Impact of stirrer rotational speed on liquid circulation in a rectangular vessel – a study applying DPIV

Grzegorz Ligus,Marek Wasilewski,B Kaźmierczak,K Piekarska,M Kutyłowska,P Jadwiszczak

doi:10.1051/e3sconf/20184400096

Grzegorz Ligus, Marek Wasilewski + Show 4 more

Open Access

https://doi.org/10.1051/e3sconf/20184400096

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Journal: E3S Web of Conferences	Publication Date: Jan 1, 2018
Citations: 5	License type: CC BY 4.0

Affiliation: Opole University of Technology

Abstract

This paper contains the results of experimental study concerned with liquid mixing process using a stirrer located in a rectangular vessel. The current study applied Digital Particle Image Velocimetry technique (DPIV). On the basis of non-invasive measurements, velocity vector profiles were determined with regard to the velocity of the mixing process, and they were subsequently applied for identification and assessment of liquid circulation in a vessel. The correlation between the rotational speed of the stirrer and fluctuations and directions of the liquid flow velocity were determined. This paper focuses on the assessment of the mixing intensity resulting from the rectangular geometry of the vessel. The study proposes and develops a dependence between the shape of the velocity profile of the circulating liquid and the intensity of the mixing process. The study demonstrates the existence of suitable conditions for performing mixing processes in rectangular vessels.

Highlights

Liquid mixing forms one of the most common processes in industry
After the completion of a series of analytical procedures and calculations (Fig. 2), the assessment of the hydrodynamics of the liquid circulation was performed throughout the duration of the mixing process
Throughout the process of determining the vector and scalar velocity profiles in the vertical measurement configurations of the rectangular vessel, standard axial circulations were identified in the mixing process (Fig. 3)

Summary

Introduction

Liquid mixing forms one of the most common processes in industry. The principal technology can rely on mixing, it usually forms just a part of a processing line in industry. Throughout the process of determining the vector and scalar velocity profiles in the vertical measurement configurations of the rectangular vessel, standard axial circulations were identified in the mixing process (Fig. 3).

Results

Conclusion