Inferring activity from the flow field around active colloidal particles using deep learning
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arXiv
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| Main Authors: | , , , , |
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| Format: | Preprint |
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2025
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| _version_ | 1866911125631664128 |
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| author | Mohapatra, Aditya Kumar, Aditya Deb, Mayurakshi Dhomkar, Siddharth Singh, Rajesh |
| author_facet | Mohapatra, Aditya Kumar, Aditya Deb, Mayurakshi Dhomkar, Siddharth Singh, Rajesh |
| contents | Active colloidal particles create flow around them due to non-equilibrium process on their surfaces. In this paper, we infer the activity of such colloidal particles from the flow field created by them via deep learning. We first explain our method for one active particle, inferring the $2s$ mode (or the stresslet) and the $3t$ mode (or the source dipole) from the flow field data, along with the position and orientation of the particle. We then apply the method to a system of many active particles. We find excellent agreements between the predictions and the true values of activity. Our method presents a principled way to predict arbitrary activity from the flow field created by active particles. |
| format | Preprint |
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arxiv_https___arxiv_org_abs_2505_10270 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Inferring activity from the flow field around active colloidal particles using deep learning Mohapatra, Aditya Kumar, Aditya Deb, Mayurakshi Dhomkar, Siddharth Singh, Rajesh Soft Condensed Matter Fluid Dynamics Active colloidal particles create flow around them due to non-equilibrium process on their surfaces. In this paper, we infer the activity of such colloidal particles from the flow field created by them via deep learning. We first explain our method for one active particle, inferring the $2s$ mode (or the stresslet) and the $3t$ mode (or the source dipole) from the flow field data, along with the position and orientation of the particle. We then apply the method to a system of many active particles. We find excellent agreements between the predictions and the true values of activity. Our method presents a principled way to predict arbitrary activity from the flow field created by active particles. |
| title | Inferring activity from the flow field around active colloidal particles using deep learning |
| topic | Soft Condensed Matter Fluid Dynamics |
| url | https://arxiv.org/abs/2505.10270 |