Physics – Fluid Dynamics
Scientific paper
2012-02-23
Physics of Fluids (2012) 1
Physics
Fluid Dynamics
Scientific paper
Fluid and solute transfer in X-junctions between straight channels is shown to depend critically on the junction angle in the Stokes flow regime. Experimentally, water and a water-dye solution are injected at equal flow rates in two facing channels of the junction: Planar Laser Induced fluorescence (PLIF) measurements show that the largest part of each injected fluid "bounces back" preferentially into the outlet channel at the lowest angle to the injection; this is opposite to the inertial case and requires a high curvature of the corresponding streamlines. The proportion of this fluid in the other channel decreases from 50% at 90\degree to zero at a threshold angle. These counterintuitive features reflect the minimization of energy dissipation for Stokes flows. Finite elements numerical simulations of a 2D Stokes flow of equivalent geometry con rm these results and show that, below the threshold angle 33.8\degree recirculation cells are present in the center part of the junction and separate the two injected flows of the two solutions. Reducing further leads to the appearance of new recirculation cells with lower flow velocities.
Auradou Harold
Cachile Mario
Gomba Juan M.
Hulin Jean-Pierre
Talon Laurent
No associations
LandOfFree
Stokes flow paths separation and recirculation cells in X-junctions of varying angle does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Stokes flow paths separation and recirculation cells in X-junctions of varying angle, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Stokes flow paths separation and recirculation cells in X-junctions of varying angle will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-77520