01803nas a2200241   4500008004100000022001400041245007400055210006900129260010600198300001400304490000700318520096800325653001701293653001401310653001201324653001801336653001701354100002301371700002201394700001501416700002001431856011001451       2009                        eng d  a0009-250900aPressure drop across vortex diodes: experiments and design guidelines0 aPressure drop across vortex diodes experiments and design guidel  aTHE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLANDbPERGAMON-ELSEVIER SCIENCE LTDcMAR  a1285-12920 v643 a<p>Vortex diodes are used as leaky non-return valves in applications where it is desirable to avoid valves with moving parts. Despite their use in practice for several decades, no clear guidelines for design and optimization of vortex diodes are available. Detailed experimental study on flow and pressure drop characteristics of vortex diodes was therefore carried out to evolve such guidelines. The study covered a wide range of vortex diodes. The variation of diodicity (ratio of pressure drop for reverse and forward flow for the same flow rate) with respect to diode geometry, diode size (d(c)), aspect ratio (d(c)/h), nozzle configuration and Reynolds number (Re) was studied. The experimental results were critically analyzed to develop a design methodology. The methodology is shown to be useful for obtaining the diode dimensions that would yield the desired diodicity for the required operating flow rate. (c) 2008 Elsevier Ltd. All rights reserved.</p>10aAspect ratio10aDiodicity10aNozzles10apressure drop10aVortex diode1 aKulkarni, Amol, A.1 aRanade, Vivek, V.1 aRajeev, R.1 aKoganti, S., B.  uhttps://library.ncl.res.in/content/pressure-drop-across-vortex-diodes-experiments-and-design-guidelines-002348nas a2200253   4500008004100000022001400041245006200055210006200117260000800179300001200187490000700199520157700206653002301783653001301806653001401819653001701833653001501850100002801865700002401893700003201917700002601949700002201975856009701997       2018                        eng d  a1944-744200aSolvent degradation studies using hydrodynamic cavitation0 aSolvent degradation studies using hydrodynamic cavitation  cJAN  a295-3040 v373 a<p>Hydrodynamic cavitation for the degradation of organic solvents was investigated in detail using a newer form of cavitating device-vortex diode. The results were also compared with that using conventional cavitating device orifice. Removal of three different organic solventsacetone, methyl ethyl ketone (MEK), and toluene were studied on a pilot plant with capacity of 1m(3)/h. The effect of different operating parameters such as inlet pressure, initial concentration, and reactor type on the degradation rate of solvent was investigated in detail. The results revealed that efficiency of solvent removal varies substantially with the change in physical operating conditions and nature of the solvent. It was found that up to 80% degradation could be achieved for toluene (cavitational yield 32.2 x 10(-3) mg/J), substantially higher than that for acetone and MEK indicating the effect of molecular weight/structure in the degradation process. Further, the results clearly indicated chemical oxidation as a predominant mechanism for degradation and not physical destruction. Vortex diode that works on the principle of vortex generation for cavitation, was found to be far superior over conventional cavitating device-orifice- approximate to up to eight times higher cavitational yield could be obtained for toluene as compared to orifice. The results of this study provide newer insight into solvent removal using hydrodynamic cavitation and would have bearing on the treatment of solvent containing wastewaters. (C) 2017 American Institute of Chemical Engineers</p>10aEffluent treatment10aindustry10apollution10aVortex diode10awastewater1 aSuryawanshi, Pravin, G.1 aBhandari, Vinay, M.1 aSorokhaibam, Laxmi, Gayatri1 aRuparelia, Jayesh, P.1 aRanade, Vivek, V.  uhttps://library.ncl.res.in/content/solvent-degradation-studies-using-hydrodynamic-cavitation