| | |
| | |
Stat |
Members: 3667 Articles: 2'599'751 Articles rated: 2609
07 February 2025 |
|
| | | |
|
Article overview
| |
|
Effect of fluid-colloid interactions on the mobility of a thermophoretic microswimmer in non-ideal fluids | Dmitry A. Fedosov
; Ankush Sengupta
; Gerhard Gompper
; | Date: |
1 Aug 2015 | Abstract: | Janus colloids propelled by light, e.g., thermophoretic particles, offer
promising prospects as artificial microswimmers. However, their swimming
behavior and its dependence on fluid properties and fluid-colloid interactions
remain poorly understood. Here, we investigate the behavior of a thermophoretic
Janus colloid in its own temperature gradient using numerical simulations. The
dissipative particle dynamics method with energy conservation is used to
investigate the behavior in non-ideal and ideal-gas like fluids for different
fluid-colloid interactions, boundary conditions, and temperature-controlling
strategies. The fluid-colloid interactions appear to have a strong effect on
the colloid behavior, since they directly affect heat exchange between the
colloid surface and the fluid. The simulation results show that a reduction of
the heat exchange at the fluid-colloid interface leads to an enhancement of
colloid’s thermophoretic mobility. The colloid behavior is found to be
different in non-ideal and ideal fluids, suggesting that fluid compressibility
plays a significant role. The flow field around the colloid surface is found to
be dominated by a source-dipole, in agreement with the recent theoretical and
simulation predictions. Finally, different temperature-control strategies do
not appear to have a strong effect on the colloid’s swimming velocity. | Source: | arXiv, 1508.0049 | Services: | Forum | Review | PDF | Favorites |
|
|
No review found.
Did you like this article?
Note: answers to reviews or questions about the article must be posted in the forum section.
Authors are not allowed to review their own article. They can use the forum section.
|
| |
|
|
|