Segré–Silberberg effect
E647522
The Segré–Silberberg effect is a fluid dynamics phenomenon in which particles suspended in laminar flow through a circular tube migrate to stable equilibrium positions at a characteristic radial distance from the tube wall.
Statements (46)
| Predicate | Object |
|---|---|
| instanceOf |
fluid dynamics phenomenon
ⓘ
inertial migration phenomenon ⓘ |
| appliesTo |
flow in circular tubes
ⓘ
laminar flow ⓘ pressure-driven pipe flow ⓘ |
| assumes | laminar flow regime ⓘ |
| causes | radial migration of particles ⓘ |
| characteristicFeature | equilibrium positions at a characteristic radial distance from tube wall ⓘ |
| contrastsWith | uniform particle distribution expected in Stokes flow ⓘ |
| dependsOn |
channel Reynolds number
ⓘ
flow velocity profile ⓘ fluid viscosity ⓘ particle Reynolds number ⓘ particle size relative to tube diameter ⓘ |
| doesNotOccurIn | creeping flow limit ⓘ |
| equilibriumCondition | net lateral force on particle equals zero ⓘ |
| field |
fluid dynamics
ⓘ
suspension mechanics ⓘ |
| firstReportedIn | 1961 ⓘ |
| flowCondition | moderate Reynolds number ⓘ |
| governingForces |
hydrodynamic lift forces
ⓘ
viscous drag forces ⓘ |
| influences | particle distribution across pipe cross-section ⓘ |
| involves |
finite Reynolds number flows
ⓘ
neutrally buoyant particles ⓘ suspended particles ⓘ |
| mechanism |
balance of inertial lift forces
ⓘ
interaction of shear-induced lift and wall-induced lift ⓘ |
| namedAfter |
A. Silberberg
NERFINISHED
ⓘ
G. Segré NERFINISHED ⓘ |
| notableFor | formation of discrete particle focusing rings ⓘ |
| observedIn |
rigid particles
ⓘ
spherical particles in water flow ⓘ |
| occursIn | Poiseuille flow NERFINISHED ⓘ |
| relatedTo |
inertial focusing
ⓘ
tubular pinch effect NERFINISHED ⓘ |
| requires |
nonzero fluid inertia
ⓘ
sufficient residence time for migration ⓘ |
| resultsIn | stable equilibrium positions of particles ⓘ |
| scale | occurs in both macro-scale pipes and microchannels ⓘ |
| typicalEquilibriumLocation |
about 0.6 times tube radius from centerline
ⓘ
annulus between tube center and wall ⓘ |
| usedIn |
cell sorting in microchannels
ⓘ
inertial microfluidics ⓘ particle focusing ⓘ particle separation ⓘ |
Referenced by (1)
Full triples — surface form annotated when it differs from this entity's canonical label.