Slip flow over structured surfaces with entrapped microbubbles

Details Slip flow over structured surfaces with entrapped microbubbles Slip flow over structured surfaces with entrapped microbubbles

2008-01-09

arxiv.org/abs/0801.1448v2

Phys. Rev. Lett. 100, 246001 (2008)

Physics

Condensed Matter

Soft Condensed Matter

4 pages, 4 figures. v2: revised version, to appear in Phys. Rev. Lett

Scientific paper

10.1103/PhysRevLett.100.246001

On hydrophobic surfaces, roughness may lead to a transition to a superhydrophobic state, where gas bubbles at the surface can have a strong impact on a detected slip. We present two-phase lattice Boltzmann simulations of a Couette flow over structured surfaces with attached gas bubbles. Even though the bubbles add slippery surfaces to the channel, they can cause negative slip to appear due to the increased roughness. The simulation method used allows the bubbles to deform due to viscous stresses. We find a decrease of the detected slip with increasing shear rate which is in contrast to some recent experimental results implicating that bubble deformation cannot account for these experiments. Possible applications of bubble surfaces in microfluidic devices are discussed.

Affiliated with

Also associated with

No associations

Rating

Slip flow over structured surfaces with entrapped microbubbles 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 Slip flow over structured surfaces with entrapped microbubbles, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Slip flow over structured surfaces with entrapped microbubbles will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-670257