Holmboe instability
E650394
Holmboe instability is a type of shear-driven wave instability that occurs in stably stratified fluids, producing characteristic interfacial waves and mixing at density interfaces.
Statements (44)
| Predicate | Object |
|---|---|
| instanceOf |
fluid instability
ⓘ
hydrodynamic instability ⓘ interfacial wave instability ⓘ shear instability ⓘ |
| analyzedUsing |
linear stability theory
ⓘ
nonlinear numerical simulations ⓘ |
| appearsAs | cusped or horn-shaped interfacial waves in experiments and simulations ⓘ |
| associatedWith |
asymmetric wave patterns above and below the interface
ⓘ
phase-locked interaction between vorticity and density interface ⓘ |
| belongsTo | stratified shear flow phenomena ⓘ |
| characterizedBy |
counter-propagating interfacial waves
ⓘ
relatively weak overturning compared to Kelvin–Helmholtz instability ⓘ sharp density interface ⓘ |
| contrastedWith | Kelvin–Helmholtz instability NERFINISHED ⓘ |
| dependsOn | vertical profiles of velocity and density ⓘ |
| drivenBy |
shear across a density interface
ⓘ
velocity shear ⓘ |
| firstDescribedIn | 1960s ⓘ |
| hasEffect |
enhanced mixing across density interfaces
ⓘ
generation of small-scale turbulence near the interface ⓘ |
| hasGrowthMechanism | interaction between shear and stratification ⓘ |
| hasMode | interfacial wave mode ⓘ |
| hasName | Holmboe instability NERFINISHED ⓘ |
| hasWaveType | interfacial gravity waves modified by shear ⓘ |
| moreLikelyThan | Kelvin–Helmholtz instability in strongly stratified sharp-interface flows ⓘ |
| namedAfter | Jørgen Holmboe NERFINISHED ⓘ |
| observedIn |
field observations of stratified natural waters
ⓘ
laboratory stratified shear flow experiments ⓘ |
| occursAt | density interfaces ⓘ |
| occursIn |
density-stratified shear flows
ⓘ
stably stratified fluids ⓘ |
| occursWhen | Richardson number is order one or larger with sharp density interface NERFINISHED ⓘ |
| produces |
interfacial waves
ⓘ
mixing at density interfaces ⓘ |
| relevantTo |
internal wave dynamics
ⓘ
mixing in lakes ⓘ mixing in oceans ⓘ mixing in the atmosphere ⓘ transport of heat and tracers in stratified flows ⓘ |
| requires |
stable density stratification
ⓘ
sufficient velocity shear ⓘ |
| studiedIn |
atmospheric sciences
ⓘ
geophysical fluid dynamics ⓘ oceanography ⓘ |
Referenced by (1)
Full triples — surface form annotated when it differs from this entity's canonical label.