Journal
PHYSICAL REVIEW LETTERS
Volume 102, Issue 9, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.102.094503
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Funding
- NIBIB [P41 EB002503]
- American Cancer Society [PF-07-237-01-CCE]
- NIH [F32 EB007901]
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Nonlinearity in finite-Reynolds-number flow results in particle migration transverse to fluid streamlines, producing the well-known tubular pinch effect in cylindrical pipes. Here we investigate these nonlinear effects in highly confined systems where the particle size approaches the channel dimensions. Experimental and numerical results reveal distinctive dynamics, including complex scaling of lift forces with channel and particle geometry. The unique behavior described in this Letter has broad implications for confined particulate flows.
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