that in a straight pipe [4].…”

Non-Newtonian flow of highly-viscous oils in hydraulic components

“…On the other hand, the PMA sample consistently exhibits a comparable or even slightly increased cross-sectional vorticity compared to the reference oil for the range of the Reynolds-number values examined. As also suggested by the rheological analysis the specific sample only exhibits shear-thinning characteristics, which have been demonstrated to affect the vortical motion in curved tubes in an enhancing manner [46,47]. For completeness purposes, the averaged secondary flow field at the outlet of the 180 o -bend for the additised samples is presented in Fig.…”