# Contactless Precision Steering of Particles in a Fluid inside a Cube with Rotating Walls

arXiv: https://arxiv.org/abs/2506.15958 · HTML: https://mlsanity.com/paper/2506.15958/

## Key facts

- Cited by 1 papers in the map (data through 14 Oct 2026).
- Builds on 4 of its 45 references that are in the map.
- First posted on arXiv 19 Jun 2025.

## Builds on (most cited first, 4 of 4)

- [Flow reconstruction by multiresolution optimization of a discrete loss with automatic differentiation](https://mlsanity.com/paper/2303.04679/) (2023)
- [Optimal Navigation in Microfluidics via the Optimization of a Discrete Loss](https://mlsanity.com/paper/2506.15902/) (2025)
- [Computing foaming flows across scales: from breaking waves to microfluidics](https://mlsanity.com/paper/2103.01513/) (2021)
- [The control of particles in the Stokes limit](https://mlsanity.com/paper/2105.13550/) (2021)

## Built on by (most cited first, 1 of 1)

- [Bayesian Inference for PDE-based Inverse Problems using the Optimization of a Discrete Loss](https://mlsanity.com/paper/2510.15664/) (2025)

## Abstract (arXiv)

Contactless manipulation of small objects is essential for biomedical and chemical applications, such as cell analysis, assisted fertilisation, and precision chemistry. Established methods, including optical, acoustic, and magnetic tweezers, are now complemented by flow control techniques that use flow-induced motion to enable precise and versatile manipulation. However, trapping multiple particles in fluid remains a challenge. This study introduces a novel control algorithm capable of steering multiple particles in flow. The system uses rotating disks to generate flow fields that transport particles to precise locations. Disk rotations are governed by a feedback control policy based on the Optimising a Discrete Loss (ODIL) framework, which combines fluid dynamics equations with path objectives into a single loss function. Our experiments, conducted in both simulations and with the physical device, demonstrate the capability of the approach to transport two beads simultaneously to predefined locations, advancing robust contactless particle manipulation for biomedical applications.