scholarly journals Solar passive distiller with high productivity and Marangoni effect-driven salt rejection

2020 ◽  
Vol 13 (10) ◽  
pp. 3646-3655
Author(s):  
Matteo Morciano ◽  
Matteo Fasano ◽  
Svetlana V. Boriskina ◽  
Eliodoro Chiavazzo ◽  
Pietro Asinari
Keyword(s):  
Salt Concentration ◽  
Concentration Gradient ◽  
Marangoni Effect ◽  
High Productivity ◽  
Salt Rejection

The Marangoni effect (associated to salt concentration gradient) is found having an important role to enhance the salt rejection process in passive desalination technologies.

Ferrohydrodynamic Capillary Convection

2018 ◽  
Vol 11 (2) ◽  
Author(s):  
Francisco J. Arias ◽  
Salvador A. De Las Heras
Keyword(s):  
Magnetic Field ◽  
Surface Tension ◽  
Concentration Gradient ◽  
Deductive Reasoning ◽  
Marangoni Convection ◽  
Marangoni Effect ◽  
Magnetic Fluids ◽  
Homogeneous Magnetic Field ◽  
Gradient Field ◽  
Two Fluids

Abstract In this work, consideration is given to capillary convection on ferrofluids from the concentration gradient induced when a nonhomogeneous magnetic field is applied. It is known that mass transfer along an interface between two fluids can appear due to a gradient of the surface tension in the so-called Marangoni effect (or Gibbs–Marangoni effect). Because the surface tension is both thermal and concentration dependent, Marangoni convection can be induced by either a thermal or a concentration gradient, where in the former case, it is generally referred as thermocapillary convection. Now, it has been theoretically and experimentally demonstrated that a ferrofluid under the action of a non-homogeneous magnetic field can induce a concentration gradient of suspended magnetic nanoparticles, and also the effect of Fe3O4 nanoparticles on the surface tension has been measured. Therefore, by deductive reasoning and taking into account the above mentioned facts, it is permissible to infer ferrohydrodynamic capillary convection on magnetic fluids under the presence of a magnetic gradient field. Utilizing a simplified physical model, the phenomenon was investigated and it was found that ferrohydrodynamic-Marangoni convection could be induced with particle size in the range up to 10 nm, which is the range of magnetic fluids to escape magnetic agglomeration.

ATIG Welding of Duplex Steel

2008 ◽  
Vol 589 ◽  
pp. 49-54 ◽  
Author(s):  
Tamás Sándor
Keyword(s):  
Weld Joint ◽  
Marangoni Effect ◽  
Tig Welding ◽  
Experimental Results ◽  
Grain Structure ◽  
High Productivity ◽  
Duplex Steel ◽  
Effect Theory ◽  
Advantageous Effect

The ATIG welding which is the high productivity version of conventional TIG welding, parallel with productivity increasing has some advantageous effect both on HAZ and weld joint grain structure. In this paper the effect of ATIG welding on austenite/ferrite ratio in duplex steel will be represented with experimental results performed on 8 mm thick 2205 type duplex steel. As collateral benefit through these results new evidences are originated to prove the “reversed Marangoni effect” theory.

scholarly journals Polymer capture by α-hemolysin pore upon salt concentration gradient

2014 ◽  
Vol 140 (1) ◽  
pp. 015101 ◽  
Author(s):  
Byoung-jin Jeon ◽  
Murugappan Muthukumar
Keyword(s):  
Salt Concentration ◽  
Concentration Gradient

Nanofiltration in the manufacture of liquid dyes production

2010 ◽  
Vol 61 (7) ◽  
pp. 1865-1873 ◽  
Author(s):  
P. Mikulášek ◽  
J. Cuhorka
Keyword(s):  
Mathematical Modelling ◽  
Salt Concentration ◽  
Pressure Difference ◽  
Constant Pressure ◽  
Salt Solutions ◽  
Nanofiltration Membranes ◽  
Salt Rejection ◽  
The Stability ◽  
High Level

In the manufacture of liquid dyes, almost complete desalting, which helps to improve the stability of the product, enhances the solubility of the dye. Diafiltration is used to allow a high level of desalting to be achieved. The process of desalination of aqueous dye-salt solutions by polymeric nanofiltration membranes using commercially available modules was studied. The influence of dye and salt concentration on the salt rejection and pressure applied on the flux as well as comparison of individual NF membranes for desalting purposes is presented. The great interest is also devoted to the mathematical modelling of nanofiltration and description of discontinuous diafiltration by periodically adding solvent at constant pressure difference.

Diffusiophoresis of a polyelectrolyte in a salt concentration gradient

2012 ◽  
Vol 33 (6) ◽  
pp. 1068-1078 ◽  
Author(s):  
Kuan-Liang Liu ◽  
Jyh-Ping Hsu ◽  
Wei-Lun Hsu ◽  
Li-Hsien Yeh ◽  
Shiojenn Tseng
Keyword(s):  
Salt Concentration ◽  
Concentration Gradient

scholarly journals Enhancing the volume and the optical quality of hen egg-white lysozyme crystals by coupling the salt concentration gradient crystallization method with a magnetic field

2012 ◽  
Vol 45 (5) ◽  
pp. 1066-1068 ◽  
Author(s):  
Elena Magay ◽  
Sang Jin Cho ◽  
Shin Ae Kim
Keyword(s):  
Magnetic Field ◽  
Salt Concentration ◽  
Concentration Gradient ◽  
Egg White ◽  
Optical Quality ◽  
Hen Egg White Lysozyme ◽  
Egg White Lysozyme ◽  
Crystallization Method ◽  
Hen Egg White ◽  
Hen Egg

The effect of coupling the salt concentration gradient crystallization method with the use of the paramagnetic salt MnCl2and a magnetic field is reported. The use of a simple magnetic device is proposed to have a significant effect on hen egg-white lysozyme crystal growth. Large single crystals greater than 10 mm3in volume with optical perfection were consistently obtained in this study.

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