Process Design Aspects of Jet Mixers

Abstract

In the present work, mixing time measurements have been made with jet mixers over a wide range of jet velocities, liquid levels and tank sizes. The nozzle was kept along the axis of the vessel and the nozzle clearance was varied over a wide range. It was observed that the mixing time decreases with an increase in the jet path length (nozzle clearance) for a given tank size and given amount of liquid. The reasons for this behaviour are explained with the help of CFD modelling. The effect of tank diameter has been studied independent of the jet path length. A correlation has been developed for process design. Jet mixers have been compared with impeller‐stirred tanks in terms of their energy efficiency. Reasons for the observed behaviour have been provided.

Solid Suspension in Jet Mixers

“…However, no basis was given for such relationships. It has been reported in the past (Patwardhan and Gaikwad, 2003;Patwardhan and Thatte, 2004) that the nozzle diameter, nozzle clearance and its orientation have signifi cant impact on the power required to achieve a Experiments have been carried out with jet mixers to study the solid suspension characteristics. The jet velocities required for solid suspension in 0.5 and 1 m ID tanks were measured experimentally.…”

“…Fossett and Prosser (1949), Rice (1986), Revill (1992), Grenville and Tilton (1996), Patwardhan (2002), and Patwardhan and Gaikwad (2003) have carried out studies to investigate the performance of jet mixers for liquid mixing. Patwardhan and Thatte (2004) have indicated that for liquid mixing, jet mixers would be more energy effi cient as compared…”

Recurrence Quantity Analysis of the Instantaneous Pressure Fluctuation Signals in the Novel Tank with Multi-Horizontal Submerged Jets

“…Simulations of mixing performance in various vessel configurations have been conducted as shown in the References of Jayanti 13 , Zughbi and Rakib 14 . Patwardhan and Thatte 15 investigated the effects of jet velocity, nozzle clearance, liquid depth, and tank size on mixing time with the help of CFD modeling. Some efforts on computational fluid dynamics and experimental studies of mixing in fluid-jet-agitated tanks have been made [16][17][18][19][20][21] .…”

Analysis of pressure fluctuations induced by multi‐horizontal submerged jets in the novel jet tank

“…M ixing can be achieved in a variety of ways including mechanical agitation, agitation by a fluid jet impingement or by static mixer. [1][2][3][4][5][6][7] This article is concerned with mixing by a fluid jet impingement. Jet mixing can be described as a fast-moving stream of liquid being injected into a slow-moving or stationary liquid.…”