How inertial lift affects the dynamics of a microswimmer in Poiseuille flow

Abstract The transport of motile microorganisms is strongly influenced by fluid flows that are ubiquitous in biological environments. Here we demonstrate the impact inertia. We analyze dynamics a microswimmer pressure-driven Poiseuille flow, where inertia small but non-negligible. Using perturbation theory and reciprocal theorem, show addition to classical inertial lift passive particles, active nature generates ‘swimming lift’, which evaluate for neutral pusher/puller-type swimmers. Accounting engenders rich spectrum complex including bistable states, tumbling coexists with stable centerline swimming or swinging. sensitive swimmer’s hydrodynamic signature goes well beyond findings at vanishing Our work will have non-trivial implications on dispersion suspensions microchannels.