TY - JOUR

T1 - Reynolds-Number Effect on the Flow Structure in a Deterministic Lateral Displacement (DLD) Microfluidic Chip

AU - Kovalev, A. V.

AU - Turkiya, G. R.

AU - Shestakov, M. V.

AU - Yagodnitsyna, A. A.

N1 - Kovalev, A.V., Turkiya, G.R., Shestakov, M.V. et al. Reynolds-Number Effect on the Flow Structure in a Deterministic Lateral Displacement (DLD) Microfluidic Chip. J Appl Mech Tech Phy 66 (Suppl 1), S19–S25 (2025). This work is supported by Russian Science Foundation (project no. 24-79-10291).

PY - 2025/12

Y1 - 2025/12

N2 - This study presents a comprehensive experimental and numerical investigation into the effects of Reynolds number (Re) on flow behavior in deterministic lateral displacement (DLD) devices. While conventional DLD operation typically occurs at low Reynolds numbers (Re < 1) where viscous forces dominate, this research systematically explores the transition to higher Re regimes (0.04 Re 66.7) to address the critical need for increased throughput in practical applications. The results demonstrate that increasing Reynolds number significantly alters flow profiles, with the emergence of recirculating vortices behind posts at Re 50 and notable streamline narrowing, both factors reducing the effective critical diameter () for particle separation. These findings reveal the limitations of traditional models, which remain accurate only in the low Re regime prior to vortex formation.

AB - This study presents a comprehensive experimental and numerical investigation into the effects of Reynolds number (Re) on flow behavior in deterministic lateral displacement (DLD) devices. While conventional DLD operation typically occurs at low Reynolds numbers (Re < 1) where viscous forces dominate, this research systematically explores the transition to higher Re regimes (0.04 Re 66.7) to address the critical need for increased throughput in practical applications. The results demonstrate that increasing Reynolds number significantly alters flow profiles, with the emergence of recirculating vortices behind posts at Re 50 and notable streamline narrowing, both factors reducing the effective critical diameter () for particle separation. These findings reveal the limitations of traditional models, which remain accurate only in the low Re regime prior to vortex formation.

KW - DLD

KW - flow structure

KW - micro-PIV

KW - microfluidics

UR - https://www.scopus.com/pages/publications/105035444481

UR - https://www.mendeley.com/catalogue/40b08514-52e4-32c5-87cf-46fcec9c3cac/

U2 - 10.1134/S0021894425700786

DO - 10.1134/S0021894425700786

M3 - Article

VL - 66

SP - S19-S25

JO - Journal of Applied Mechanics and Technical Physics

JF - Journal of Applied Mechanics and Technical Physics

SN - 0021-8944

IS - Suppl 1

ER -