Results 171 to 180 of about 8,927 (215)
Some of the next articles are maybe not open access.
Dean vortices with wall flux in a curved channel membrane system
Journal of Membrane Science, 1993Abstract The foremost limitation of performance in using pressure-driven membrane processes for filtration and fractionationis the build-up and deposit of dissolved and suspended solutes onto the membrane surface. Since fluid instabilities are extremely effective in depolarizing solute build-up, we investigate the possibility of using Dean vortices ...
Kun Yong Chung +2 more
openaire +1 more source
The Effect of Negative Spanwise Rotation on Dean Vortices
Journal of Fluids Engineering, 1997A finite-volume numerical analysis is performed to examine effect of spanwise rotation on Dean vortices. The specific problem considered is fully developed flow in a square channel with streamwise curvature and spanwise rotation in a negative sense, i.e., the Coriolis force counteracts the centrifugal force. The rotation of the channel is found to have
openaire +3 more sources
Process intensification by exploiting Dean vortices in catalytic membrane microreactors
Chemical Engineering Science, 2017Abstract In this work, a mathematical model is developed for a heterogeneously catalyzed reaction in a porous membrane micro-reactor. Hydrogenation of an aqueous nitrite contaminant in water is analyzed as a model reaction. For a straight micro-reactor a numerical algorithm is developed to predict the behavior for non-linear kinetics.
A. Choudhary, S. Pushpavanam
openaire +1 more source
Numerical simulation of viscoelastic Dean vortices in a curved duct
Journal of Non-Newtonian Fluid Mechanics, 2009zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Helin, L., Thais, L., Mompean, G.
openaire +2 more sources
Physical Review E, 2023
The centrifugal force in flow through a curved channel initiates a hydrodynamic instability that results in the development of Dean vortices, a pair of counter-rotating roll cells across the channel that deflect the high velocity fluid in the center toward the outer (concave) wall.
Minyoung Kim, Ali Borhan
openaire +2 more sources
The centrifugal force in flow through a curved channel initiates a hydrodynamic instability that results in the development of Dean vortices, a pair of counter-rotating roll cells across the channel that deflect the high velocity fluid in the center toward the outer (concave) wall.
Minyoung Kim, Ali Borhan
openaire +2 more sources
Mass transfer enhancement of hollow fiber membrane deoxygenation by Dean vortices
Journal of Zhejiang University-SCIENCE A, 2019This paper reports a modeling and experimental study of the mass transfer enhancement of water deoxygenation by using a helical hollow fiber membrane (HHFM) to enable Dean vortices. Experiments demonstrated that the HHFM deoxygenating rate was doubled compared with straight hollow fiber deoxygenation. A new model to describe the HHFM deoxygenation mass
Qing-ran Kong +6 more
openaire +1 more source
Three-dimensional hydrodynamic flow and particle focusing using four vortices Dean flow
Microfluidics and Nanofluidics, 2014We present a three-dimensional (3D) hydrodynamic focusing device built on a single-layer platform using single sheath flow. Despite the simple structure and operation, the device not only achieves narrow focusing of a sample fluid or particles but also switches the cross-sectional size and lateral position of the sample stream.
Byung Hang Ha +3 more
openaire +1 more source
Unraveling effects of Dean vortices on membrane fouling in a sinusoidally curved channel
Journal of Membrane Science, 2020Abstract Particulate fouling is detrimental to membrane-based processes for water/wastewater treatment, water reclamation, desalination, and other applications. Although it has been recognized that curved channels can induce Dean vortices (i.e., the secondary flows arising from the centrifugal instability), the effects of the Dean vortices on the ...
Xin Liu, Dongyu Du, Guoquan Tu, Weiyi Li
openaire +1 more source
Experimental Investigation of a Free Round Jet with Dean Vortices
Siberian Journal of Physics, 2014Results of the experimental investigations of free round jet with Dean vortices formed in curved channel are presented. Hot-wire anemometry measurements of three-dimensional mean velocity profile were performed, smoke visualization pictures cross and longitudinal sections at nozzle exit and downstream were obtained.
Maria Litvinenko +3 more
openaire +1 more source
Wavenumber selection and irregularity of spatially developing nonlinear Dean and Görtler vortices
Journal of Fluid Mechanics, 1994Spatially developing vortices found in curved channels (Dean vortices) and in a concave boundary layer (Görtler vortices) asre studied numerically using Legendre spectral-element methods. The linear instability of these vortices with respect to spanwise perturbations (Eckhaus instability) is examined using parabolized spatial stability analysis.
Guo, Y., Finlay, W. H.
openaire +2 more sources