Motion of an active particle in a linear concentration gradient
نویسندگان
چکیده
Janus particles self-propel by generating local tangential concentration gradients along their surface. These are present in a thin layer whose thickness is small compared to the particle size. Chemical asymmetry surface prerequisite generate chemical gradient, which gives rise diffusioosmotic flows region around particle. This results an effective slip on observed "swimming" motion of freely suspended even absence externally imposed gradients.Motivated chemotactic behaviour biological counterparts(such as sperm cells, neutrophils, macrophages, bacteria etc.), sense and respond external gradients, current work aims at developing theoretical framework study linear gradient. The gradient with self-generated determines swimming velocity orientation particle.The dominance each these effects characterised non-dimensional activity number A. modelled having different mobility coefficient two halves.Using Lorentz Reciprocal theorem, analytical expression for rotational translational obtained. helps us divide parameter space into four regions where exhibits trajectories.
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ژورنال
عنوان ژورنال: Physics of Fluids
سال: 2021
ISSN: ['1527-2435', '1089-7666', '1070-6631']
DOI: https://doi.org/10.1063/5.0043578