ICTS:30580

Video URL

The Anomalous Long-Ranged Influence of an Inclusion in a Momentum-Conserving Active Fluid

The Anomalous Long-Ranged Influence of an Inclusion in a Momentum-Conserving Active Fluid

(2024). The Anomalous Long-Ranged Influence of an Inclusion in a Momentum-Conserving Active Fluid. SciVideos. https://youtube.com/live/3jnv4C6Gnbc

The Anomalous Long-Ranged Influence of an Inclusion in a Momentum-Conserving Active Fluid. SciVideos, Dec. 20, 2024, https://youtube.com/live/3jnv4C6Gnbc 

          @misc{ scivideos_ICTS:30580,
            doi = {},
            url = {https://youtube.com/live/3jnv4C6Gnbc},
            author = {},
            keywords = {},
            language = {en},
            title = {The Anomalous Long-Ranged Influence of an Inclusion in a Momentum-Conserving Active Fluid},
            publisher = {},
            year = {2024},
            month = {dec},
            note = {ICTS:30580 see, \url{https://scivideos.org/index.php/icts-tifr/30580}}
          }
Sriram Ramaswamy
Talk numberICTS:30580
Source RepositoryICTS-TIFR
Collection

Abstract

The far-field decay of the concentration of motile particles around a static inclusion is well studied in the case of “dry” active matter. We show here that the scenario is dramatically different when the viscous hydrodynamic interaction enters, especially if the object is polar in shape. Advection by fluid flow and diffusion enter on the same footing, a “marginality” that leads to a power-law decay exponent for the concentration varying continuously with a dimensionless measure of the force required to hold the inclusion in place, and a singular distinction between the axisymmetric and non-axisymmetric cases. We
hope our findings will inspire experimental studies on inclusions in swimmer suspensions. This work was done in collaboration with Thibaut Arnoulx de Pirey and Yariv Kafri.