Hydrodynamic interactions suppress deformation of suspension drops in Poiseuille flow

Details Hydrodynamic interactions suppress deformation of suspension drops in Poiseuille flow Hydrodynamic interactions suppress deformation of suspension drops in Poiseuille flow

2010-04-28

arxiv.org/abs/1004.5002v1

Physics

Fluid Dynamics

Scientific paper

Evolution of a suspension drop entrained by Poiseuille flow is studied numerically at a low Reynolds number. A suspension drop is modelled by a cloud of many non-touching particles, initially randomly distributed inside a spherical volume of a viscous fluid which is identical to the host fluid outside the drop. Evolution of particle positions and velocities is evaluated by the accurate multipole method corrected for lubrication, implemented in the {\sc hydromultipole} numerical code. Deformation of the drop is shown to be smaller for a larger volume fraction. At high concentrations, hydrodynamic interactions between close particles significantly decrease elongation of the suspension drop along the flow in comparison to the corresponding elongation of the pure-fluid drop. Owing to hydrodynamic interactions, the particles inside a dense-suspension drop tend to stay for a long time together in the central part of the drop; later on, small clusters occasionally separate out from the drop, and are stabilized by quasi-periodic orbits of the constituent non-touching particles. Both effects significantly reduces the drop spreading along the flow. At large volume fractions, suspension drops destabilize by fragmentation, and at low volume fractions, by dispersing into single particles.

Affiliated with

Also associated with

No associations

Rating

Hydrodynamic interactions suppress deformation of suspension drops in Poiseuille flow 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 Hydrodynamic interactions suppress deformation of suspension drops in Poiseuille flow, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Hydrodynamic interactions suppress deformation of suspension drops in Poiseuille flow will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-68750