Twisted tapes with disturbed swirling motion hinders ions transport

J.G.D. Tadimeti, A. Chandra, S. Chattopadhyay*, I.I.T.Roorkee, India

Three different class of flow promoters (i) twisted tape, (ii) twisted tape with cuts and (iii) rod were placed in the rectangular flow channel separated by two polar (counter-ionic) membranes to understand the ion removal effectiveness per unit power consumption. Pressure drops occurring with each promoter were estimated at four different flowrates (5, 10, 15, 20 LPH). Relative performance of any promoter was evaluated and compared with empty channel based on the Sherwood number, Sh, power number, Pn, Reynolds’ number, Re and friction factor, f, relative performance of any geometry with reference to the empty channel. Monolayer twisted tape showed 40% rise in Sh for a spacing per unit membrane gap, d/h = 5.3 relative to empty channel. With reduced spacing i.e. d/h did not show consistent improvement in ion transport. Twisted tape resulting uniform swirling motion showed...

Session: M4 - Short Oral + Poster Presentations
Day: 14 March 2018
Time: 14:45 - 16:45 h

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