Ravi Raushan , Yogesh M. Nimdeo , Gaurav A. Bhaduri , Harish Pothukuchi
{"title":"乙二醇-水混合物饱和池沸腾过程中的气泡动力学","authors":"Ravi Raushan , Yogesh M. Nimdeo , Gaurav A. Bhaduri , Harish Pothukuchi","doi":"10.1016/j.cherd.2025.09.018","DOIUrl":null,"url":null,"abstract":"<div><div>The present study numerically investigates the growth behavior of an isolated vapour bubble during nucleate pool boiling in an ethylene glycol (EG)-water mixture at saturation temperature and atmospheric pressure. EG concentration was varied from 0 % to 50 % by weight, and the isothermal wall superheat <span><math><mrow><mfenced><mrow><mo>∆</mo><msub><mrow><mi>T</mi></mrow><mrow><mi>sup</mi></mrow></msub></mrow></mfenced></mrow></math></span> ranged between 8 and 15 K. A 2D axisymmetric fluid domain (5 mm×12 mm) with a uniform grid of 40 µm size was employed. Simulation was performed using Volume of Fluid (VOF) method in Ansys Fluent, incorporating user-defined functions (udf’s) to model phase change. The study examined the influence of EG concentration and <span><math><mrow><mo>∆</mo><msub><mrow><mi>T</mi></mrow><mrow><mi>sup</mi></mrow></msub></mrow></math></span> on bubble growth dynamics and departure diameter. Results indicate that increasing EG concentration suppresses bubble growth and delays departure. Compared to pure water, a 50 % EG-water mixture exhibited an approximate 20 % reduction in equivalent bubble departure diameter. This reduction is attributed to increase heat and mass transfer resistant at the vapour-liquid interface and lower surface tension of the EG-water mixture. The IR spectroscopy revealed weaker hydrogen bonding and structural changes with increasing EG concentration, enhances the hydrophilicity behavior of EG molecules, thereby promoting bulk dispersion and reducing surface tension.</div></div>","PeriodicalId":10019,"journal":{"name":"Chemical Engineering Research & Design","volume":"222 ","pages":"Pages 377-390"},"PeriodicalIF":3.9000,"publicationDate":"2025-09-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Bubble dynamics in saturated pool boiling of ethylene glycol–water mixtures\",\"authors\":\"Ravi Raushan , Yogesh M. Nimdeo , Gaurav A. Bhaduri , Harish Pothukuchi\",\"doi\":\"10.1016/j.cherd.2025.09.018\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><div>The present study numerically investigates the growth behavior of an isolated vapour bubble during nucleate pool boiling in an ethylene glycol (EG)-water mixture at saturation temperature and atmospheric pressure. EG concentration was varied from 0 % to 50 % by weight, and the isothermal wall superheat <span><math><mrow><mfenced><mrow><mo>∆</mo><msub><mrow><mi>T</mi></mrow><mrow><mi>sup</mi></mrow></msub></mrow></mfenced></mrow></math></span> ranged between 8 and 15 K. A 2D axisymmetric fluid domain (5 mm×12 mm) with a uniform grid of 40 µm size was employed. Simulation was performed using Volume of Fluid (VOF) method in Ansys Fluent, incorporating user-defined functions (udf’s) to model phase change. The study examined the influence of EG concentration and <span><math><mrow><mo>∆</mo><msub><mrow><mi>T</mi></mrow><mrow><mi>sup</mi></mrow></msub></mrow></math></span> on bubble growth dynamics and departure diameter. Results indicate that increasing EG concentration suppresses bubble growth and delays departure. Compared to pure water, a 50 % EG-water mixture exhibited an approximate 20 % reduction in equivalent bubble departure diameter. This reduction is attributed to increase heat and mass transfer resistant at the vapour-liquid interface and lower surface tension of the EG-water mixture. The IR spectroscopy revealed weaker hydrogen bonding and structural changes with increasing EG concentration, enhances the hydrophilicity behavior of EG molecules, thereby promoting bulk dispersion and reducing surface tension.</div></div>\",\"PeriodicalId\":10019,\"journal\":{\"name\":\"Chemical Engineering Research & Design\",\"volume\":\"222 \",\"pages\":\"Pages 377-390\"},\"PeriodicalIF\":3.9000,\"publicationDate\":\"2025-09-12\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Chemical Engineering Research & Design\",\"FirstCategoryId\":\"5\",\"ListUrlMain\":\"https://www.sciencedirect.com/science/article/pii/S0263876225004952\",\"RegionNum\":3,\"RegionCategory\":\"工程技术\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q2\",\"JCRName\":\"ENGINEERING, CHEMICAL\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Chemical Engineering Research & Design","FirstCategoryId":"5","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0263876225004952","RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"ENGINEERING, CHEMICAL","Score":null,"Total":0}
Bubble dynamics in saturated pool boiling of ethylene glycol–water mixtures
The present study numerically investigates the growth behavior of an isolated vapour bubble during nucleate pool boiling in an ethylene glycol (EG)-water mixture at saturation temperature and atmospheric pressure. EG concentration was varied from 0 % to 50 % by weight, and the isothermal wall superheat ranged between 8 and 15 K. A 2D axisymmetric fluid domain (5 mm×12 mm) with a uniform grid of 40 µm size was employed. Simulation was performed using Volume of Fluid (VOF) method in Ansys Fluent, incorporating user-defined functions (udf’s) to model phase change. The study examined the influence of EG concentration and on bubble growth dynamics and departure diameter. Results indicate that increasing EG concentration suppresses bubble growth and delays departure. Compared to pure water, a 50 % EG-water mixture exhibited an approximate 20 % reduction in equivalent bubble departure diameter. This reduction is attributed to increase heat and mass transfer resistant at the vapour-liquid interface and lower surface tension of the EG-water mixture. The IR spectroscopy revealed weaker hydrogen bonding and structural changes with increasing EG concentration, enhances the hydrophilicity behavior of EG molecules, thereby promoting bulk dispersion and reducing surface tension.
期刊介绍:
ChERD aims to be the principal international journal for publication of high quality, original papers in chemical engineering.
Papers showing how research results can be used in chemical engineering design, and accounts of experimental or theoretical research work bringing new perspectives to established principles, highlighting unsolved problems or indicating directions for future research, are particularly welcome. Contributions that deal with new developments in plant or processes and that can be given quantitative expression are encouraged. The journal is especially interested in papers that extend the boundaries of traditional chemical engineering.