Flow field analysis of columnar vortex by How, Wai Hong.

“…The 2-D velocity fields were projected on the PIV images to show the occurrence of flow divergence and recirculation zones. The vorticity fields were also created to support the analysis. …”
Get full text

Turbulence-induced secondary flows in straight open channel with imposed transverse bed non-uniformities by Wang, Zhiqian

“…This study aims to investigate time-mean characteristics of open channel flows subject to steady large-scale longitudinal vorticity, which are generated by longitudinal bedforms. …”
Get full text

Review of Experimental Work in Biomimetic Foils by Triantafyllou, Michael S., Techet, Alexandra H., Hover, Franz S.

“…This review focuses primarily on experimental studies on some of the, at least partially understood, mechanisms, which include 1) the formation of streets of vortices around and behind two- and three-dimensional propulsive oscillating foils; 2) the formation of vortical structures around and behind two- and three-dimensional foils used for maneuvering, hovering, or fast-starting; 3) the formation of leading-edge vortices in flapping foils, under steady flapping or transient conditions; 4) the interaction of foils with oncoming, externally generated vorticity; multiple foils, or foils operating near a body or wall.…”
Get full text

An experimental study on vortex-rings colliding with surfaces with micro-features by Sanjay, Godsay Nikhil

“…Time-resolved particle-image velocimetry (TR-PIV) used to visualize the flow and obtain velocity and vorticity measurements show that a larger post diameter leads to faster transition to incoherence of the primary vortex ring. …”
Get full text

Harnessing Instability Mechanisms in Airfoil Flow for Data-Driven Forecasting of Extreme Events by Barthel, Benedikt, Sapsis, Themistoklis P.

“…Through a wavelet and spectral analysis of the pressure and vorticity, we find that the extreme events arise due to the instability of a specific frequency component distinct from the vortex shedding mode. …”
Get full text

Superior cooling performance of a single channel hybrid magnetofluidic cooling device by Varma, Vijaykumar Babulalji, Pattanaik, M. S., Cheekati, S. K., Ramanujan, Raju Vijayaraghavan

“…The high cooling performance of our device was found to be due to high vorticity and mixing. Our MFC device is useful for transferring waste heat load from a variety of systems. …”
Get full text

Numerical investigations on vortex-ring collisions with heated sphere by Hoong, Jun Fong

“…Due to the opposite vorticity between secondary/tertiary ring with primary vortex ring, the secondary/tertiary hairpin vortices wrap around the primary vortex ring, initiating azimuthal stability and leads to the breakdown to turbulence. …”
Get full text

Enhanced energy extraction in small-scale wind turbines through slot-based passive blowing by Akhter, Md. Zishan, Ali, Ahmed Riyadh, Jawahar, Hasan Kamliya, Omar, Farag Khalifa, Elnajjar, Emad

“…The slot-flow also reduces radial flow and tip-vorticity anomalies along the blade. Overall, flow control enhancement achieved by the slotted blade significantly boosts the annual energy production of the wind turbine.…”
Get full text

Modelling entrainment volume due to surface-parallel vortex interactions with an air–water interface by Hendrickson, Kelli, Yu, Xiangming, Yue, Dick K.P.

“…We identify a new parameter, a circulation flux Froude number 𝐹𝑟2Ξ = |Γ|𝑊/𝑎2𝑔, that predicts the dimensionless volume ∀ of entrained air initiated by a coherent vortical structure of circulation Γ, effective radius 𝑎, vertical rise velocity𝑊 with gravity 𝑔. …”
Get full text

Behaviors of floating droplet by Kan, Kah Hou

“…Investigation reveals the formation and transition of flow pattern and vorticity originates from the complex thermo-solutal Marangoni convection induced by the evaporating cap. …”
Get full text

Near-field dynamics of parallel twin jets in cross-flow by Zang, Bin, New, Tze How

“…Moreover, as the separation distance decreases to 1.5D, the twin jets interact closer to the jet exit such that organized leading-edge and lee-side vortices are present along the symmetry plane. Cross-stream results indicate that the pair of inner vortices associated with the two resulting CVPs is being induced to move towards each other along the symmetry plane, where their opposite-signed vorticities annihilate with each other eventually. …”
Get full text
Get full text

Non-newtonian fluids and droplets in microchannels by Huang, Yi

“…Flow fields and the related vorticity distributions were used for flow characterization. …”
Get full text

Phase diagram of superconducting vortex ratchet motion in a superlattice with noncentrosymmetry by Li, Shengyao, Zhang, Lijuan, Huang, Ke, Ye, Chen, Xing, Tingjing, Yang, Liu, Yang, Zherui, Qiang Zhu, Sun, Bo, Wang, Xueyan, Wang, Renshaw Xiao

“…Ratchet motion of superconducting vortices, which is a directional flow of vortices in superconductors, is highly useful for exploring quantum phenomena and developing superconducting devices, such as superconducting diode and microwave antenna. …”
Get full text

A numerical simulation study on vortex-ring collisions upon arbitrary solid boundary by Leong, Sheng Yuan

“…Future research can be conducted to understand more about the formation and breakdown of small scale vortices at the near-wall region.…”
Get full text

Liquid crystal spiral phase plate : design, fabrication and characterization by Wang, Qin

“…Optical vortices have both theoretical and application value, and have attracted many research interests. …”
Get full text

Aerodynamics of unconventional airfoils by Ng, Bing Feng.

“…It will study the beneficial effects of vortices to enhance lift through both Static and Dynamic Leading Edge Vortices (LEVs). …”
Get full text

Localised and bifurcating structures in planar shear flows by Wang, Zhe

“…Turbulent spots in planar shear flows are always accompanied by the presence of (i) the quadrupolar flows outside the spot; and (ii) the counter-rotating streamwise vortices inside the spot. In the present thesis, those flow structures, i.e. quadrupolar flows and streamwise vortices have been treated analytically : By exploiting the geometric scale separation inscribed in all planar shear flows, equations governing the large-scale flow surrounding turbulent spots has been derived from the Navier-Stokes equations and solved analytically. …”
Get full text

Cylinder-wall interference effects on finite-length wavy cylinders at subcritical Reynolds number flows by New, T. H., Shi, Shengxian., Liu, Yingzheng.

“…Vortex-shedding behaviour of smaller-wavelength wavy cylinders has also been observed to be considerably less sensitive to variations in the physical configurations, due to the formation of multiple streamwise vortices at the saddles. The presence of these coherent streamwise vortices is postulated to play a key role in significantly reducing flow-altering effects associated with the end-walls.…”
Get full text
Get full text

Particle dean migration in short arcuated microchannels by Ishaq Idrus Khan Surattee

“…With the same channel length and flow conditions, particle migration distance was the largest for the channel with the smallest radius (smallest Dean number), which indicates the presence of stronger Dean vortices to induce particle lateral migration. Interestingly, comparison between half loop channel and one loop channel at the same downstream distance showed that bead migration distance was greater in the one loop channel, which suggests that the backpropagation of pressure gradient from downstream flow towards upstream Dean vortices may alter their strength and resultant particle lateral migration. …”
Get full text

Investigation of wing rock on delta wing part 2 : dynamic characteristics by Wong, Charles Junxin.

“…While a digital SLR is used to notice the trend of the vortices from the dye flow visualization and the wing rock phenomenon.…”
Get full text