Abstract
Peristaltic transport of elliptic particles suspended in Newtonian fluids is numerically investigated in a planar channel formed between two flexible membranes. Numerical results were obtained under creeping-flow conditions for centered and off-center particles using the lattice Boltzmann method. The results demonstrate the importance of aspect ratio and initial inclination angle on peristaltic transport of solid particles. For a domain comprising just one wave, it was shown that, in free-pumping mode, circular particles move faster than elliptic particles and experience less shear stress. They also resist a larger adverse pressure gradient before they are finally brought to rest. Above a critical Reynolds number, however, elliptic particles are predicted to move faster than circular particles. The effect was attributed to the vulnerability of circular particles to hydrodynamic instability, which is exhibited by the particle detaching itself from the centerline, thereby adopting a longer trajectory. This is the first time that peristaltic transport of elliptic particles is being numerically studied, and the results can be used for designing peristalsis-based micro-swimmers or microfluidic systems deemed for single-cell studies.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
