Simulation of the Internal Wave of a Subsurface Vehicle in a Two-Layer Stratified Fluid
Sign Up to like & getrecommendations! Published in 2020 at "Journal of Ocean University of China"
DOI: 10.1007/s11802-020-4223-9
Abstract: Internal waves are one of the various phenomena that occur at sea, and they affect acoustic equipment and sea density measurement equipment. In this study, internal waves are simulated using computational fluid dynamics method in… read more here.
Keywords: subsurface; velocity; simulation internal; number ... See more keywords
Vortical structures and wakes of a sphere in homogeneous and density stratified fluid
Sign Up to like & getrecommendations! Published in 2021 at "Journal of Hydrodynamics"
DOI: 10.1007/s42241-021-0032-x
Abstract: Vortical structures and wakes of bluff bodies in homogenous and stratified environment are common and important in ocean engineering. Based on the Boussinesq approximation, a thermocline model is proposed to deal with the variable density… read more here.
Keywords: density stratified; wakes sphere; structures wakes; vortical structures ... See more keywords
Wave boundary layers in a stratified fluid
Sign Up to like & getrecommendations! Published in 2017 at "Journal of Fluid Mechanics"
DOI: 10.1017/jfm.2017.610
Abstract: We study so-called wave boundary layers (BLs) arising in a stably stratified fluid at large times. The BL is a narrow domain near the surface and/or bottom of the fluid; with increasing time, gradients of… read more here.
Keywords: boundary layers; velocity; horizontal velocity; buoyancy horizontal ... See more keywords
Inertial drag on a sphere settling in a stratified fluid
Sign Up to like & getrecommendations! Published in 2018 at "Journal of Fluid Mechanics"
DOI: 10.1017/jfm.2018.661
Abstract: We compute the drag force on a sphere settling slowly in a quiescent, linearly stratified fluid. Stratification can significantly enhance the drag experienced by the settling particle. The magnitude of this effect depends on whether… read more here.
Keywords: drag sphere; fluid inertial; sphere settling; drag ... See more keywords
Penetration of boundary-driven flows into a rotating spherical thermally stratified fluid
Sign Up to like & getrecommendations! Published in 2019 at "Journal of Fluid Mechanics"
DOI: 10.1017/jfm.2018.999
Abstract: Motivated by the dynamics within terrestrial bodies, we consider a rotating, strongly thermally stratified fluid within a spherical shell subject to a prescribed laterally inhomogeneous heat-flux condition at the outer boundary. Using a numerical model,… read more here.
Keywords: thermally stratified; boundary driven; driven flows; regime ... See more keywords
Unstable jets generated by a sphere descending in a very strongly stratified fluid
Sign Up to like & getrecommendations! Published in 2019 at "Journal of Fluid Mechanics"
DOI: 10.1017/jfm.2019.123
Abstract: The flow around a sphere descending at constant speed in a very strongly stratified fluid ( $Fr\lesssim 0.2$ ) is investigated by the shadowgraph method and particle image velocimetry. Unlike the flow under moderately strong… read more here.
Keywords: fluid; jet; stix x1d708; x1d708 ast ... See more keywords
Core mechanisms of drag enhancement on bodies settling in a stratified fluid
Sign Up to like & getrecommendations! Published in 2019 at "Journal of Fluid Mechanics"
DOI: 10.1017/jfm.2019.524
Abstract: Stratification due to salt or heat gradients greatly affects the distribution of inert particles and living organisms in the ocean and the lower atmosphere. Laboratory studies considering the settling of a sphere in a linearly… read more here.
Keywords: core mechanisms; fluid; mechanisms drag; drag enhancement ... See more keywords
Motion of an inertial squirmer in a density stratified fluid
Sign Up to like & getrecommendations! Published in 2020 at "Journal of Fluid Mechanics"
DOI: 10.1017/jfm.2020.719
Abstract: Abstract We investigate the self-propulsion of an inertial swimmer in a linearly density stratified fluid using the archetypal squirmer model which self-propels by generating tangential surface waves. We quantify swimming speeds for pushers (propelled from… read more here.
Keywords: density stratified; stratification; fluid; homogeneous fluid ... See more keywords
Settling velocity variation induced by a sphere moving across a two-layer stratified fluid with different rheological characteristics
Sign Up to like & getrecommendations! Published in 2023 at "RSC Advances"
DOI: 10.1039/d2ra08286a
Abstract: Particle settling in stratified fluids is widespread in chemical and pharmaceutical processes, and how to effectively regulate the particle velocity is the key to optimizing the above process technology. In this study, the settling of… read more here.
Keywords: stratified fluid; water; velocity; settling velocity ... See more keywords
Hydrodynamic interactions between swimming microorganisms in a linearly density stratified fluid.
Sign Up to like & getrecommendations! Published in 2021 at "Physical review. E"
DOI: 10.1103/physreve.103.013109
Abstract: Oceans and lakes sustain intense biological activity due to the motion of marine organisms, which has significant ecological and environmental impacts. The motion of individual organisms and their interactions with each other play a significant… read more here.
Keywords: density stratified; linearly density; density; stratification ... See more keywords
Internal wave turbulence in a stratified fluid with and without eigenmodes of the experimental domain
Sign Up to like & getrecommendations! Published in 2023 at "Physical Review Fluids"
DOI: 10.1103/physrevfluids.8.054802
Abstract: We present laboratory experiments on turbulence in a linearly stratified fluid driven by an ensemble of internal gravity waves which approaches statistical homogeneity and axi-symmetry. In a way similar to several recent experimental works, non-linearities… read more here.
Keywords: wave turbulence; stratified fluid; turbulence; internal wave ... See more keywords