{"title":"Effect of nozzle shape on bubble column reactor with constant flow rate","authors":"Sachin Kumar, Raj Kumar Singh, Bahni Ray","doi":"10.1002/cjce.25624","DOIUrl":null,"url":null,"abstract":"<p>The present investigation is focused on the bubble formation from different shaped nozzles: straight nozzle, straight converging nozzle, straight diverging nozzle, converging nozzle, and submerged nozzle, with a constant flow rate of 0.008 m/s and static contact angle of 45°, respectively. The effective dimension of the nozzle has been taken as 2 mm radius and 3 mm height. The impact of varying nozzle shapes on changes in bubble volume and the occurrence of different pinch-off times have been observed. A maximum pinch-off time of 1.854 s on straight nozzle and minimum of 0.078 s on converge nozzle with bubble volumes 111.36 mm<sup>3</sup> and 62.12 mm<sup>3</sup> was obtained. Maximum bubble volume attained from diverging nozzle was 123.21 mm<sup>3</sup> with optimum pinch-off time, which is highly useful for bioreactor application.</p>","PeriodicalId":9400,"journal":{"name":"Canadian Journal of Chemical Engineering","volume":"103 8","pages":"4051-4064"},"PeriodicalIF":1.6000,"publicationDate":"2025-02-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Canadian Journal of Chemical Engineering","FirstCategoryId":"5","ListUrlMain":"https://onlinelibrary.wiley.com/doi/10.1002/cjce.25624","RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q3","JCRName":"ENGINEERING, CHEMICAL","Score":null,"Total":0}
引用次数: 0
Abstract
The present investigation is focused on the bubble formation from different shaped nozzles: straight nozzle, straight converging nozzle, straight diverging nozzle, converging nozzle, and submerged nozzle, with a constant flow rate of 0.008 m/s and static contact angle of 45°, respectively. The effective dimension of the nozzle has been taken as 2 mm radius and 3 mm height. The impact of varying nozzle shapes on changes in bubble volume and the occurrence of different pinch-off times have been observed. A maximum pinch-off time of 1.854 s on straight nozzle and minimum of 0.078 s on converge nozzle with bubble volumes 111.36 mm3 and 62.12 mm3 was obtained. Maximum bubble volume attained from diverging nozzle was 123.21 mm3 with optimum pinch-off time, which is highly useful for bioreactor application.
期刊介绍：
The Canadian Journal of Chemical Engineering (CJChE) publishes original research articles, new theoretical interpretation or experimental findings and critical reviews in the science or industrial practice of chemical and biochemical processes. Preference is given to papers having a clearly indicated scope and applicability in any of the following areas: Fluid mechanics, heat and mass transfer, multiphase flows, separations processes, thermodynamics, process systems engineering, reactors and reaction kinetics, catalysis, interfacial phenomena, electrochemical phenomena, bioengineering, minerals processing and natural products and environmental and energy engineering. Papers that merely describe or present a conventional or routine analysis of existing processes will not be considered.
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