Flow characteristics in a heterogeneous bubbly flow associated with a top-submerged lance gas injection

IF 4.1 2区工程技术 Q2 ENGINEERING, CHEMICAL

Chemical Engineering Science Pub Date : 2025-02-06 DOI:10.1016/j.ces.2025.121315

Lingling Cao , Maarten Vanierschot , Huajian Wu , Lin Yi , Pei You , Zhou Wang , Qing Liu , Yannan Wang

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引用次数: 0

Abstract

Bearing very different flow features to the widely studied homogeneous bubbly flow, the flow formed by top-submerged lance (TSL) gas injection, i.e., TSL flow, possesses heterogeneous and anisotropic properties. Time-resolved particle imaging velocimetry (TR-PIV) experiments were performed to measure the flow data. The results show that a large vortical region are present in the near-wall, in the near-interface and in the bubbly regions. Besides, small vortical regions are dispersed in the shear dominated region. The probability density function (PDF) profiles of the velocity fluctuations indicate that the TSL flow is clearly anisotropic. The heterogeneous flow regimes result in a different turbulent kinetic energy (TKE) transfer behavior. A f^-5/3 scaling and f^-3 scaling of the energy spectrum were observed, and the two scalings can coexist in specific flow regimes. In addition, an inverse energy transfer phenomenon characterized by a negative turbulent production was noticed in the TSL flow.

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来源期刊

Chemical Engineering Science 工程技术-工程：化工

CiteScore

7.50

自引率

8.50%

发文量

1025

审稿时长

50 days

期刊介绍： Chemical engineering enables the transformation of natural resources and energy into useful products for society. It draws on and applies natural sciences, mathematics and economics, and has developed fundamental engineering science that underpins the discipline. Chemical Engineering Science (CES) has been publishing papers on the fundamentals of chemical engineering since 1951. CES is the platform where the most significant advances in the discipline have ever since been published. Chemical Engineering Science has accompanied and sustained chemical engineering through its development into the vibrant and broad scientific discipline it is today.